format-version: 1.2 date: 22:10:2010 17:10 auto-generated-by: OBO-Edit 2.1-beta6 subsetdef: Arabidopsis "Term used for Arabidopsis" subsetdef: Citrus "Term used for citrus" subsetdef: Maize "Term used for maize" subsetdef: Musa "Terms used for banana" subsetdef: Poaceae "Term used for grasses" subsetdef: Potato "Term used for potato" subsetdef: reference "reference plant structure term" subsetdef: Rice "Term used for rice" subsetdef: Tomato "Term used for tomato" default-namespace: plant_structure [Term] id: PO:0000001 name: embryo proper def: "The body of the developing embryo attached to the maternal tissue in the ovule by filamentous suspensor." [TAIR:ki] relationship: part_of PO:0009009 ! embryo [Term] id: PO:0000002 name: anther wall def: "A multicellular layer with outer epidermis and an inner endothecium." [GR:pj] subset: reference is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009070 ! microsporangium [Term] id: PO:0000003 name: whole plant def: "A plant structure which is a whole organism." [POC:curators] comment: Examples include seed PO:0009010 and embryo PO:0009009. subset: reference synonym: "gametophyte" NARROW [] synonym: "seedling" NARROW [] synonym: "sporophyte" NARROW [] xref: OBO_SF_PO:2968335 is_a: PO:0009011 ! plant structure [Term] id: PO:0000004 name: in vitro plant structure def: "A plant structure that was derived from part of a plant and involves microbe-free growth in a sterile environment." [POC:curators] comment: An example of a sterile culture environment is growth on or in a nutrient medium in a Petri dish or test tube. Microbes may be intentionally added to the culture environment, such as in co-culture with Agrobacterium. xref: OBO_SF_PO:2958948 is_a: PO:0009011 ! plant structure [Term] id: PO:0000005 name: cultured cell def: "In vitro grown isolated cells and small cell aggregates that proliferate while suspended in liquid sterile medium or spread on a solid agar medium." [TAIR:ki] comment: In cell cultures, the cells are no longer organized into tissues. synonym: "cell suspension" RELATED [] is_a: PO:0000004 ! in vitro plant structure [Term] id: PO:0000006 name: cultured protoplast def: "In vitro isolated cells from which the entire cell wall has been enzymatically removed." [TAIR:ki] is_a: PO:0000005 ! cultured cell [Term] id: PO:0000007 name: cultured leaf cell def: "In vitro grown isolated cells and small cell aggregates that originated from isolated leaf protoplasts (after they re-established cell wall, or from callus that was induced from leaf tissue)." [TAIR:ki] is_a: PO:0000005 ! cultured cell [Term] id: PO:0000008 name: cultured root cell def: "In vitro grown isolated cells and small cell aggregates that originated from isolated protoplasts after they re-established cell wall, or from callus that was induced from segment of root." [TAIR:ki] is_a: PO:0000005 ! cultured cell [Term] id: PO:0000009 name: cutured callus def: "In vitro grown cell aggregates that originated from isolated protoplasts, cell suspensions, or from callus that was induced in sterile medium supplemented by plant growth regulators." [TAIR:ki] is_a: PO:0000004 ! in vitro plant structure [Term] id: PO:0000010 name: cultured embryo def: "In vitro isolated and maintained mature or immature zygotic embryos, somatic embryos or haploid embryos (derived from male gametophyte)." [TAIR:ki] is_a: PO:0000004 ! in vitro plant structure [Term] id: PO:0000011 name: cultured somatic embryo def: "An embryo arising from previously differentiated somatic cells in vitro, rather than from fused haploid gametes, i.e., zygote." [TAIR:ki] is_a: PO:0000010 ! cultured embryo relationship: develops_from PO:0006091 ! embryogenic callus [Term] id: PO:0000012 name: apical hook def: "Hook-like structure which develops at the apical part of the hypocotyl in dark-grown seedlings in dicots." [TAIR:ki] subset: reference synonym: "hypocotyl hook" RELATED [] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: develops_from PO:0020100 ! hypocotyl relationship: part_of PO:0006341 ! primary shoot [Term] id: PO:0000013 name: cauline leaf def: "Leaf or pairs/whorls of leaves borne on the stem." [TAIR:ki] comment: In Arabidopsis, refers to the leaves that are borne on the elongated inflorescence branches. is_a: PO:0009025 ! vascular leaf [Term] id: PO:0000014 name: rosette leaf def: "One of multiple leaves borne in a rosette - a group of leaves, generally borne at the base of the plant, that are separated by very short internodes." [TAIR:ki] comment: Arabidopsis, vegetative development is characterized by the production of the rosette leaves. is_a: PO:0009025 ! vascular leaf [Term] id: PO:0000015 name: cotyledon primordium def: "An organized group of cells that will differentiate into a cotyledon." [TAIR:ki] is_a: PO:0020030 ! cotyledon [Term] id: PO:0000016 name: lateral root primordium def: "An organized group of cells derived from the root pericycle that will differentiate into a new root." [TAIR:ki] is_a: PO:0005029 ! root primordium is_a: PO:0020121 ! lateral root [Term] id: PO:0000017 name: leaf primordium def: "An organized group of cells that will differentiate into leaf that are emerging as an outgrowth in the shoot apex (flanking the meristem)." [TAIR:ki] synonym: "leaf meristem" RELATED [] is_a: PO:0009025 ! vascular leaf relationship: part_of PO:0000037 ! shoot apex [Term] id: PO:0000018 name: ovule primordium def: "An organized group of cells that will differentiate into ovule." [TAIR:ki] is_a: PO:0020003 ! ovule [Term] id: PO:0000019 name: gynoecium primordium def: "The very first appearance of gynoecium." [TAIR:ki] is_a: PO:0009062 ! gynoecium [Term] id: PO:0000020 name: starch sheath cell def: "OBSOLETE. Cells characterized by conspicuous and rather stable accumulation of starch." [ISBN:044174520] comment: Uninformative definition is_obsolete: true [Term] id: PO:0000021 name: petal primordium def: "The very first appearance of a petal." [TAIR:ki] is_a: PO:0009032 ! petal [Term] id: PO:0000022 name: cuticle def: "A layer of fatty material, cutin, rather impervious to water, located on the outer walls of epidermal cells." [ISBN:0471245208] is_a: PO:0004013 ! epidermal cell [Term] id: PO:0000023 name: casparian strip def: "OBSOLETE: A band-like wall formation within primary walls that contains suberin and lignin; typical of endodermal cells in roots, in which it occurs in radial and transverse anticlinal walls." [ISBN:0471245208] comment: Comment: this term is now available in the cellular_component aspect of the Gene Ontology (GO:0048226). is_obsolete: true [Term] id: PO:0000024 name: filiform apparatus def: "OBSOLETE: A complex of cell wall invaginations in a synergid cell similar to those in transfer cells." [ISBN:0471245208] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043680. subset: reference is_obsolete: true [Term] id: PO:0000025 name: root tip def: "The portion of the root including the meristem and root cap." [TAIR:ki] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009005 ! root [Term] id: PO:0000026 name: primary root tip def: "The portion of the primary root including the meristem and root cap." [TAIR:ki] is_a: PO:0000025 ! root tip relationship: part_of PO:0020127 ! primary root [Term] id: PO:0000027 name: lateral root tip def: "The portion of the lateral root including the meristem and root cap." [TAIR:ki] is_a: PO:0000025 ! root tip relationship: part_of PO:0020121 ! lateral root [Term] id: PO:0000028 name: pollen tube tip def: "Tip portion of the pollen tube that is rapidly growing." [TAIR:ki] is_a: PO:0006345 ! pollen tube relationship: part_of PO:0006345 ! pollen tube [Term] id: PO:0000029 name: root hair tip def: "Tip portion of an outgrowth of a root epidermal cell." [TAIR:ki] relationship: part_of PO:0000256 ! root hair [Term] id: PO:0000030 name: septum def: "A thin partition or membrane that divides a cavity or a mass of tissue, e.g., in anther, ovary or fruit." [APWeb:Glossary] is_a: PO:0009007 ! portion of plant tissue [Term] id: PO:0000031 name: lenticel def: "A portion of ground tissue composed of a loosely-packed mass of cork cells occurring especially in the young stem, bark or even leaf of a plant, visible on the surface as a raised, often powdery-appearing spot." [ISBN:0471245208] comment: Gas can be exchanged through the lenticel. is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0025029 ! shoot axis [Term] id: PO:0000032 name: tetrad of microspores def: "A group of four haploid cells that remained joined together shortly after meiosis. Each cell will give rise to the male gametophyte." [TAIR:ki] subset: reference relationship: develops_from PO:0020047 ! microsporocyte [Term] id: PO:0000033 name: valve def: "Portion of an organ that is fragmented; in capsule, the portions into which the pericarp splits at maturity." [APWeb:Glossary] subset: Arabidopsis relationship: part_of PO:0009001 ! fruit [Term] id: PO:0000034 name: vascular system def: "A plant structure that includes the totality of the portions of vascular tissue in their specific arrangement in a whole plant or in a constituent part thereof." [ISBN:0-7167-1007-2, ISBN:0471245208, POC:curators] comment: The vascular system may also contain portions of ground tissue. is_a: PO:0009011 ! plant structure relationship: part_of PO:0000003 ! whole plant [Term] id: PO:0000035 name: cotyledon vascular system def: "A vascular system that is part of a cotyledon." [TAIR:ki] is_a: PO:0000034 ! vascular system relationship: part_of PO:0008011 ! embryo vascular system relationship: part_of PO:0020030 ! cotyledon [Term] id: PO:0000036 name: leaf vascular system def: "Vascular system of the leaf." [TAIR:ki] is_a: PO:0000034 ! vascular system relationship: part_of PO:0009025 ! vascular leaf relationship: part_of PO:0020138 ! leaf vein [Term] id: PO:0000037 name: shoot apex def: "The topmost part of the shoot, situated at the distal extremity of the shoot axis, consists of apical meristem and the youngest leaf primordia." [TAIR:ki] subset: reference relationship: part_of PO:0009006 ! shoot system [Term] id: PO:0000038 name: primary endosperm cell def: "Cell produced by the fusion of sperm cell nucleus and two polar nuclei of the central cell (or diploid secondary endosperm nucleus, in cases where two polar nuclei fuse together before double fertilization). The first cell of the endosperm, often tripoid." [TAIR:ki] is_a: PO:0025026 ! megagametophytic cell relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0000039 name: shoot axis vascular system def: "A vascular system that is part of a shoot axis." [POC:curators] comment: Can occur in a stem or branch. synonym: "branch vascular system" NARROW [] synonym: "stem vascular system" NARROW [] is_a: PO:0000034 ! vascular system relationship: part_of PO:0025029 ! shoot axis [Term] id: PO:0000040 name: adventitious root nodule def: "Enlargement or swelling at position of dormant adventitious root primordium (on the stem), inhabited by nitrogen-fixing bacteria." [TAIR:ki] comment: Unlike the root nodules, these contain functioning chloroplasts in the nodule cortex and are therefore capable of carbon fixation. Note: stem nodule is commonly used term for this structure, although the nodules are formed at positions of dormant adventitious root primordia. synonym: "stem primordium" RELATED [] is_a: PO:0003023 ! root nodule relationship: part_of PO:0000042 ! shoot-borne root [Term] id: PO:0000041 name: epidermal cork cell def: "One of the two types of short cells in the epidermis of grasses and bamboos. It is usually paired with silica cell." [TAIR:ki] comment: Developmentally different from periderm cork cell (i.e., phellem), produced by cork cambium. is_a: PO:0004718 ! short cell [Term] id: PO:0000042 name: shoot-borne root alt_id: PO:0003007 alt_id: PO:0020129 def: "A post-embryonic root that develops from shoot tissue." [GR:pj, TAIR:ki] subset: reference synonym: "adventitious root" BROAD [] synonym: "aerial root" NARROW [] synonym: "stilt root" NARROW [] is_a: PO:0009005 ! root [Term] id: PO:0000043 name: crown root def: "Adventitious root formed at the base of the growing stem (known as a crown)." [TAIR:ki] subset: reference is_a: PO:0003005 ! nodal root [Term] id: PO:0000044 name: prop root def: "Adventitious root formed at stem nodes above the ground and growing directly into the soil." [TAIR:ki] comment: This term is perhaps best defined functionally to prop the plant up. subset: reference synonym: "brace root" RELATED [] is_a: PO:0003005 ! nodal root [Term] id: PO:0000045 name: embryonic root def: "Root that is initiated in developing embryo." [TAIR:ki] subset: reference is_a: PO:0009005 ! root relationship: part_of PO:0009009 ! embryo [Term] id: PO:0000046 name: seminal root def: "Root formed within the scutelar node of the embryo in some monocotyledonous plants." [TAIR:ki] subset: reference synonym: "lateral seminal root" RELATED [] synonym: "scutellar nodal root" RELATED [] synonym: "secondary root" RELATED [] is_a: PO:0000045 ! embryonic root is_a: PO:0003005 ! nodal root [Term] id: PO:0000047 name: leaf lamina epidermis def: "Epidermal layer of a leaf blade." [TAIR:ki] is_a: PO:0006016 ! leaf epidermis relationship: part_of PO:0020039 ! leaf lamina [Term] id: PO:0000048 name: leaf lamina vascular system def: "Vascular system of the leaf lamina." [TAIR:ki] is_a: PO:0000034 ! vascular system relationship: part_of PO:0000036 ! leaf vascular system relationship: part_of PO:0020039 ! leaf lamina [Term] id: PO:0000049 name: leaf lamina abaxial epidermis def: "The epidermal layer of the abaxial/lower surface of the leaf blade." [TAIR:ki] is_a: PO:0000047 ! leaf lamina epidermis [Term] id: PO:0000050 name: leaf lamina adaxial epidermis def: "The epidermal layer of the adaxial/upper surface of the leaf blade." [TAIR:ki] is_a: PO:0000047 ! leaf lamina epidermis [Term] id: PO:0000051 name: petiole epidermis def: "A portion of leaf epidermis that is part of a leaf petiole." [TAIR:ki] is_a: PO:0006016 ! leaf epidermis relationship: part_of PO:0020038 ! petiole [Term] id: PO:0000052 name: petiole vascular system def: "Vascular system of the leaf petiole." [TAIR:ki] is_a: PO:0000034 ! vascular system relationship: part_of PO:0000036 ! leaf vascular system relationship: part_of PO:0020038 ! petiole [Term] id: PO:0000053 name: petiole cortex def: "A portion of ground tissue that is part of a cortex and part of the petiole." [POC:curators, TAIR:ki] is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0005708 ! cortex relationship: part_of PO:0020038 ! petiole [Term] id: PO:0000054 name: petal vascular system def: "Total of the vascular tissues in their specific arrangement in the petal." [POC:curators] is_a: PO:0005017 ! flower vascular system relationship: part_of PO:0009032 ! petal [Term] id: PO:0000055 name: bud def: "An undeveloped shoot system." [POC:curators] xref: OBO_SF_PO:3016634 is_a: PO:0009006 ! shoot system [Term] id: PO:0000056 name: floral bud def: "A bud that develops into a flower." [POC:curators] is_a: PO:0025084 ! reproductive bud [Term] id: PO:0000057 name: inflorescence bud def: "A bud that develops into an inflorescence." [POC:curators] is_a: PO:0025084 ! reproductive bud [Term] id: PO:0000058 name: vegetative bud def: "A bud that develops into a vegetative shoot system." [POC:curators] xref: OBO_SF_PO:3020771 is_a: PO:0000055 ! bud [Term] id: PO:0000059 name: root initial cell def: "Cell in the root apical meristem that by division gives rise to two cells one of which remains in the meristem, the other is added produces different root cells." [TAIR:ki] synonym: "root stem cell" RELATED [] is_a: PO:0020147 ! root apical meristem [Term] id: PO:0000060 name: root cortex-endodermis initial cell def: "Cell that produces root cortex and endodermis. In direct contact with quiescent center." [TAIR:ki] synonym: "root cortex-endodermis stem cell" RELATED [] is_a: PO:0000059 ! root initial cell [Term] id: PO:0000061 name: lateral root-cap-epidermal initial cell def: "Cell that produces lateral root-cap cells and root epidermis." [POC:curators] synonym: "lateral root-cap-epidermal stem cell" RELATED [] is_a: PO:0000059 ! root initial cell [Term] id: PO:0000066 name: epithem cell def: "Cell of the mesophyll of a hydathode found between the xylem endings and the epidermis." [ISBN:0471245208, PMID:12662305] comment: Proposed to be involved in the retrieval of solutes from the xylem sap. xref: CL:0000074 is_a: PO:0025030 ! ground tissue cell relationship: part_of PO:0005660 ! hydathode [Term] id: PO:0000070 name: meristemoid def: "A cell or a group of cells constituting an active locus of meristematic activity in a tissue composed of somewhat older, differentiating cells." [ISBN:0471245208, PO:syr] xref: CL:0000266 is_a: PO:0009002 ! plant cell [Term] id: PO:0000071 name: companion cell def: "A specialized parenchyma cell associated with a sieve-tube member in angiosperm phloem and arising from the same mother cell as the sieve-tube member." [ISBN:0879015322] xref: CL:0000284 is_a: PO:0000074 ! parenchyma cell relationship: part_of PO:0005043 ! secondary phloem relationship: part_of PO:0006075 ! primary phloem [Term] id: PO:0000074 name: parenchyma cell def: "A relatively unspecialized cell with a nucleate protoplast." [ISBN:0471245208] is_a: PO:0025030 ! ground tissue cell relationship: part_of PO:0005421 ! parenchyma [Term] id: PO:0000075 name: collenchyma cell def: "Elongated living cells with unevenly thickened nonlignified primary walls." [ISBN:0471245208] is_a: PO:0025030 ! ground tissue cell relationship: part_of PO:0005423 ! collenchyma [Term] id: PO:0000076 name: chlorenchyma cell def: "Parenchyma cell containing chloroplasts; a component of leaf mesophyll and other green parenchyma tissue." [ISBN:0471245208] xref: CL:0000472 is_a: PO:0000074 ! parenchyma cell relationship: part_of PO:0005426 ! chlorenchyma [Term] id: PO:0000077 name: sclerenchyma cell def: "Usually dead cell variable in form and size, with more or less thick, often lignified, secondary walls." [ISBN:0471245208] xref: CL:0000276 is_a: PO:0025030 ! ground tissue cell relationship: part_of PO:0005427 ! sclerenchyma [Term] id: PO:0000078 name: transfer cell def: "A cell with wall ingrowths (or invaginations) that increase the surface of the plasmalemma." [ISBN:0471245208] comment: Appears to be specialized for short-distance transfer of solutes. xref: CL:0000370 is_a: PO:0025030 ! ground tissue cell [Term] id: PO:0000079 name: fusiform initial alt_id: PO:0000275 def: "An elongated cell with approximately wedge-shaped ends, found in the vascular cambium, which gives rise to the elements of the axial system in the secondary vascular tissues." [ISBN:0471245208] synonym: "xylem initial" RELATED [] synonym: "xylem mother cell" RELATED [] xref: CL:0000009 is_a: PO:0000295 ! cambial initial [Term] id: PO:0000081 name: axial cell def: "A vascular cell derived from the fusiform cambial initial and oriented with its longest diameter parallel with the main axis of stem or root." [ISBN:0471245208] comment: These cells make up the axial system, also known as vertical or longitudinal system. xref: CL:0000363 is_a: PO:0009002 ! plant cell relationship: develops_from PO:0000079 ! fusiform initial [Term] id: PO:0000082 name: ray initial def: "A cell in the vascular cambium that gives rise to ray cells of the secondary xylem and secondary phloem." [ISBN:0471245208] xref: CL:0000316 is_a: PO:0000295 ! cambial initial [Term] id: PO:0000084 name: sperm cell alt_id: PO:0020098 def: "A gamete produced by an antheridium or a male gametophyte." [POC:curators] comment: In angiosperms, sperm cells are usually two in number; during double fertilization, one fuses with the egg cell to produce a zygote while another fuses with the two polar nuclei of the central cell to give rise to endosperm. subset: reference synonym: "microgamete" EXACT [] synonym: "sperm nucleus" RELATED [] xref: CL:0000366 is_a: PO:0025006 ! gamete relationship: develops_from PO:0020097 ! generative cell [Term] id: PO:0000112 name: shoot axis epidermis def: "A portion of shoot epidermis that is part of a shoot axis." [POC:curators] comment: Can occur on a stem or branch. synonym: "branch epidermis" NARROW [] synonym: "culm epidermis" RELATED [] synonym: "stem epidermis" NARROW [] is_a: PO:0025029 ! shoot axis relationship: part_of PO:0006035 ! shoot epidermis [Term] id: PO:0000115 name: socket cell def: "Cell that surrounds a trichome and provides its support." [ISBN:0471245208, PMID:15319479] synonym: "cell located at the base of the trichome" RELATED [] synonym: "trichome support cell" RELATED [] xref: CL:0000297 is_a: PO:0004013 ! epidermal cell relationship: develops_from PO:0000349 ! epidermal initial [Term] id: PO:0000146 name: abscission zone def: "Zone at base of leaf, flower, fruit, or other plant part that contains an abscission (or separation) layer and a protective layer, both involved in the abscission of the plant part." [ISBN:047124529] synonym: "abscission layer" RELATED [] is_a: PO:0009007 ! portion of plant tissue [Term] id: PO:0000191 name: synergid def: "Cell, usually two in number, in the micropylar end of the embryo sac of angiosperms associated with the egg in the egg apparatus." [ISBN:047125208, TAIR:ki] subset: reference xref: CL:0000288 is_a: PO:0025026 ! megagametophytic cell relationship: part_of PO:0020096 ! egg apparatus [Term] id: PO:0000198 name: free nuclear endosperm def: "An endosperm in which at least the first karyokinesis is not followed by cytokinesis." [ISBN:0080374913, ISBN:0471245194] synonym: "cenocytic endosperm" RELATED [] synonym: "coenocytic endosperm" RELATED [] synonym: "nuclear endosperm" RELATED [] is_a: PO:0009089 ! endosperm [Term] id: PO:0000199 name: cellular endosperm def: "Endosperm in which the first karyokinesis event is accompanied by cytokinesis." [ISBN:0080374913, ISBN:0471245194] is_a: PO:0009089 ! endosperm [Term] id: PO:0000200 name: micropylar endosperm def: "A portion of plant tissue that is the region of the endosperm closest to the micropyle of the seed." [TAIR:lr] synonym: "micropylar region" RELATED [] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0000201 name: chalazal cyst def: "A portion of plant tissue that is the part of the endosperm nearest the chalazal region of the ovule and forming a cyst-like structure." [ISBN:047124529, TAIR:lr] comment: Not in current literature. More like an attribute. synonym: "chalazal endosperm cyst" RELATED [] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0000207 name: nectary epidermis def: "A portion of shoot epidermis that is part of the nectary." [TAIR:lr] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0009035 ! nectary [Term] id: PO:0000223 name: shoot axis cortex def: "A portion of ground tissue that is part of a cortex and part of a shoot axis." [ISBN:047124529, POC:curators] comment: Can occur in a stem or branch. synonym: "branch cortex" NARROW [] synonym: "stem cortex" NARROW [] is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0005708 ! cortex relationship: part_of PO:0025029 ! shoot axis [Term] id: PO:0000224 name: central zone def: "An area of densely packed cells in the shoot apex that divide infrequently." [ISBN:0521288959, TAIR:lr] comment: Functions as a population of stem cells that replenishes the meristem. synonym: "central initiation zone" RELATED [] is_a: PO:0009013 ! meristem relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0000225 name: peripheral zone def: "Organogenic region of the meristem,  characterized by higher rates of cell division." [ISBN:0521288959, TAIR:lr] synonym: "peripheral meristem" RELATED [] is_a: PO:0009013 ! meristem relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0000226 name: rib zone def: "The region of the shoot apical meristem that lies below the central zone and is flanked by the peripheral zone." [ISBN:0521288959, TAIR:lr] synonym: "file meristem" RELATED [] is_a: PO:0009013 ! meristem relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0000229 name: floral meristem def: "A portion of meristem tissue that gives rise to the floral organs." [GR:pj] synonym: "floral apical meristem" RELATED [] is_a: PO:0009013 ! meristem relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0000230 name: inflorescence meristem def: "A meristem that gives rise to an inflorescence." [GR:pj] is_a: PO:0009013 ! meristem relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0000232 name: axillary bud meristem def: "A shoot meristem formed in the axil of the leaf." [TAIR:lr] synonym: "axillary meristem" RELATED [] is_a: PO:0006079 ! shoot meristem [Term] id: PO:0000244 name: functional megaspore def: "The megaspore(s) that forms the embryo sac." [TAIR:lr] xref: CL:0000433 is_a: PO:0020019 ! megaspore [Term] id: PO:0000245 name: degenerate megaspore def: "In monosporic and bisporic megasporogenesis: the megaspore(s) that would not participate in megagametogenesis." [TAIR:lr] xref: CL:0000475 is_a: PO:0020019 ! megaspore [Term] id: PO:0000252 name: endodermis alt_id: PO:0006064 def: "A portion of ground tissue that is the inner most layer of a cortex and has a casparian strip in its anticlinal cell walls." [ISBN:047124529, POC:curators] comment: Forms a sheath around the vascular system. It may have secondary walls later, part_of cortex. synonym: "endodermoid" RELATED [] xref: SGF:3016668 is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0005708 ! cortex [Term] id: PO:0000256 name: root hair def: "A root epidermal cell with a simple extension that is concerned with absorption of soil solution." [ISBN:0471245208] is_a: PO:0004013 ! epidermal cell relationship: develops_from PO:0000262 ! trichoblast relationship: part_of PO:0006036 ! root epidermis [Term] id: PO:0000258 name: root cortex alt_id: PO:0003010 def: "A portion of ground tissue that is part of a cortex and part of a root." [ISBN:047125208, POC:curators] comment: In dicots and gymnosperms, the cortex consists of mainly parenchyma cells. In monocots sclerenchyma develops in addition to parenchyma. is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0005708 ! cortex relationship: part_of PO:0009005 ! root [Term] id: PO:0000262 name: trichoblast def: "The smaller cell produced by the asymmetric division of a root epidermal cell that gives rise to a root hair." [ISBN:0471245208] synonym: "hair cell" RELATED [] xref: CL:0000299 is_a: PO:0004013 ! epidermal cell relationship: develops_from PO:0000349 ! epidermal initial relationship: part_of PO:0006036 ! root epidermis [Term] id: PO:0000263 name: atrichoblast def: "A cell formed after asymmetric division of root epidermal cell that does not give rise to a root hair." [ISBN:0387987819] synonym: "non-hair cell" RELATED [] xref: CL:0000332 is_a: PO:0004013 ! epidermal cell relationship: develops_from PO:0000349 ! epidermal initial relationship: part_of PO:0006036 ! root epidermis [Term] id: PO:0000272 name: protoxylem def: "A portion of xylem tissue composed of any of the first formed elements of the primary xylem." [ISBN:047125208] is_a: PO:0005352 ! xylem relationship: part_of PO:0005849 ! primary xylem [Term] id: PO:0000273 name: xylem element def: "A cell making up xylem tissue." [ISBN:0471245208] comment: Occurs in the sporophytic phase of a plant life cycle. xref: CL:0000298 is_a: PO:0000081 ! axial cell [Term] id: PO:0000274 name: xylem fiber def: "A fiber in xylem." [ISBN:0471245208] is_a: PO:0000273 ! xylem element relationship: part_of PO:0005848 ! secondary xylem [Term] id: PO:0000282 name: trichome def: "An outgrowth from the epidermis varying in size and complexity and including hairs, scales, and other structures; may be glandular." [ISBN:0471245208, TAIR:ki] comment: In Arabidopsis, patterning of trichome development is not random but does not appear to be lineage-based like stomata. xref: CL:0000282 is_a: PO:0004013 ! epidermal cell [Term] id: PO:0000283 name: idioblast def: "OBSOLETE. A cell in a tissue that markedly differs in form, size, or contents from other cells in the same tissue." [ISBN:0471245208] comment: This term was made obsolete because its a kind of attribute for a cell type. is_obsolete: true [Term] id: PO:0000284 name: subsidiary cell alt_id: PO:0000296 def: "An epidermal cell associated with a stoma and at least morphologically distinguishable from the other epidermal cells." [ISBN:047124520] synonym: "accessory cell" RELATED [] xref: CL:0000270 is_a: PO:0004013 ! epidermal cell relationship: part_of PO:0002000 ! stomatal complex [Term] id: PO:0000289 name: sieve tube member alt_id: PO:0000286 def: "One of the series of cells that make up a sieve tube; it shows a more or less pronounced differentiation between sieve plates (wide pores) and lateral sieve areas (narrow pores)." [ISBN:0471245208] comment: Also sieve tube element and the obsolete sieve tube segment. Occurs in the sporophytic phase of a plant life cycle. synonym: "sieve element" RELATED [] synonym: "sieve tube element" RELATED [] xref: CL:0000268 xref: CL:0000543 is_a: PO:0000081 ! axial cell relationship: part_of PO:0005043 ! secondary phloem relationship: part_of PO:0006075 ! primary phloem [Term] id: PO:0000290 name: tracheary element def: "General term for any water conducting cell, tracheid or vessel member." [ISBN:0471245208] comment: Occurs in the sporophytic phase of a plant life cycle. xref: CL:0000672 is_a: PO:0000273 ! xylem element relationship: part_of PO:0005848 ! secondary xylem relationship: part_of PO:0005849 ! primary xylem [Term] id: PO:0000293 name: guard cell def: "One of a pair of cells flanking the stomatal pore." [ISBN:0471245208] comment: They cause the opening and closing of the pore by changes in turgor. xref: CL:0000292 is_a: PO:0004013 ! epidermal cell relationship: develops_from PO:0000351 ! guard mother cell relationship: part_of PO:0002000 ! stomatal complex [Term] id: PO:0000295 name: cambial initial alt_id: PO:0000080 def: "Cell in the vascular or cork cambium which by periclinal divisions produce cells to the outside or inside of the cambial axis." [POC:curators] synonym: "cambial cell" RELATED [] xref: CL:0000272 is_a: PO:0004011 ! initial cell relationship: part_of PO:0005598 ! vascular cambium [Term] id: PO:0000301 name: tracheid def: "In the xylem, a dead elongated water-conducting cell in which at least the middle lamella of the end walls remains intact." [APWeb:Glossary] xref: CL:0000331 is_a: PO:0000290 ! tracheary element [Term] id: PO:0000309 name: nectary parenchyma def: "Relatively unspecialized tissue present in the nectary." [TAIR:lr] is_a: PO:0005421 ! parenchyma [Term] id: PO:0000332 name: pavement cell def: "Epidermal cell with characteristic sinuous anticlinal cell walls that overall give a jigsaw like appearance to the leaf epidermis." [ISBN:087694289] xref: CL:0000400 is_a: PO:0004013 ! epidermal cell relationship: develops_from PO:0000349 ! epidermal initial relationship: part_of PO:0000049 ! leaf lamina abaxial epidermis relationship: part_of PO:0000050 ! leaf lamina adaxial epidermis relationship: part_of PO:0006018 ! leaf adaxial epidermis relationship: part_of PO:0006019 ! leaf abaxial epidermis [Term] id: PO:0000349 name: epidermal initial def: "A relatively unspecialized cell that will give rise to specialized cell types of the epidermis." [TAIR:lr] xref: CL:0000538 is_a: PO:0004011 ! initial cell [Term] id: PO:0000351 name: guard mother cell def: "Epidermal cell that divides to produce the guard cells." [ISBN:0471245208] xref: CL:0000262 is_a: PO:0004013 ! epidermal cell relationship: develops_from PO:0000070 ! meristemoid relationship: develops_from PO:0000349 ! epidermal initial [Term] id: PO:0000352 name: myrosin cell def: "Cell containing glucosinolates (\"mustard oil glucosides\") and myrosinases, enzymes hydrolyzing the glucosinolates." [ISBN:0471245208] xref: CL:0000368 is_a: PO:0025030 ! ground tissue cell [Term] id: PO:0000353 name: passage cell def: "Cell in exodermis or endodermis that remains thin walled when the associated cells develop thick secondary walls." [ISBN:0471245208] xref: CL:0000245 is_a: PO:0025030 ! ground tissue cell [Term] id: PO:0000355 name: fiber tracheid def: "A fiber-like tracheid in the secondary xylem; commonly thick walled, with pointed ends and bordered pits that have lenticular to slit-like apertures." [ISBN:0471245208] xref: CL:0000258 is_a: PO:0000274 ! xylem fiber [Term] id: PO:0000372 name: metaxylem def: "A portion of xylem tissue that is part of the primary xylem and differentiates after the protoxylem and before the secondary xylem, if any of the latter is formed." [ISBN:047125208] is_a: PO:0005352 ! xylem relationship: part_of PO:0005849 ! primary xylem [Term] id: PO:0000373 name: mucilage cell def: "OBSOLETE. Cell containing mucilages or gums or similar carbohydrate material characterized by the property of swelling in water." [ISBN:0471245208] comment: Functional term is_obsolete: true [Term] id: PO:0000400 name: phloem mother cell def: "A cell derived from vascular cambium which is destined to differentiate into secondary phloem." [POC:curators] comment: Phloem islands can be formed in the middle of the xylem. xref: CL:0000264 is_a: PO:0000295 ! cambial initial relationship: part_of PO:0005043 ! secondary phloem [Term] id: PO:0000423 name: zygote def: "Diploid cell produced by the fusion of sperm cell nucleus and egg cell." [TAIR:ki] xref: CL:0000365 is_a: PO:0009002 ! plant cell [Term] id: PO:0000431 name: megasporocyte def: "A diploid (2n) cell that undergoes meiosis and produces four haploid (1n) megaspores." [ISBN:0471245208] synonym: "megaspore mother cell" RELATED [] synonym: "MMC" RELATED [] xref: CL:0000320 is_a: PO:0006204 ! sporocyte relationship: develops_from PO:0006015 ! female archesporial cell relationship: part_of PO:0020020 ! nucellus [Term] id: PO:0002000 name: stomatal complex def: "An opening pore on the epidermis of leaves and stems bordered by two guard cells and serving in gas exchange." [ISBN:0471245208] synonym: "stoma" RELATED [] synonym: "stomata" RELATED [] relationship: part_of PO:0000049 ! leaf lamina abaxial epidermis relationship: part_of PO:0000050 ! leaf lamina adaxial epidermis relationship: part_of PO:0000051 ! petiole epidermis relationship: part_of PO:0006018 ! leaf adaxial epidermis relationship: part_of PO:0006019 ! leaf abaxial epidermis [Term] id: PO:0002001 name: papillae def: "A soft protuberance on an epidermal cell of the stigma." [ISBN:0471245208] subset: reference relationship: part_of PO:0006061 ! stigma epidermis [Term] id: PO:0002002 name: basal cell def: "The lower-most cell formed after the first division of the zygote." [ISBN:0471245208] xref: CL:0000646 is_a: PO:0025028 ! embryonic cell relationship: develops_from PO:0000423 ! zygote relationship: part_of PO:0009009 ! embryo [Term] id: PO:0002003 name: vessel member def: "One of the cellular components of a vessel, a dead cell with the wall between adjacent members being variously perforated and the walls that persist variously thickened." [ISBN:0471245208] synonym: "vessel element" RELATED [] synonym: "vessel segment" RELATED [] is_a: PO:0000290 ! tracheary element [Term] id: PO:0002004 name: silk scar def: "The silk scar is composed of the shrivelled remains of the intercalary region of the silk, together with the base of the silk which is the true stylar tissue of the silk arising from the distal end of the developing kernel (caryopsis)." [GR:cwt6] is_a: PO:0008001 ! fruit distal end relationship: part_of PO:0009084 ! pericarp [Term] id: PO:0003000 name: transition zone def: "A region of the root between the meristem and the region of rapid elongation in which isodiametric growth (cell expansion) occurs." [Agricola:IND23249552, http://search.epnet.com/direct.asp?an=IND23249552&db=agr] subset: reference xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009005 ! root [Term] id: PO:0003003 name: primary root elongation zone def: "A zone of small, densely cytoplasmic cells that are dividing and expanding in size located behind the zone of cell division in the primary root." [TAIR:ki] is_a: PO:0020125 ! elongation zone relationship: part_of PO:0020127 ! primary root [Term] id: PO:0003004 name: haustorial root def: "OBSOLETE. The root of particular parasitic plants that becomes cemented to the host axis and intrudes into the tissues of the host." [http://www.botgard.ucla.edu/html/botanytextbooks/generalbotany/typesofroots/] comment: Term is specific for parasitic plants only. is_obsolete: true [Term] id: PO:0003005 name: nodal root alt_id: PO:0003008 alt_id: PO:0003009 def: "Adventitious root that forms at a shoot node." [http://www.botgard.ucla.edu/html/botanytextbooks/generalbotany/typesofroots/] subset: reference is_a: PO:0000042 ! shoot-borne root [Term] id: PO:0003011 name: root vascular system def: "A vascular system that is part of a root." [ISBN:0471245208, POC:curators] comment: This term was brought back from OBSOLETE node (original reason for OBSOLETE: synonym of term stele). Since stele encompasses both vascular system and the pith, in roots with pith, vascular system and stele are not synonymous. synonym: "root vein" RELATED [] is_a: PO:0000034 ! vascular system relationship: part_of PO:0020124 ! root stele [Term] id: PO:0003014 name: lateral root elongation zone def: "The portion of the lateral root located behind the zone of cell division that includes small, densely cytoplasmic cells that are dividing and expanding in size." [TAIR:ki] is_a: PO:0020125 ! elongation zone relationship: part_of PO:0020121 ! lateral root [Term] id: PO:0003015 name: primary root differentiation zone def: "A zone of cells that are differentiating into their final form and function located behind the elongation zone of the portion of the primary root." [TAIR:ki] is_a: PO:0020135 ! differentiation zone relationship: part_of PO:0020127 ! primary root [Term] id: PO:0003016 name: lateral root differentiation zone def: "The portion of the lateral root located behind the elongation zone containing cells that are differentiating into their final form and function." [TAIR:ki] is_a: PO:0020135 ! differentiation zone relationship: part_of PO:0020121 ! lateral root [Term] id: PO:0003017 name: root cap of the primary root def: "A group of cells that covers the apical meristem of the primary root." [TAIR:ki] is_a: PO:0020123 ! root cap relationship: part_of PO:0000026 ! primary root tip [Term] id: PO:0003018 name: root cap of the lateral root def: "A group of cells that covers the apical meristem of the lateral root." [TAIR:ki] is_a: PO:0020123 ! root cap relationship: part_of PO:0000027 ! lateral root tip [Term] id: PO:0003019 name: central root cap of the lateral root def: "The central part of a root cap of a lateral root in which the cells are arranged in longitudinal files." [TAIR:ki] is_a: PO:0020130 ! central root cap relationship: part_of PO:0003018 ! root cap of the lateral root [Term] id: PO:0003020 name: lateral root cap of the lateral root def: "In the lateral root, the part of the root cap that is parallel to the sides of the axis." [TAIR:ki] is_a: PO:0020131 ! lateral root cap relationship: part_of PO:0003018 ! root cap of the lateral root [Term] id: PO:0003021 name: central root cap of the primary root def: "The central part of a root cap of the primary root in which the cells are arranged in longitudinal files." [TAIR:ki] is_a: PO:0020130 ! central root cap relationship: part_of PO:0003017 ! root cap of the primary root [Term] id: PO:0003022 name: lateral root cap of the primary root def: "In the primary root, the part of the root cap that is parallel to the sides of the axis." [TAIR:ki] is_a: PO:0020131 ! lateral root cap relationship: part_of PO:0003017 ! root cap of the primary root [Term] id: PO:0003023 name: root nodule def: "Enlargement or swelling on the roots of plants, particularly in the Fabaceae, inhabited by nitrogen-fixing bacteria." [ISBN:0471245208] relationship: part_of PO:0009005 ! root [Term] id: PO:0003024 name: stolon def: "A branch that is slender, prostrate or trailing and above-ground and produces roots and sometimes erect shoots at its nodes." [APWeb:Glossary] subset: reference synonym: "runner" RELATED [] is_a: PO:0025073 ! branch [Term] id: PO:0004000 name: apical cell def: "The uppermost cell formed after the first division of the zygote." [ISBN:0471245208] is_a: PO:0025028 ! embryonic cell relationship: develops_from PO:0000423 ! zygote relationship: part_of PO:0009009 ! embryo [Term] id: PO:0004001 name: bulliform cell def: "An enlarged more or less thin-walled epidermal cell present, with other similar cells, in longitudinal rows in leaves of monocots." [ISBN:0471245208] comment: Also called motor cell because of its presumed participation in the mechanism of rolling and unrolling of leaves. synonym: "motor cell" RELATED [] is_a: PO:0004013 ! epidermal cell relationship: part_of PO:0006016 ! leaf epidermis [Term] id: PO:0004002 name: contact cell def: "OBSOLETE. An axial parenchyma or a ray cell physiologically associated with a tracheary element. Also a cell next to a stoma." [ISBN:0471245208] comment: Not used in current plant literature. is_obsolete: true [Term] id: PO:0004003 name: phellem alt_id: PO:0005049 def: "A portion of ground issue centrifugally derived from cork cambium, non-living at maturity, and having suberized walls." [ISBN:0471245208, POC:curators] comment: Protective in function because the walls are highly impervious to water. synonym: "cork" RELATED [] synonym: "phellem" RELATED [] is_a: PO:0025059 ! portion of ground tissue relationship: develops_from PO:0005599 ! cork cambium relationship: part_of PO:0005048 ! shoot axis periderm [Term] id: PO:0004004 name: epithelium cell def: "OBSOLETE. A compact layer of cells, often secretory in function, covering a free surface or lining a cavity." [ISBN:0471245208] comment: Functional term is_obsolete: true [Term] id: PO:0004005 name: laticiferous cell def: "OBSOLETE. A specialized cells or ducts resembling vessels; they form branched networks of latex-secreting cells in the phloem and other parts of plants." [http://academic.kellogg.edu/herbrandsonc/bio111/glossary/glossary.htm] comment: Obsoleted: Too general definition of the term. Replaced by two terms: non-articulated laticifer cell and articulated laticifer cell. is_obsolete: true [Term] id: PO:0004006 name: mesophyll cell def: "A chlorenchyma cell that is part of a mesophyll." [POC:curators, TAIR:ki] is_a: PO:0000076 ! chlorenchyma cell relationship: part_of PO:0006070 ! mesophyll [Term] id: PO:0004007 name: phelloid cell def: "OBSOLETE.  A cell within the phellem (cork) but distinct from the cork cell in having no suberin in its walls." [ISBN:0471245208] comment: Not used in current plant literature. Confusing definition. is_obsolete: true [Term] id: PO:0004008 name: photosynthetic cell def: "OBSOLETE. A chloroplast-containing cell engaged in photosynthesis." [ISBN:0471245208] comment: Functional characterization is not part of the criteria. is_obsolete: true [Term] id: PO:0004009 name: silica cell def: "Cells with deposits of silica in them. One of the two types of short cells in the epidermis of grasses and bamboos. It is usually paired with epidermal cork cell." [ISBN:0471245208] comment: One of two types of short cells in the epidermis of grasses. is_a: PO:0004718 ! short cell [Term] id: PO:0004010 name: meristematic cell def: "A cell synthesizing protoplasm and producing new cells by division and with only a primary cell wall." [ISBN:0471245208] xref: CL:0000685 is_a: PO:0009002 ! plant cell relationship: part_of PO:0009013 ! meristem [Term] id: PO:0004011 name: initial cell def: "Cell in a meristem that by division gives rise to two cells one of which remains in the meristem, the other is added to the plant body." [ISBN:0471245208] synonym: "stem cell" BROAD [] xref: CL:0000034 is_a: PO:0004010 ! meristematic cell [Term] id: PO:0004012 name: secretory cell def: "OBSOLETE. Cell that produces secreted substances." [TAIR:ki] comment: This is a functional term. is_obsolete: true [Term] id: PO:0004013 name: epidermal cell def: "Cell that constitutes dermal tissue." [TAIR:ki] xref: CL:0000362 is_a: PO:0009002 ! plant cell relationship: part_of PO:0005679 ! epidermis [Term] id: PO:0004509 name: secretory trichome def: "A  trichome that secretes or sequesters a substance." [POC:curators] xref: OBO_SF_PO:2916424 is_a: PO:0000282 ! trichome is_a: PO:0005656 ! portion of secretory tissue [Term] id: PO:0004510 name: non-secretory trichome def: "Trichome that does not have secretory function." [POC:curators] is_a: PO:0000282 ! trichome [Term] id: PO:0004511 name: seed hair def: "Trichome that develops from seed coat epidermis and is often long with putative dispersal function." [POC:curators] synonym: "seed trichome" RELATED [] is_a: PO:0000282 ! trichome relationship: part_of PO:0006048 ! seed coat epidermis relationship: part_of PO:0020061 ! coma [Term] id: PO:0004512 name: heartwood def: "The inner layers of secondary xylem that have largely ceased to function in storage and conduction and in which reserve materials have been removed or converted into heartwood substances; generally darker colored than the functioning sapwood." [ISBN:0471245208, POC:curators] is_a: PO:0005848 ! secondary xylem [Term] id: PO:0004513 name: sapwood def: "Outer part of the wood of stem or root containing living cells and reserves and in which conduction of water takes place. Generally lighter colored than the heartwood." [ISBN:0471245208, POC:curators] is_a: PO:0005848 ! secondary xylem [Term] id: PO:0004514 name: growth ring def: "A growth layer of secondary xylem or secondary phloem as seen in transection of stem or root; may be an annual ring or a false annual ring." [ISBN:0471245208, POC:curators] is_a: PO:0005848 ! secondary xylem [Term] id: PO:0004515 name: early wood def: "The wood formed in first part of a growth ring and characterized by a lower density and larger cells than the late wood." [ISBN:0471245208, POC:curators] synonym: "spring wood" RELATED [] is_a: PO:0004514 ! growth ring [Term] id: PO:0004516 name: late wood def: "The secondary xylem formed in the later part of a growth ring; denser and composed of smaller cells than the early wood." [POC:curators] synonym: "summer wood" RELATED [] is_a: PO:0004514 ! growth ring [Term] id: PO:0004517 name: growth ring boundary def: "Boundary between two growth rings." [POC:curators] is_a: PO:0004514 ! growth ring [Term] id: PO:0004518 name: bark def: "All tissues outside the vascular cambium or the xylem; in older trees may be divided into dead outer bark and living inner bark, which consists of secondary phloem." [POC:curators] is_a: PO:0009007 ! portion of plant tissue relationship: develops_from PO:0005043 ! secondary phloem [Term] id: PO:0004519 name: phloem fiber def: "A fiber in phloem." [POC:curators] is_a: PO:0000081 ! axial cell relationship: part_of PO:0005043 ! secondary phloem [Term] id: PO:0004520 name: libriform fiber def: "A xylem fiber commonly with thick walls and simple pits." [POC:curators] is_a: PO:0000274 ! xylem fiber [Term] id: PO:0004521 name: septate fiber def: "A fiber with thin transverse walls (septa), which are formed after the cell develops a secondary wall thickening." [POC:curators] is_a: PO:0000274 ! xylem fiber [Term] id: PO:0004522 name: outer vascular cambium def: "Cambium at the outer margin of the xylem cylinder." [POC:curators] is_a: PO:0005598 ! vascular cambium [Term] id: PO:0004523 name: included vascular cambium def: "Cambium occurring within xylem." [POC:curators] is_a: PO:0005598 ! vascular cambium [Term] id: PO:0004524 name: included phloem def: "A portion of phloem tissue produced by included vascular cambium." [POC:curators] is_a: PO:0005043 ! secondary phloem [Term] id: PO:0004525 name: wood parenchyma cell def: "Parenchyma cell occurring within secondary xylem." [POC:curators] is_a: PO:0000074 ! parenchyma cell [Term] id: PO:0004526 name: axial wood parenchyma cell def: "Parenchyma cell in the axial system of secondary xylem." [POC:curators] is_a: PO:0004525 ! wood parenchyma cell [Term] id: PO:0004527 name: ray wood parenchyma cell def: "Parenchyma cell of a ray in secondary xylem." [POC:curators] is_a: PO:0004525 ! wood parenchyma cell [Term] id: PO:0004528 name: upright wood ray parenchyma cell def: "Ray cell in secondary xylem oriented axially (vertically in the axis) with its longest dimension." [POC:curators] is_a: PO:0004527 ! ray wood parenchyma cell [Term] id: PO:0004529 name: procumbent wood ray parenchyma cell def: "Ray cell within secondary xylem having its longest axis in radial direction." [POC:curators] is_a: PO:0004527 ! ray wood parenchyma cell [Term] id: PO:0004530 name: tile  cell def: "Empty upright ray cell of approximately the same height as the procumbent ray cell and occurring in indeterminate horizontal series usually  interspersed among the procumbent cells." [POC:curators] is_a: PO:0004528 ! upright wood ray parenchyma cell [Term] id: PO:0004531 name: sheath cell def: "Cell on the margin of, and tending to form a sheath around, the procumbent cells of a multi-seriate ray as seen in tangential section." [POC:curators] xref: CL:0000618 is_a: PO:0004528 ! upright wood ray parenchyma cell [Term] id: PO:0004532 name: wood parenchyma def: "Parenchymatous tissue occurring in the wood." [POC:curators] is_a: PO:0005848 ! secondary xylem [Term] id: PO:0004533 name: axial wood parenchyma def: "Parenchyma tissue in the axial system of secondary xylem." [POC:curators] is_a: PO:0004532 ! wood parenchyma [Term] id: PO:0004534 name: ray wood parenchyma def: "Radially oriented parenchyma tissue in secondary xylem." [POC:curators] is_a: PO:0004532 ! wood parenchyma [Term] id: PO:0004535 name: fruit placenta def: "A placenta that is part of a fruit and to which seeds are attached." [POC:curators] subset: Tomato is_a: PO:0025078 ! placenta relationship: part_of PO:0009001 ! fruit [Term] id: PO:0004536 name: fruit pedicel def: "A pedicel that is part of an infructescence." [POC:curators] subset: Tomato xref: OBO_SF_PO:2903966 is_a: PO:0009052 ! pedicel relationship: part_of PO:0009001 ! fruit [Term] id: PO:0004537 name: adventitious embryo def: "Embryo derived directly from nucellus cells without involving embryo sac cells." [POC:curators] is_a: PO:0009009 ! embryo [Term] id: PO:0004538 name: indeterminate nodule def: "Nodule characterized by a persistent meristem, presence of vascular transfer cells, and cell division in the inner cortex with non-dividing infected cells and bacteria." [ISBN:1842460137, POC:curators] comment: Nodule is persistent and may continue to grow after a physiological stress. is_a: PO:0003023 ! root nodule [Term] id: PO:0004539 name: determinate nodule def: "Nodule characterized by a dividing infected cells and bacteria, vascular transfer cells absent and cell division is in the outer cortex." [POC:curators] comment: Nodules are not persistent. is_a: PO:0003023 ! root nodule [Term] id: PO:0004540 name: fruit columella def: "Central axis of the fruit." [POC:curators] subset: Tomato relationship: part_of PO:0009001 ! fruit [Term] id: PO:0004542 name: rhizome def: "A swollen shoot axis that grows horizontally at or below the substrate surface and produces shoots above and roots or rhizoids below." [POC:curators] comment: In ferns and many monocots, a rhizome is a primary axis (stem), while in other species, it is a branch. Usually produces scale-like leaves. subset: reference is_a: PO:0025029 ! shoot axis [Term] id: PO:0004543 name: tuber def: "A swollen or enlarged storage branch." [POC:curators] comment: Found in potatoes. subset: Potato subset: reference xref: OBO_SF_PO:3017726 is_a: PO:0025073 ! branch [Term] id: PO:0004544 name: root-borne shoot system def: "A shoot system that is initiated from a root." [POC:curators] synonym: "sucker shoot" RELATED [] is_a: PO:0009006 ! shoot system [Term] id: PO:0004545 name: shoot-borne shoot system def: "A shoot system that is initiated from a shoot." [POC:curators] subset: reference synonym: "branch" RELATED [] is_a: PO:0009006 ! shoot system [Term] id: PO:0004546 name: epicomic shoot def: "Shoot developing from a trunk." [POC:curators] is_a: PO:0004545 ! shoot-borne shoot system [Term] id: PO:0004547 name: subterranean tuber def: "A tuber that is below ground." [POC:curators] comment: This has nothing to do with the underground swollen storage organ of Ipomoea which is swollen. subset: Potato is_a: PO:0004543 ! tuber [Term] id: PO:0004548 name: aerial tuber def: "A tuber that is above ground." [POC:curators] is_a: PO:0004543 ! tuber [Term] id: PO:0004700 name: middle layer def: "Usually a single cell layer between tapetum and endothecium which almost invariably degenerates early during angiosperm anther  development and is eventually absorbed by adjacent cells." [POC:curators] subset: reference xref: OBO_SF_PO:2903966 is_a: PO:0009007 ! portion of plant tissue relationship: develops_from PO:0006008 ! inner secondary parietal cell layer relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0004701 name: short shoot def: "Shoot in which the internodes elongate little or at all, bearing reproductive structures and/or leaves." [APWeb:Glossary] synonym: "brachyblast" RELATED [] synonym: "bud spur" RELATED [] is_a: PO:0006343 ! axillary shoot [Term] id: PO:0004702 name: long shoot def: "Shoot in which all or most of the internodes elongate." [APWeb:Glossary] is_a: PO:0006343 ! axillary shoot [Term] id: PO:0004703 name: carpel primordium def: "The very first appearance of a carpel. It initiates from the carpel anlagen region of the floral meristem." [GR:pj, POC:curators] is_a: PO:0009030 ! carpel relationship: develops_from PO:0006005 ! carpel anlagen [Term] id: PO:0004704 name: sepal primordium def: "The very first appearance of a sepal." [POC:curators] is_a: PO:0009031 ! sepal [Term] id: PO:0004705 name: stamen primordium def: "The very first appearance of a stamen." [POC:curators] is_a: PO:0009029 ! stamen [Term] id: PO:0004706 name: flower primordium def: "The very first appearance of a flower." [POC:curators] is_a: PO:0009046 ! flower [Term] id: PO:0004707 name: fruit dehiscence zone def: "A narrow band of cells that extends along the dehiscent fruit's dehiscence region which upon fruit maturation by drying, undergoes cell separation. This allows the valves to detach from the replum and for the seeds to be dispersed." [GR:pj, TAIR:ki] comment: Found in dehiscent fruit. subset: Arabidopsis relationship: part_of PO:0009001 ! fruit [Term] id: PO:0004708 name: scutellar node def: "The region in the embryo between the primary root (enclosed in the coleorhiza) and the plumule (enclosed in the coleoptile) to which the scutellum is attached." [MaizeGDB:lv] is_a: PO:0005004 ! shoot node relationship: part_of PO:0009009 ! embryo [Term] id: PO:0004709 name: axillary bud def: "A bud that develops from an axillary bud meristem." [POC:curators] subset: reference xref: OBO_SF_PO:3016634 is_a: PO:0000055 ! bud [Term] id: PO:0004710 name: axillary floral bud def: "An axillary bud that develops into a flower." [POC:curators] is_a: PO:0000056 ! floral bud is_a: PO:0025072 ! axillary reproductive bud [Term] id: PO:0004711 name: axillary inflorescence bud def: "An axillary reproductive bud that develops into an inflorescence." [POC:curators] xref: OBO_SF_PO:3020771 is_a: PO:0000057 ! inflorescence bud is_a: PO:0025072 ! axillary reproductive bud [Term] id: PO:0004712 name: axillary vegetative bud def: "An axillary bud that develops into a long or short shoot or a leaf." [POC:curators] xref: OBO_SF_PO:3020771 is_a: PO:0000058 ! vegetative bud is_a: PO:0004709 ! axillary bud [Term] id: PO:0004713 name: terminal bud def: "A bud that develops from a shoot apical meristem." [POC:curators] subset: reference xref: OBO_SF_PO:3016634 is_a: PO:0000055 ! bud [Term] id: PO:0004714 name: terminal floral bud def: "A terminal bud that develops into a flower." [POC:curators] is_a: PO:0000056 ! floral bud is_a: PO:0025071 ! terminal reproductive bud [Term] id: PO:0004715 name: terminal inflorescence bud def: "A terminal reproductive bud develops into an inflorescence." [POC:curators] is_a: PO:0000057 ! inflorescence bud is_a: PO:0025071 ! terminal reproductive bud [Term] id: PO:0004716 name: terminal vegetative bud def: "A terminal bud that develops into a long or short shoot." [POC:curators] is_a: PO:0000058 ! vegetative bud is_a: PO:0004713 ! terminal bud [Term] id: PO:0004717 name: long cell def: "A more or less rectangular epidermal cell in which the proximo-distal dimension is several times longer than the transverse dimension." [POC:curators] comment: The leaf epidermis of Poaceae and Joinvilleaceae, long cells and short cells often alternate in longitudinal rows. is_a: PO:0004013 ! epidermal cell [Term] id: PO:0004718 name: short cell def: "An isodiametric epidermal cell." [POC:curators] comment: The leaf epidermis of Poaceae and Joinvilleaceae, long cells and short cells often alternate in longitudinal rows. is_a: PO:0004013 ! epidermal cell [Term] id: PO:0004719 name: hilum groove def: "Longitudinal groove in the testa through the prominent hilum of the seed." [POC:curators] synonym: "faboid split" RELATED [] relationship: part_of PO:0009010 ! seed [Term] id: PO:0004720 name: paraclade def: "A lateral branch that ends in an inflorescence that repeats the main inflorescence." [APWeb:Glossary, ISBN:0521251346] is_a: PO:0025073 ! branch [Term] id: PO:0004721 name: paraclade cortex def: "A portion of ground tissue that is part of a cortex and part of a paraclade." [POC:curators, TAIR:ki] xref: OBO_SF_PO:2903966 is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0004720 ! paraclade relationship: part_of PO:0005708 ! cortex [Term] id: PO:0004722 name: pedicel cortex def: "A portion of ground tissue that is part of a cortex and part of a pedicel." [POC:curators, TAIR:ki] is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0005708 ! cortex relationship: part_of PO:0009052 ! pedicel [Term] id: PO:0004723 name: sepal vascular system def: "Total of the vascular tissues in their specific arrangement in the sepal." [TAIR:ki] is_a: PO:0005017 ! flower vascular system relationship: part_of PO:0009031 ! sepal [Term] id: PO:0004724 name: hypocotyl-root junction def: "Junction point of the embryonic root and hypocotyl." [TAIR:ki] subset: reference relationship: part_of PO:0009006 ! shoot system relationship: part_of PO:0019018 ! embryo axis [Term] id: PO:0004725 name: abaxial side of leaf primordium def: "The abaxial/outer side of the leaf primordium that becomes the abaxial/lower leaf blade." [TAIR:ki] relationship: part_of PO:0000017 ! leaf primordium [Term] id: PO:0004726 name: adaxial side of leaf primordium def: "The adaxial/inner side of the leaf primordium that becomes adaxial/upper leaf blade." [TAIR:ki] relationship: part_of PO:0000017 ! leaf primordium [Term] id: PO:0005001 name: basal axillary shoot def: "A branch that forms from a leaf at the very base of the shoot." [GR:ap] synonym: "basal axillary branch" RELATED [] synonym: "ratoon" RELATED [] synonym: "tiller" RELATED [] is_a: PO:0006343 ! axillary shoot [Term] id: PO:0005002 name: cauline axillary shoot def: "An axillary branch that forms from a leaf above the very base of the shoot." [GR:ap] comment: The genetic distinction between cauline axillary branches and tillers may or may not be unique to the Poaceae. There are no data for other plant families. synonym: "cauline axillary branch" RELATED [] is_a: PO:0006343 ! axillary shoot [Term] id: PO:0005003 name: shoot axis trichome def: "Trichome on/from the epidermis of the shoot axis." [PMID:17217456, TAIR:donghui] comment: Can occur on a stem or branch. synonym: "branch trichome" NARROW [] synonym: "stem trichome" NARROW [] is_a: PO:0000282 ! trichome relationship: part_of PO:0000112 ! shoot axis epidermis [Term] id: PO:0005004 name: shoot node def: "A cardinal organ part of a shoot axis where one or more spikelet, flower, floret, branch, bud, or leaf may arise." [GR:pj, POC:curators] subset: reference is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0025029 ! shoot axis [Term] id: PO:0005005 name: shoot internode def: "A cardinal organ part of a shoot axis between two nodes of the axis." [GR:pj, POC:curators] subset: Potato subset: reference is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0025029 ! shoot axis [Term] id: PO:0005006 name: articulated laticifer def: "A structure consisting of long multinucleate tubes in which latex is found, having cross walls (articulated)." [APWeb:Glossary, GR:pj] is_a: PO:0005053 ! laticifer [Term] id: PO:0005007 name: non-articulated laticifer def: "A structure consisting of long multinucleate tubes in which latex is found, having no cross walls." [APWeb:Glossary, GR:pj] is_a: PO:0005053 ! laticifer [Term] id: PO:0005008 name: fruit septum def: "A thin partition or membrane that divides a cavity or a mass of tissue in the fruit that is derived from the carpel septum." [GR:cwt] subset: Arabidopsis is_a: PO:0000030 ! septum relationship: develops_from PO:0005009 ! carpel septum relationship: part_of PO:0009001 ! fruit [Term] id: PO:0005009 name: carpel septum def: "A thin partition or membrane that divides multilocular ovary. Often found in species with syncarpous (multiple carpels fused) pistil." [GR:cwt, GR:pj] subset: Arabidopsis is_a: PO:0000030 ! septum relationship: part_of PO:0009030 ! carpel [Term] id: PO:0005010 name: anther septum def: "A thin partition or stretch of cells that are present in the anther dehiscence zone." [GR:cwt, GR:pj] is_a: PO:0000030 ! septum relationship: part_of PO:0005011 ! anther dehiscence zone [Term] id: PO:0005011 name: anther dehiscence zone def: "A narrow band of cells that extends along the entire length of the anther. This site is observed as an indentation between the locules of each theca. Upon anther maturation, cell separation within the dehiscence zone allows the anther wall to break and for pollen to be released." [PMID:15319479] relationship: part_of PO:0009066 ! anther [Term] id: PO:0005012 name: pedicel vascular system def: "Total of the vascular tissues in their specific arrangement in the pedicel." [PMID:17217456, TAIR:donghui] is_a: PO:0000034 ! vascular system relationship: part_of PO:0009052 ! pedicel [Term] id: PO:0005013 name: hypocotyl epidermis def: "The outermost primary cell layer of the hypocotyl." [PMID:15368128, TAIR:donghui] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0020100 ! hypocotyl [Term] id: PO:0005014 name: embryo cortex def: "A cortex that is part of the embryo." [PMID:16543410, POC:curators, TAIR:donghui] comment: Can occur in the hypocotyl and root. is_a: PO:0005708 ! cortex relationship: part_of PO:0009009 ! embryo [Term] id: PO:0005015 name: embryo endodermis def: "A portion of endodermis that is part of an embryo." [PMID:16543410] is_a: PO:0000252 ! endodermis relationship: part_of PO:0009009 ! embryo [Term] id: PO:0005016 name: replum def: "A false septum formed by the ingrowth from the placenta of an ovary rather than from the carpel walls. This is formed post fertilization." [GR:pj, PMID:13678595, PMID:15035986] is_a: PO:0009007 ! portion of plant tissue relationship: develops_from PO:0020001 ! ovary placenta relationship: part_of PO:0009001 ! fruit [Term] id: PO:0005017 name: flower vascular system def: "Total of the vascular tissues in their specific arrangement in the flower and its parts." [GR:pj] is_a: PO:0000034 ! vascular system relationship: part_of PO:0009046 ! flower [Term] id: PO:0005018 name: stamen vascular system def: "Total of the vascular tissues in their specific arrangement in the stamen." [GR:pj] is_a: PO:0005017 ! flower vascular system relationship: part_of PO:0009029 ! stamen [Term] id: PO:0005019 name: carpel vascular system def: "Total of the vascular tissues in their specific arrangement in the carpel." [GR:pj] is_a: PO:0005017 ! flower vascular system relationship: part_of PO:0009030 ! carpel [Term] id: PO:0005020 name: vascular bundle def: "A unit strand of the vascular system containing the vascular tissues, xylem and phloem. In addition vascular cambium is often present." [GR:pj] comment: May also contain portions of ground tissue. subset: Maize is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0000034 ! vascular system [Term] id: PO:0005021 name: sepal margin def: "The margin of a sepal." [PMID:15269176, TAIR:donghui] is_a: PO:0025018 ! phyllome margin relationship: part_of PO:0009031 ! sepal [Term] id: PO:0005022 name: ovary wall def: "A wall of an ovary that is composed of abaxial (outer) and adaxial (inner) epidermis and a middle layer,  composed of mesophyll cells and a distinct subepidermal adaxial cell layer (as found in Arabidopsis)." [GR:pj, PMID:10332605] synonym: "valve (sensu Brassicaceae)" RELATED [] is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009072 ! ovary [Term] id: PO:0005023 name: abaxial epidermis of ovary def: "The epidermal cell layer of the abaxial/outer surface of the ovary." [GR:pj] is_a: PO:0006063 ! ovary epidermis [Term] id: PO:0005024 name: adaxial epidermis of ovary def: "The epidermal cell layer of the adaxial/inner surface of the ovary." [GR:pj] is_a: PO:0006063 ! ovary epidermis [Term] id: PO:0005025 name: middle layer of ovary wall def: "A portion of chlorencyma tissue that is composed of one or more mesophyll layers. It may have a distinct subepidermal adaxial cell layer (as found in Arabidopsis)." [GR:pj, PMID:10332605] comment: The cells in the mesophyll layer(s) may not differentiate similar to the spongy and palisade cells found in the leaf mesophyll. subset: Poaceae xref: OBO_SF_PO:2903966 is_a: PO:0005426 ! chlorenchyma relationship: part_of PO:0005022 ! ovary wall [Term] id: PO:0005026 name: root giant cell def: "Multinucleate cell developed by a series of events involving kayokinesis but not cytokinesis of the initial feeding cell. The events are induced by root knot nematodes (e.g., Meloidogyne sp. ) entering the feeding cells (any cells) of the root vascular system." [GR:pj, PMID:15053756] subset: Arabidopsis is_a: PO:0025030 ! ground tissue cell relationship: part_of PO:0003011 ! root vascular system [Term] id: PO:0005027 name: root syncytium cell def: "Multinucleate cell developed by a series of events involving fusion with the neighboring dividing cells. The events are induced by cyst nematodes (e.g. Heterodera schachtii) entering the feeding cells (any cells) of the root vascular system." [GR:pj, PMID:15053756] subset: Arabidopsis is_a: PO:0025030 ! ground tissue cell relationship: part_of PO:0003011 ! root vascular system [Term] id: PO:0005028 name: inflorescence vascular system def: "Total of the vascular tissues in their specific arrangement in the inflorescence." [GR:pj] is_a: PO:0000034 ! vascular system relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0005029 name: root primordium def: "An organized group of cells that will differentiate into a new root." [GR:pj] is_a: PO:0009005 ! root [Term] id: PO:0005039 name: primary thickening meristem def: "A meristem that develops from a peripheral zone of a shoot apical meristem and is responsible for the primary increase in thickness of a shoot axis." [ISSN:0669014893] comment: May appear as a distinct mantle like zone. Often found in monocotyledons. is_a: PO:0009013 ! meristem relationship: develops_from PO:0000225 ! peripheral zone relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0005040 name: root pith def: "A portion of pith that is part of a root." [ISBN:0080280307] is_a: PO:0006109 ! pith relationship: part_of PO:0020124 ! root stele [Term] id: PO:0005041 name: shoot axis pith def: "A portion of pith that is part of a shoot axis." [ISBN:0080280307] comment: Can occur in a stem or branch. synonym: "branch pith" NARROW [] synonym: "stem pith" NARROW [] is_a: PO:0006109 ! pith relationship: part_of PO:0025029 ! shoot axis [Term] id: PO:0005043 name: secondary phloem def: "A portion of phloem tissue formed by the activity of the vascular cambium." [ISBN:0122151704] comment: Part of the bark. is_a: PO:0005417 ! phloem [Term] id: PO:0005046 name: periderm def: "A peripheral portion of ground tissue in a plant axis that is composed of phellogen, phellem, and phelloderm." [ISBN:047124529, POC:curators] comment: May replace the epidermis in stems and roots, rarely in other organs. In some cases, the epidermis is retained after periderm development. Periderm is derived from lateral meristerm and may contain secondary phloem. xref: OBO_SF_PO:3008013 is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0025004 ! plant axis [Term] id: PO:0005047 name: root periderm def: "A portion of periderm that is part of a root." [POC:curators] xref: OBO_SF_PO:3008032 is_a: PO:0005046 ! periderm relationship: part_of PO:0009005 ! root [Term] id: PO:0005048 name: shoot axis periderm def: "A portion of periderm that is part of a shoot axis." [POC:curators] comment: Can occur on a stem or branch. synonym: "branch periderm" NARROW [] synonym: "stem periderm" NARROW [] xref: OBO_SF_PO:3008032 is_a: PO:0005046 ! periderm relationship: part_of PO:0004518 ! bark relationship: part_of PO:0025029 ! shoot axis [Term] id: PO:0005050 name: phelloderm def: "A portion of ground tissue often resembling cortical parenchyma produced centripetally by the cork cambium." [ISBN:0080374913] subset: Rice is_a: PO:0025059 ! portion of ground tissue relationship: develops_from PO:0005599 ! cork cambium relationship: part_of PO:0005048 ! shoot axis periderm [Term] id: PO:0005051 name: hypodermis def: "A portion of ground tissue that is the outermost layer of a portion of cortex." [POC:curators] comment: A layer or layers of cells beneath the epidermis that is distinct in appearance from adjacent tissues. xref: OBO_SF_PO:3016668 is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0005708 ! cortex [Term] id: PO:0005052 name: callus def: "A tissue formed as a result of wounding, or a tissue developing in a tissue culture." [GR:pj] is_a: PO:0005421 ! parenchyma [Term] id: PO:0005053 name: laticifer def: "A secretory structure that produces latex." [ISBN:0080374913] is_a: PO:0005656 ! portion of secretory tissue [Term] id: PO:0005057 name: shoot axis hypodermis def: "A portion of hypodermis that is part of a shoot axis cortex." [ISBN:0080374913, POC:curators] comment: Can occur in a stem or branch. synonym: "branch hypodermis" NARROW [] synonym: "stem hypodermis" NARROW [] is_a: PO:0005051 ! hypodermis relationship: part_of PO:0000223 ! shoot axis cortex [Term] id: PO:0005058 name: shoot axis endodermis def: "A portion of endodermis that is part of a shoot axis cortex." [POC:curators] comment: Can occur in a stem or branch. synonym: "branch endodermis" NARROW [] synonym: "stem endodermis" NARROW [] is_a: PO:0000252 ! endodermis relationship: part_of PO:0000223 ! shoot axis cortex [Term] id: PO:0005059 name: root endodermis def: "A portion of endodermis that is part of a root cortex." [GR:pj] is_a: PO:0000252 ! endodermis relationship: part_of PO:0000258 ! root cortex [Term] id: PO:0005060 name: leaf endodermis def: "A portion of endodermis that is part of a leaf." [POC:curators] comment: Often found in the leaf of Gymnosperms and elsewhere. is_a: PO:0000252 ! endodermis relationship: part_of PO:0025034 ! leaf [Term] id: PO:0005349 name: schizo-lysigenous aerenchyma def: "OBSOLETE. Aerenchyma, originating by a combination of two processes, separation and degradation of cell walls." [GR:pj, ISBN:0080374913] comment: The term was made obsolete because schizo-lysigenous form is an attribute of regular aerenchyma. is_obsolete: true [Term] id: PO:0005352 name: xylem def: "A portion of vascular tissue composed of xylem elements." [GR:pj] comment: The principal function is the upward translocation of water and solutes. See also primary xylem and secondary xylem. is_a: PO:0009015 ! portion of vascular tissue [Term] id: PO:0005360 name: aleurone layer def: "A portion of plant tissue that is the outermost layer of endosperm in a seed, its cells being characterized by presence of protein bodies containing seed storage proteins." [GR:pj, ISBN:0080374913] xref: OBO_SF_PO:2903966 is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0005415 name: endosperm parenchyma def: "A portion of seed storage parenchyma that is part of an endopserm." [ISBN:0080374913, POC:curators] comment: Often devoid of intercellular spaces. is_a: PO:0025067 ! seed storage parenchyma relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0005417 name: phloem def: "A portion of vascular tissue whose principal function is conducting organic substances." [GR:pj] is_a: PO:0009015 ! portion of vascular tissue [Term] id: PO:0005421 name: parenchyma def: "A portion of ground tissue composed of polyhedral cells typically with thin, non-lignified cellulosic cell walls and nucleate living protoplasts." [POC:curators] comment: Parenchyma contains relatively unspecialized cells. synonym: "portion of parenchyma tissue" EXACT [] xref: OBO_SF_PO:3007987 is_a: PO:0025059 ! portion of ground tissue [Term] id: PO:0005423 name: collenchyma def: "Living tissue composed of more or less elongated cells with thick nonlignified primary cell walls." [GR:pj] synonym: "supporting tissue" RELATED [] is_a: PO:0025059 ! portion of ground tissue [Term] id: PO:0005426 name: chlorenchyma def: "Chloroplast-containing parenchyma tissue." [ISBN:0080374913] synonym: "portion of chlorenchyma tissue" EXACT [] is_a: PO:0005421 ! parenchyma [Term] id: PO:0005427 name: sclerenchyma def: "A supporting tissue composed of fibers or sclereids." [ISBN:0080374913] is_a: PO:0025059 ! portion of ground tissue [Term] id: PO:0005597 name: cambium def: "A lateral meristem, the cells of which divide mostly periclinally." [ISBN:0080374913] is_a: PO:0020145 ! lateral meristem [Term] id: PO:0005598 name: vascular cambium def: "A lateral meristem, the cells of which give rise to secondary xylem and phloem, leading to an increase in girth." [GR:pj] is_a: PO:0005597 ! cambium relationship: part_of PO:0005020 ! vascular bundle [Term] id: PO:0005599 name: cork cambium def: "Lateral meristem which produces the phellem (cork) and the phelloderm." [ISBN:0080374913] synonym: "phellogen" RELATED [] is_a: PO:0005597 ! cambium relationship: part_of PO:0005048 ! shoot axis periderm [Term] id: PO:0005621 name: angular collenchyma def: "OBSOLETE. A form of collenchyma in which the primary wall thickening is most prominent in the angles where three or more cells are joined." [GR:pj, ISBN:0080374913] comment: The term was made obsolete because angular form is a common attribute of ordinary collenchyma. is_obsolete: true [Term] id: PO:0005632 name: lacunar collenchyma def: "OBSOLETE. A collenchyma characterized by intercellular spaces and cell wall thickenings facing the intercellular spaces." [GR:pj, ISBN:0080374913] comment: The term was made obsolete because the lacunar form is an attribute of regular collenchyma. is_obsolete: true [Term] id: PO:0005633 name: lamellar collenchyma def: "OBSOLETE. A collenchyma in which cell wall thickenings are deposited mainly on tangential walls." [GR:pj, ISBN:0080374913] comment: The term was made obsolete because lamellar form is an attribute of regular collenchyma. synonym: "plate collenchyma" RELATED [] synonym: "tangential collenchyma" RELATED [] is_obsolete: true [Term] id: PO:0005645 name: leaf mesophyll def: "The chloroplast-containing, photosynthetic parenchymatous tissue situated between the two epidermal layers of the foliage leaf." [GR:pj, ISBN:0080374913] synonym: "foliage leaf mesophyll" RELATED [] synonym: "leaf parenchyma" RELATED [] is_a: PO:0006070 ! mesophyll relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0005647 name: spongy mesophyll def: "Leaf mesophyll parenchyma characterized by little elongated cells, that are not closely packed and have conspicuous intercellular spaces." [GR:pj, ISBN:0080374913] synonym: "spongy parenchyma" RELATED [] is_a: PO:0006070 ! mesophyll relationship: part_of PO:0005645 ! leaf mesophyll [Term] id: PO:0005648 name: palisade mesophyll def: "Parenchyma containing closely packed elongated chlorenchymatous cells oriented perpendicular to the leaf surface and which are active in photosynthesis." [GR:pj, ISBN:0080374913] synonym: "palisade parenchyma" RELATED [] is_a: PO:0006070 ! mesophyll relationship: part_of PO:0005645 ! leaf mesophyll [Term] id: PO:0005656 name: portion of secretory tissue def: "Tissues that form specialized structures producing a secretion." [GR:pj, ISBN:047124529] comment: The synonym gland does not imply non-secretory 'glands'. synonym: "gland" RELATED [] is_a: PO:0009007 ! portion of plant tissue [Term] id: PO:0005660 name: hydathode def: "A structural modification of vascular and non-vascular tissues, usually in a leaf, that permits the release of water through a pore in the epidermis." [GR:pj, ISBN:0080374913] is_a: PO:0005656 ! portion of secretory tissue is_a: PO:0009015 ! portion of vascular tissue [Term] id: PO:0005661 name: salt gland def: "A specialized tissue where excess salt absorbed in water from the soil is concentrated, being stores or excreted." [GR:pj] comment: A crust of salt forms on leaves which tastes bad and the white surfaces act to reflect light. Example, as is Mangrove vegetation. is_a: PO:0005656 ! portion of secretory tissue [Term] id: PO:0005665 name: resin canal def: "A duct of schizogenous origin lined with resin-secreting cells and containing resin." [GR:pj, ISBN:0080374913] synonym: "resin duct" RELATED [] is_a: PO:0005656 ! portion of secretory tissue [Term] id: PO:0005669 name: oil gland def: "A gland or a cavity lined with cells that secrete oils." [GR:pj] comment: Oil glands are schizogenous. synonym: "oil cavity" RELATED [] is_a: PO:0005656 ! portion of secretory tissue [Term] id: PO:0005679 name: epidermis def: "A portion of plant tissue composed of epidermal cells that develops from the protoderm and covers the surface of a plant structure." [POC:curators] comment: The epidermis can be composed of one or more layers of cells. In some species, the epidermis is replaced by periderm. synonym: "dermal tissue" EXACT [] synonym: "epidermal layer" EXACT [] synonym: "multiseriate epidermis" RELATED [] xref: OBO_SF_PO:3008011 is_a: PO:0009007 ! portion of plant tissue relationship: develops_from PO:0006210 ! protoderm [Term] id: PO:0005702 name: aerenchyma def: "A portion of parenchyma tissue containing particularly large intercellular spaces of schizogenous or lysigenous origin." [GR:pj, ISBN:0080374913] comment: As applied to an intercellular space, originating by one or a combination of two processes, separation and degradation of cell walls. synonym: "portion of aerenchyma tissue" RELATED [] is_a: PO:0005421 ! parenchyma [Term] id: PO:0005704 name: rhexigenous aerenchyma def: "OBSOLETE. Aerenchyma originating by rupture of cells." [GR:pj, ISBN:0080374913] comment: The term was made obsolete because rhexigenous form is an attribute of regular aerenchyma. is_obsolete: true [Term] id: PO:0005706 name: lysigenous aerenchyma def: "OBSOLETE. Aerenchyma originating by dissolution of cells." [GR:pj, ISBN:0080374913] comment: The term was made obsolete because lysigenous form is an attribute of regular aerenchyma. is_obsolete: true [Term] id: PO:0005708 name: cortex def: "A maximal portion of ground tissue between the vascular system and the epidermis in a plant." [POC:curators] xref: OBO_SF_PO:3011071 is_a: PO:0025059 ! portion of ground tissue [Term] id: PO:0005752 name: promeristem def: "OBSOLETE. Meristematic tissue consisting of apical initials, together with cells derived from them and which are still close to the initial." [GR:pj, ISBN:0080374913] is_obsolete: true [Term] id: PO:0005772 name: exodermis def: "The sub-epidermal layer or layers of cells of the root similar in structure and cytochemical characteristics of  the endodermis, the outermost layer or layers of cells of the cortex." [GR:pj, ISBN:0080374913] comment: The cell walls are thickened and contain suberin. Absent in pteridophytes, fibrous in Phoenix and accompanied by sclerenchyma in Ananas. synonym: "root hypodermis" RELATED [] is_a: PO:0005051 ! hypodermis relationship: part_of PO:0000258 ! root cortex [Term] id: PO:0005848 name: secondary xylem def: "A portion of xylem tissue that develops from a vascular cambium." [ISBN:0471245194, POC:curators] comment: Absent in some dicots and most monocots. The "wood" of gymnosperm and dicot angiosperm trees, shrubs, and lianas. synonym: "wood" EXACT [] is_a: PO:0005352 ! xylem relationship: develops_from PO:0005598 ! vascular cambium [Term] id: PO:0005849 name: primary xylem def: "A portion of xylem tissue of the primary plant body." [GR:pj, ISBN:0122151704, ISBN:0471245194] comment: In stem or root it is differentiated behind the apical meristem. is_a: PO:0005352 ! xylem [Term] id: PO:0006000 name: hull (sensu Poaceae) def: "A leaf like structure often found enclosing the grass fruit, caryopsis. It is derived from the dried lemma (PO:0009037) and palea (PO:0009038) floral bracts found in the grass floret (PO:0006318)." [GR:pj] subset: Maize subset: Poaceae subset: Rice relationship: develops_from PO:0009037 ! lemma relationship: develops_from PO:0009038 ! palea relationship: part_of PO:0006342 ! infructescence [Term] id: PO:0006001 name: phyllome def: "A lateral plant organ produced by a shoot apical meristem." [POC:curators] subset: reference is_a: PO:0009008 ! plant organ relationship: part_of PO:0009006 ! shoot system [Term] id: PO:0006002 name: lower glume alt_id: PO:0006027 alt_id: PO:0006031 def: "The proximal/basal of the two glumes." [GR:pj] synonym: "lower empty glume" RELATED [] synonym: "lower rudimentary glume" RELATED [] synonym: "outer empty glume" RELATED [] synonym: "outer glume" RELATED [] synonym: "outer rudimentary glume" RELATED [] is_a: PO:0009039 ! glume [Term] id: PO:0006003 name: scale leaf def: "A reduced and more or less non-photosynthetic leaf, often associated with a vegetatively propagating organ such as a rhizome or perennating bud." [ISBN:0080374913] comment: Sometimes referring specifically to such leaves on a seedling. subset: reference synonym: "cataphyll" RELATED [] is_a: PO:0006001 ! phyllome [Term] id: PO:0006004 name: upper glume alt_id: PO:0006028 alt_id: PO:0006030 def: "The apical/distal of the two glumes." [GR:pj] synonym: "inner empty glume" RELATED [] synonym: "inner glume" RELATED [] synonym: "inner rudimentary glume" RELATED [] synonym: "upper empty glume" RELATED [] synonym: "upper rudimentary glume" RELATED [] is_a: PO:0009039 ! glume [Term] id: PO:0006005 name: carpel anlagen def: "A portion of meristem tissue that is a presumptive region on a floral meristem where carpel primordia would initiate." [PMID:14729915] is_a: PO:0009013 ! meristem relationship: part_of PO:0000229 ! floral meristem [Term] id: PO:0006006 name: primary parietal cell layer def: "A primary parietal cell and adjacent cells." [GR:pj, PMID:2476454] subset: reference is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0006007 name: secondary parietal cell layer def: "The cells of the primary parietal cell layer undergo a periclinal division resulting in the formation of the two secondary parietal layers." [GR:pj, PMID:2476454] subset: reference is_a: PO:0009007 ! portion of plant tissue relationship: develops_from PO:0006006 ! primary parietal cell layer relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0006008 name: inner secondary parietal cell layer def: "One of the secondary parietal layer formed towards inner side after the cells of the primary parietal cell layer undergo a periclinal division. It divides periclinally to form the middle layer externally and the tapetum internally." [GR:pj, PMID:2476454] is_a: PO:0006007 ! secondary parietal cell layer [Term] id: PO:0006009 name: outer secondary parietal cell layer def: "One of the secondary parietal layer formed towards outside after the cells of the primary parietal cell layer undergo a periclinal division. It differentiates into the endothecium." [GR:pj, PMID:2476454] is_a: PO:0006007 ! secondary parietal cell layer [Term] id: PO:0006010 name: primary parietal cell def: "It is formed by the division of a archesporial cell." [PMID:2476454] is_a: PO:0009002 ! plant cell relationship: develops_from PO:0006014 ! male archesporial cell relationship: part_of PO:0006006 ! primary parietal cell layer [Term] id: PO:0006011 name: lateral vein def: "An unbranched second order vein of the grass leaf blade." [GR:pj] is_a: PO:0020140 ! secondary vein [Term] id: PO:0006012 name: leaf collar def: "A thin band of intercalary meristematic tissue at the junction of a leaf blade (lamina) and a leaf sheath found in grasses." [GR:pj, ISBN:0080374913] is_a: PO:0009013 ! meristem relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0006013 name: juice sac def: "As found in citrus the mature juice sac is a swollen sac with a slender stalk and a sac wall lined with layers of tightly arranged cells. It develops from a single cell of the endocarp. Endocarp develops from the carpellary inner epidermis." [GR:pj, web:http\://www.chineseplantscience.com/earticle_read.asp?id=12171] subset: Citrus synonym: "juice vesicle" RELATED [] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009086 ! endocarp [Term] id: PO:0006014 name: male archesporial cell def: "It undergoes periclinal divisions, giving rise to an inner primary sporogenous cell (PSC) layer and an outer primary parietal cell (PPC)." [GR:pj, PMID:10465788] synonym: "anther archesporial cell" RELATED [] synonym: "male archesporial initial" RELATED [] is_a: PO:0009002 ! plant cell relationship: part_of PO:0006089 ! anther primordium [Term] id: PO:0006015 name: female archesporial cell def: "In the majority of flowering plants including Arabidopsis<\\i>, the female archesporial cell elongates and polarizes longitudinally, and directly differentiates into the megasporocyte or megaspore mother cell (MMC). In some flowering plants, it undergoes a periclinal division, and subsequently the inner cell differentiates into the megasporocyte." [PMID:10465788] synonym: "female archesporial initial" RELATED [] synonym: "ovule archesporial cell" RELATED [] is_a: PO:0009002 ! plant cell relationship: part_of PO:0000018 ! ovule primordium [Term] id: PO:0006016 name: leaf epidermis def: "A portion of shoot epidermis that is part of a leaf." [POC:curators] synonym: "foliage leaf epidermis" RELATED [] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0025034 ! leaf [Term] id: PO:0006017 name: helobial endosperm def: "An endosperm in which the first karyokinetic event is accompanied by the formation of a horizontal wall which divides the central cell into unequal regions. The larger one is the micropylar chamber in which cytokinesis does not occur and the smaller one is the chalazal chamber." [ISBN:0080374913] is_a: PO:0009089 ! endosperm [Term] id: PO:0006018 name: leaf adaxial epidermis def: "A portion of shoot epidermis that covers the adaxial/upper surface of a leaf." [ISBN:0080374913] synonym: "upper epidermis" RELATED [] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0006016 ! leaf epidermis [Term] id: PO:0006019 name: leaf abaxial epidermis def: "A portion of shoot epidermis that covers the abaxial/lower surface of a leaf." [ISBN:0080374913] synonym: "lower epidermis" RELATED [] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0006016 ! leaf epidermis [Term] id: PO:0006020 name: lateral root apical meristem alt_id: PO:0003013 def: "A root apical meristem found that is part of a lateral root." [GR:pj] comment: This is different from root lateral meristem. synonym: "apical meristem of lateral root" RELATED [] synonym: "lateral root meristem" RELATED [] is_a: PO:0020147 ! root apical meristem relationship: part_of PO:0000027 ! lateral root tip [Term] id: PO:0006021 name: adventitious root apical meristem def: "A root apical meristem that is part of an adventitious root." [GR:pj] synonym: "crown root meristem" RELATED [] synonym: "seminal root meristem" RELATED [] is_a: PO:0020147 ! root apical meristem relationship: part_of PO:0000042 ! shoot-borne root [Term] id: PO:0006022 name: bundle sheath extension def: "A strip of ground tissue present along the leaf veins and extending from the bundle sheath to the epidermis. It may be present on one or both sides of the vein and may consist of parenchyma or sclerenchyma." [ISBN:0080374913] is_a: PO:0025059 ! portion of ground tissue [Term] id: PO:0006023 name: bundle sheath def: "A layer or layers of cells surrounding the vascular bundles of leaves. It may consist of parenchyma or sclerenchyma." [ISBN:0080374913] is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0006024 name: parenchyma sheath def: "A single layered, parenchymatous bundle sheath characterized by presence of large quantity of starch." [ISBN:0080374913] comment: Homologous to the endodermis. synonym: "starch sheath" RELATED [] is_a: PO:0006023 ! bundle sheath [Term] id: PO:0006025 name: mestome sheath def: "The inner endodermal sheath of a two layered bundle sheath. The cells are smaller in diameter compared to those in outer wall (starch sheath). The cell  walls are thick and contain suberized lamellae. They are analogous to endodermis." [ISBN:0080374913] is_a: PO:0006023 ! bundle sheath [Term] id: PO:0006032 name: awn def: "A long bristle-like appendage found on the tip or back of various parts of the grass spikelet." [APWeb:Glossary] subset: reference xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009037 ! lemma [Term] id: PO:0006033 name: paleal apiculus def: "A short, abrupt, flexible point present at the apex of the palea." [GR:pj] subset: reference synonym: "apiculus" RELATED [] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009038 ! palea [Term] id: PO:0006034 name: leaflet margin def: "The margin of the leaflet." [POC:curators] is_a: PO:0020128 ! leaf margin relationship: part_of PO:0020049 ! leaflet [Term] id: PO:0006035 name: shoot epidermis def: "A portion of epidermis that is part of a shoot system." [ISBN:047124529, POC:curators] comment: Often interrupted by stomata and other structures. The shoot epidermis is different from the root epidermis in its origin, function and structure. xref: OBO_SF_PO:3008016 is_a: PO:0005679 ! epidermis relationship: part_of PO:0009006 ! shoot system [Term] id: PO:0006036 name: root epidermis alt_id: PO:0006037 def: "A portion of epidermis that is part of a root system." [ISBN:0080374913] comment: The root epidermis is different from the shoot epidermis in its origin, function and structure. synonym: "epiblem" RELATED [] synonym: "rhizodermis" RELATED [] xref: OBO_SF_PO:3008016 is_a: PO:0005679 ! epidermis relationship: part_of PO:0025025 ! root system [Term] id: PO:0006039 name: adventitious root epidermis alt_id: PO:0006038 def: "The outer most cell layer of the adventitious root." [GR:pj] synonym: "crown root epidermis" RELATED [] is_a: PO:0006036 ! root epidermis relationship: part_of PO:0000042 ! shoot-borne root [Term] id: PO:0006040 name: sepal epidermis def: "The outermost cell layer of the sepal." [GR:pj] is_a: PO:0008043 ! floral epidermis relationship: part_of PO:0009031 ! sepal [Term] id: PO:0006041 name: petal epidermis def: "The epidermal layer of the petal." [GR:pj] is_a: PO:0008043 ! floral epidermis relationship: part_of PO:0009032 ! petal [Term] id: PO:0006042 name: velamen def: "A multiseriate epidermis found in aerial roots of some monocots. Most of its cells are dead and store water like a sponge." [ISBN:0080374913] synonym: "velamen radicum" RELATED [] is_a: PO:0006036 ! root epidermis [Term] id: PO:0006043 name: integument epidermis def: "A portion of shoot epidermis that is part of an integument in an ovule." [GR:pj] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0020021 ! integument [Term] id: PO:0006044 name: inner integument epidermis def: "The epidermis of the inner integument in an ovule." [GR:pj] is_a: PO:0006043 ! integument epidermis relationship: part_of PO:0020022 ! inner integument [Term] id: PO:0006045 name: outer integument epidermis def: "The epidermis of the outer integument in an ovule." [GR:pj] is_a: PO:0006043 ! integument epidermis relationship: part_of PO:0020023 ! outer integument [Term] id: PO:0006048 name: seed coat epidermis def: "An epidermis that is part of a seed coat." [GR:pj] xref: OBO_SF_PO:3008016 is_a: PO:0005679 ! epidermis relationship: part_of PO:0009088 ! seed coat [Term] id: PO:0006049 name: scutellum epidermis def: "A portion of shoot epidermis that is part of the scutellum." [GR:pj] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0020110 ! scutellum [Term] id: PO:0006050 name: exotesta def: "That part of the seed coat that develops from the outer surface of the outer integument." [GR:pj] synonym: "seed coat outer epidermis" RELATED [] is_a: PO:0006048 ! seed coat epidermis relationship: part_of PO:0020057 ! testa [Term] id: PO:0006051 name: endotesta def: "That part of the seed coat that develops from the inner epidermis of the outer integument." [GR:pj] synonym: "seed coat inner epidermis" RELATED [] is_a: PO:0006048 ! seed coat epidermis relationship: part_of PO:0020057 ! testa [Term] id: PO:0006052 name: petal abaxial epidermis def: "The abaxial/lower epidermal cell layer of the petal." [GR:pj] is_a: PO:0006041 ! petal epidermis [Term] id: PO:0006053 name: petal adaxial epidermis def: "The adaxial/upper epidermal cell layer of the petal." [GR:pj] is_a: PO:0006041 ! petal epidermis [Term] id: PO:0006054 name: sepal abaxial epidermis def: "The abaxial/lower epidermal cell layer of the sepal." [GR:pj] is_a: PO:0006040 ! sepal epidermis [Term] id: PO:0006055 name: sepal adaxial epidermis def: "The adaxial/upper epidermal cell layer of the sepal." [GR:pj] is_a: PO:0006040 ! sepal epidermis [Term] id: PO:0006056 name: cotyledon epidermis def: "A portion of shoot epidermis that is part of the cotyledon." [GR:pj] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0020030 ! cotyledon [Term] id: PO:0006057 name: cotyledon abaxial epidermis def: "The abaxial/lower epidermal cell layer of the cotyledon." [GR:pj] is_a: PO:0006056 ! cotyledon epidermis [Term] id: PO:0006058 name: cotyledon adaxial epidermis def: "The adaxial/upper epidermal cell layer of the cotyledon." [GR:pj] is_a: PO:0006056 ! cotyledon epidermis [Term] id: PO:0006060 name: filament epidermis def: "A portion of shoot epidermis that is part of the stamen filament." [GR:pj] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0009067 ! filament [Term] id: PO:0006061 name: stigma epidermis def: "The epidermal cell layer of the stigma." [GR:pj, PMID:11951033] is_a: PO:0008043 ! floral epidermis relationship: part_of PO:0009073 ! stigma [Term] id: PO:0006062 name: style epidermis def: "The epidermal cell layer of the style." [GR:pj] synonym: "transmitting tract epidermis" RELATED [] is_a: PO:0008043 ! floral epidermis relationship: part_of PO:0009074 ! style [Term] id: PO:0006063 name: ovary epidermis def: "The epidermal cell layer of the ovary." [GR:pj] is_a: PO:0008043 ! floral epidermis relationship: part_of PO:0005022 ! ovary wall [Term] id: PO:0006065 name: hypocotyl endodermis def: "A portion of endodermis that is part of a hypocotyl." [POC:curators] is_a: PO:0000252 ! endodermis relationship: part_of PO:0020100 ! hypocotyl [Term] id: PO:0006066 name: petiole parenchyma def: "Relatively unspecialized tissue present in the leaf petiole." [GR:pj] is_a: PO:0005421 ! parenchyma relationship: part_of PO:0020038 ! petiole [Term] id: PO:0006067 name: cambium-like transitional zone def: "OBSOLETE. A cup-shaped region in the shoot apical meristem found between the central mother cell and the rib and peripheral zone. The cells of this zone are derived from the corpus intials, but in some cases they arise also from tunica initials." [ISBN:0080374913] comment: If found, this zone is a temporary feature mostly in Gymnosperms. synonym: "adaxial meristem" RELATED [] synonym: "leaf meristem" RELATED [] synonym: "ventral meristem" RELATED [] is_obsolete: true [Term] id: PO:0006068 name: sepal parenchyma def: "Relatively unspecialized tissue present in the sepals." [GR:pj] is_a: PO:0005421 ! parenchyma [Term] id: PO:0006069 name: petal parenchyma def: "Relatively unspecialized tissue present in the petals." [GR:pj] is_a: PO:0005421 ! parenchyma [Term] id: PO:0006070 name: mesophyll def: "The chloroplast-containing, photosynthetic parenchymatous tissue situated between the two epidermal layers of the leaf or leaf like organs." [GR:pj] is_a: PO:0005426 ! chlorenchyma [Term] id: PO:0006071 name: petal mesophyll def: "The chloroplast-containing, photosynthetic parenchymatous tissue situated between the two epidermal layers of the petal." [GR:pj] is_a: PO:0006069 ! petal parenchyma is_a: PO:0006070 ! mesophyll [Term] id: PO:0006072 name: sepal mesophyll def: "The chloroplast-containing, photosynthetic parenchymatous tissue situated between the two epidermal layers of the sepal." [GR:pj] is_a: PO:0006068 ! sepal parenchyma is_a: PO:0006070 ! mesophyll [Term] id: PO:0006073 name: intercalary meristem def: "A shoot meristem separated from the apical meristem in the primary body by more or less mature tissues." [ISBN:0080374913, ISBN:0122151704] is_a: PO:0006079 ! shoot meristem [Term] id: PO:0006074 name: procambium def: "A portion of primary cambium that undergoes differentiation to form the primary vascular tissue." [ISBN:0080374913] is_a: PO:0005597 ! cambium relationship: part_of PO:0020144 ! apical meristem [Term] id: PO:0006075 name: primary phloem def: "A portion of phloem tissue of the primary plant body." [ISBN:0122151704] comment: In stem or root it is differentiated behind the apical meristem. is_a: PO:0005417 ! phloem [Term] id: PO:0006076 name: metaphloem def: "Part of the primary phloem that differentiates after the protophloem and before the secondary phloem, if any of the latter is formed." [ISBN:0471245194] is_a: PO:0009015 ! portion of vascular tissue relationship: part_of PO:0006075 ! primary phloem [Term] id: PO:0006077 name: protophloem def: "The first-formed elements of the primary phloem." [ISBN:0471245194] is_a: PO:0009015 ! portion of vascular tissue relationship: part_of PO:0006075 ! primary phloem [Term] id: PO:0006078 name: primary vascular tissue def: "OBSOLETE. The vascular tissue of the primary plant body at the embryonic stage. " [GR:pj] comment: Redundant to sec ... is_obsolete: true [Term] id: PO:0006079 name: shoot meristem def: "A meristem that is part of a shoot system." [GR:pj] is_a: PO:0009013 ! meristem relationship: part_of PO:0009006 ! shoot system [Term] id: PO:0006080 name: secondary vascular tissue def: "OBSOLETE. The vascular tissue derived from the vascular cambium because of the secondary growth." [GR:pj] comment: Redundant sec phloem and xylem is_obsolete: true [Term] id: PO:0006081 name: primary root apical meristem def: "A root apical meristem that is part of a primary root." [GR:pj] synonym: "apical meristem of primary root" RELATED [] synonym: "embryonic root meristem" RELATED [] is_a: PO:0020147 ! root apical meristem relationship: part_of PO:0000026 ! primary root tip [Term] id: PO:0006082 name: abaxial protoderm def: "The outermost layer of the shoot apical meristem which gives rise to the abaxial/lower leaf epidermis." [GR:pj, ISBN:0080374913] is_a: PO:0006210 ! protoderm [Term] id: PO:0006083 name: adaxial protoderm def: "The outermost layer of the shoot apical meristem which gives rise to the adaxial/upper leaf epidermis." [GR:pj, ISBN:0080374913] is_a: PO:0006210 ! protoderm [Term] id: PO:0006084 name: portion of transfusion tissue def: "Tissue consisting of tracheids and parenchyma cells, associated with the vascular bundle." [ISBN:0080374913] comment: Found generally in gymnosperm leaves. is_a: PO:0009007 ! portion of plant tissue [Term] id: PO:0006085 name: root meristem alt_id: PO:0003001 def: "A meristem that is part of a root system." [GR:pj] synonym: "meristematic zone" RELATED [] is_a: PO:0009013 ! meristem relationship: part_of PO:0025025 ! root system [Term] id: PO:0006086 name: accessory transfusion tissue def: "OBSOLETE. The accessory tissue extending laterally into the mesophyll rather than remaining associated with the vascular bundles." [ISBN:0080374913] comment: Not in current literature. is_obsolete: true [Term] id: PO:0006087 name: proliferation tissue def: "OBSOLETE. Tissue that develops from phloem parenchyma in the outer portion of the inner bark accommodating the expansion in circumference." [ISBN:0080374913] comment: check the definition. is_obsolete: true [Term] id: PO:0006088 name: primary sporogenous cell def: "It is formed by the division of the male archesporial initial. After several mitotic divisions these cells differentiate into pollen mother cells." [PMID:12897248] is_a: PO:0009002 ! plant cell relationship: develops_from PO:0006014 ! male archesporial cell [Term] id: PO:0006089 name: anther primordium def: "An organized group of cells that will differentiate into anther." [GR:pj] is_a: PO:0009066 ! anther [Term] id: PO:0006090 name: organogenic callus def: "A type of cultured callus that has competence to form any organ such as root, leaf, shoot, leafless shoot or bare stem, etc." [POC:curators] synonym: "meristematic callus" RELATED [] is_a: PO:0000009 ! cutured callus [Term] id: PO:0006091 name: embryogenic callus def: "A type of cultured callus that form embryo-like structures such as somatic embryos." [POC:curators] is_a: PO:0000009 ! cutured callus [Term] id: PO:0006109 name: pith def: "A maximal portion of parenchyma in the center of a shoot axis or root." [ISBN:0080280307] synonym: "medulla" EXACT [ISBN:0471244554 "Esau 1965"] xref: OBO_SF_PO:3011068 is_a: PO:0005421 ! parenchyma [Term] id: PO:0006200 name: fascicular cambium def: "Vascular cambium  originating from procambium within vascular bundles or fascicles." [ISBN:047124529] is_a: PO:0005598 ! vascular cambium [Term] id: PO:0006201 name: interfascicular cambium def: "Vascular cambium arising between vascular bundles or fascicles, in the interfascicular parenchyma or pith." [ISBN:047124529] is_a: PO:0005598 ! vascular cambium [Term] id: PO:0006202 name: interfascicular region def: "A portion of ground tissue located between vascular bundles in a shoot axis." [ISBN: 0-7167-1007-2, ISBN:0471244554] comment: Inapplicable for nearly all monocots. synonym: "medullary ray" EXACT [ISBN:0471244554 "Esau 1965. Plant Anatomy, second edition"] synonym: "pith ray" EXACT [ISBN:0-7167-1007-2 "Raven et al. 2005"] xref: OBO_SF_PO:3011073 is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0025029 ! shoot axis [Term] id: PO:0006203 name: pericycle def: "Part of the tissue of the stele located between the phloem and endodermis." [ISBN:047124529] subset: reference is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0020124 ! root stele [Term] id: PO:0006204 name: sporocyte def: "A diploid (2n) cell that undergoes meiosis and produces four haploid (1n) spores." [GR:pj] synonym: "meiocyte" RELATED [] is_a: PO:0009002 ! plant cell [Term] id: PO:0006205 name: spongy mesophyll cell def: "Irregularly-shaped, chlorenchymatous cell, separated by large air spaces." [GR:pj] comment: Usually found in the abaxial/lower part of the leaf mesophyll as in a dorsiventral leaf, but between two palisade parenchyma layers in an isobilateral leaf. synonym: "spongy parenchyma cell" RELATED [] is_a: PO:0004006 ! mesophyll cell relationship: part_of PO:0005647 ! spongy mesophyll [Term] id: PO:0006206 name: palisade mesophyll cell def: "Elongated chlorenchymatous cell oriented perpendicular to the leaf surface and which is active in photosynthesis." [GR:pj] comment: Usually found in the adaxil/upper part of the leaf mesophyll. synonym: "palisade parenchyma cell" RELATED [] is_a: PO:0004006 ! mesophyll cell relationship: part_of PO:0005648 ! palisade mesophyll [Term] id: PO:0006207 name: exodermal passage cell def: "A short cell in the dimorphic type of exodermis with cell wall that remains non-thickened." [PMID:11709575, TAIR:ki] is_a: PO:0000353 ! passage cell relationship: part_of PO:0005772 ! exodermis [Term] id: PO:0006208 name: endodermal passage cell def: "Cell in the endodermal layer of the root with cell wall that remains non-thickened." [TAIR:ki] is_a: PO:0000353 ! passage cell relationship: part_of PO:0000252 ! endodermis [Term] id: PO:0006209 name: lateral root epidermis def: "OBSOLETE. The outer most cell layer of the lateral roots." [GR:pj] is_obsolete: true [Term] id: PO:0006210 name: protoderm def: "A meristem that develops from the outer layer of an apical meristem and gives rise to a portion of epidermis." [ISBN:047124529, POC:curators] comment: It may or may not arise from independent initials.  Some researchers also call it an epidermis in meristematic state. synonym: "dermatogen cell" RELATED [] xref: OBO_SF_PO:3016651 is_a: PO:0009013 ! meristem [Term] id: PO:0006211 name: separation layer def: "A portion of plant tissue containing cells that develop an abnormal wall chemistry and swelling resulting in easily being pulled apart along the pectin-rich middle lamella; directly involved in the weakening process of abscission." [ISBN:0122151704] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0000146 ! abscission zone [Term] id: PO:0006212 name: protective layer def: "The layer of cells in the abscission zone that have lignin and suberin depositions and are found on the axial side of the break or exposed surface of abscission." [ISBN:0122151704] relationship: part_of PO:0000146 ! abscission zone [Term] id: PO:0006213 name: root aerenchyma def: "Parenchyma tissue containing particularly large intercellular spaces in the tissue of roots." [GR:pj] is_a: PO:0005702 ! aerenchyma relationship: part_of PO:0009005 ! root [Term] id: PO:0006214 name: stem aerenchyma def: "A portion of aerenchyma that is part of a stem." [POC:curators] is_a: PO:0005702 ! aerenchyma relationship: part_of PO:0009047 ! stem [Term] id: PO:0006215 name: leaf aerenchyma def: "Spongy parenchyma tissue containing particularly large intercellular spaces in the leaf mesophyll." [GR:pj] is_a: PO:0005702 ! aerenchyma relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0006216 name: internal phloem def: "Primary phloem tissue positioned internal to the primary xylem." [ISBN:0122151704] synonym: "intraxylary phloem" RELATED [] is_a: PO:0006075 ! primary phloem [Term] id: PO:0006218 name: exotegmen def: "That part of the seed coat that develops from the outer surface of the inner integument." [GR:pj] is_a: PO:0006048 ! seed coat epidermis relationship: part_of PO:0020056 ! tegmen [Term] id: PO:0006219 name: endotegmen def: "That part of the seed coat that develops from the inner epidermis of the inner integument." [GR:pj] is_a: PO:0006048 ! seed coat epidermis relationship: part_of PO:0020056 ! tegmen [Term] id: PO:0006220 name: central endosperm def: "A portion of plant tissue that is the central region of an endosperm, composed of cells that are significantly larger than those at the periphery, especially the aleurone and sub-aleurone layers." [TAIR:ki] comment: Also called starchy endosperm region (characteristic of some grasses). is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0006221 name: articulated laticifer cell def: "A laticifer cell in which the walls between contiguous cells may partly or completely disappear." [ISBN:0471245208, TAIR:ki] synonym: "laticiferous vessel" RELATED [] is_a: PO:0025031 ! laticifer cell relationship: part_of PO:0005006 ! articulated laticifer [Term] id: PO:0006222 name: non-articulated laticifer cell def: "A laticifer cell that elongates indefinitely and grows intrusively between the walls of meristematic cells." [PMID:11732189] synonym: "simple laticifer" RELATED [] is_a: PO:0025031 ! laticifer cell relationship: part_of PO:0005007 ! non-articulated laticifer [Term] id: PO:0006300 name: obsolete plant structure def: "OBSOLETE. The instances of this parent term are those anatomical terms which have become obsolete." [GR:pj] is_obsolete: true [Term] id: PO:0006301 name: corpus def: "OBSOLETE. Group of cells located beneath anticlinally dividing peripheral layers (tunica) and dividing in many planes. In apical shoot meristem. Such division cause the increase in the volume of shoot." [GR:pj, ISBN:0080374913] comment: The term has been made obsolete because this concept is used in a very loose sense. is_obsolete: true [Term] id: PO:0006302 name: tunica def: "OBSOLETE. The outermost layer or layers in the shoot apical meristem of the Angiosperms in which the plane of division is almost anticlinal. This layer contributes to surface growth." [GR:pj, ISBN:047124529] comment: The term has been made obsolete because this concept is used in a very loose sense. is_obsolete: true [Term] id: PO:0006303 name: L1 def: "OBSOLETE. The outer layer of the tunica." [GR:pj] comment: A similar term L1 meristem (PO:0009020) occurs. is_obsolete: true [Term] id: PO:0006304 name: L2 def: "OBSOLETE. The second layer of the tunica." [GR:pj] comment: A similar term L2 meristem (PO:0009021) occurs. is_obsolete: true [Term] id: PO:0006305 name: L3 def: "OBSOLETE. The innermost layer of the tunica." [GR:pj] comment: A similar term L3 meristem (PO:0009022) occurs. is_obsolete: true [Term] id: PO:0006306 name: shoot procambium def: "A derivative of the apical meristem which undergoes differentiation to form the primary vascular tissue of a shoot." [GR:pj] is_a: PO:0006074 ! procambium relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0006307 name: root procambium def: "A derivative of the apical meristem which undergoes differentiation to form the primary vascular tissue of a root." [GR:pj] is_a: PO:0006074 ! procambium relationship: part_of PO:0006085 ! root meristem [Term] id: PO:0006308 name: root lateral meristem def: "Meristem of the root located parallel to the sides of the axis." [ISBN:047124529] comment: Generally causes root thickening. Not to be confused with lateral root meristem, which is the meristem of the lateral root. is_a: PO:0006085 ! root meristem is_a: PO:0020145 ! lateral meristem relationship: part_of PO:0020121 ! lateral root [Term] id: PO:0006309 name: tassel spikelet def: "Ultimate inflorescence branch of the maize tassel." [GR:pj] subset: Maize is_a: PO:0009051 ! spikelet relationship: develops_from PO:0006358 ! tassel spikelet pair meristem relationship: part_of PO:0020126 ! tassel [Term] id: PO:0006310 name: tassel floret def: "Flowers of the spikelets of maize tassel." [GR:pj] subset: Maize is_a: PO:0006318 ! floret (sensu Poaceae) relationship: part_of PO:0006309 ! tassel spikelet [Term] id: PO:0006311 name: tassel sessile spikelet def: "Ultimate inflorescence branch of the maize tassel without a pedicel, developing from the spikelet pair meristem." [GR:pj] subset: Maize is_a: PO:0006309 ! tassel spikelet [Term] id: PO:0006312 name: tassel pedicellate spikelet def: "Ultimate inflorescence branch of the maize tassel with a pedicel, developing from the spikelet pair meristem." [GR:pj] subset: Maize is_a: PO:0006309 ! tassel spikelet [Term] id: PO:0006313 name: lower floret of pedicellate spikelet of tassel def: "The lower of the two florets of the pedicellate spikelet of a maize tassel." [GR:pj] is_a: PO:0006310 ! tassel floret relationship: part_of PO:0006312 ! tassel pedicellate spikelet [Term] id: PO:0006314 name: upper floret of pedicellate spikelet of tassel def: "One of the two florets placed above the lower floret on the pedicellate spikelet rachilla of a maize tassel." [GR:pj] is_a: PO:0006310 ! tassel floret relationship: part_of PO:0006312 ! tassel pedicellate spikelet [Term] id: PO:0006315 name: lower floret of sessile spikelet of tassel def: "The lower of the two florets of the sessile spikelet of a maize tassel." [GR:pj] is_a: PO:0006310 ! tassel floret relationship: part_of PO:0006311 ! tassel sessile spikelet [Term] id: PO:0006316 name: upper floret of sessile spikelet of tassel def: "One of the two florets placed above the lower floret on the sessile spikelet rachilla of a maize tassel." [GR:pj] is_a: PO:0006310 ! tassel floret relationship: part_of PO:0006311 ! tassel sessile spikelet [Term] id: PO:0006317 name: gynoecium of tassel floret def: "Collectively the carpels of a maize tassel floret." [GR:pj] comment: The development of the gynoecium in the tassel floret of a normal maize plant is aborted and is present in a rudimentary state. is_a: PO:0006357 ! gynoecium (sensu Zea) relationship: part_of PO:0006310 ! tassel floret [Term] id: PO:0006318 name: floret (sensu Poaceae) def: "Small flowers of the spikelets of Poaceae." [Poc:curators] comment: It is not clear what the lemma, palea and lodicule correspond to in conventional flowers, therefore we are not making any assumptions of homology at the present time. subset: reference is_a: PO:0009082 ! floret relationship: part_of PO:0009051 ! spikelet [Term] id: PO:0006319 name: spikelet pedicel def: "Inflorescence branch that terminates in a spikelet." [Poc:curators] comment: This is not a pedicel in the strict sense, but is the ultimate naked part of the inflorescence axis. is_a: PO:0009052 ! pedicel relationship: part_of PO:0009051 ! spikelet [Term] id: PO:0006320 name: ear spikelet def: "Ultimate inflorescence branch of the maize ear." [GR:pj] is_a: PO:0009051 ! spikelet relationship: part_of PO:0020136 ! ear (sensu Zea) [Term] id: PO:0006321 name: second order inflorescence branch def: "Any branch forming from the primary or first order inflorescence branch." [GR:pj] synonym: "primary branch" RELATED [] is_a: PO:0009081 ! inflorescence branch [Term] id: PO:0006322 name: third order inflorescence branch def: "Any branch forming from the second order inflorescence branch." [GR:pj] synonym: "secondary inflorescence branch" RELATED [] is_a: PO:0009081 ! inflorescence branch [Term] id: PO:0006323 name: tassel branch def: "Any branch forming from the primary or higher order tassel axes." [GR:pj] is_a: PO:0009081 ! inflorescence branch relationship: part_of PO:0020126 ! tassel [Term] id: PO:0006324 name: central spike of tassel def: "The inflorescence axis of the tassel." [GR:pj] synonym: "tassel rachis" RELATED [] is_a: PO:0020122 ! inflorescence axis relationship: part_of PO:0020126 ! tassel [Term] id: PO:0006325 name: inflorescence node def: "A shoot node that is part of an inflorescence axis and where a spikelet, flower, floret or inflorescence branch is attached." [GR:pj] is_a: PO:0005004 ! shoot node relationship: part_of PO:0020122 ! inflorescence axis [Term] id: PO:0006326 name: inflorescence internode def: "A shoot internode that is part of an inflorescence axis." [POC:curators] is_a: PO:0005005 ! shoot internode relationship: part_of PO:0020122 ! inflorescence axis [Term] id: PO:0006327 name: spikelet meristem def: "An inflorescence apical meristem that gives rise to the two or more florets of a grass inflorescence." [GR:pj] is_a: PO:0009108 ! inflorescence apical meristem relationship: part_of PO:0009051 ! spikelet [Term] id: PO:0006328 name: spikelet pair meristem def: "The meristem that produces two spikelet meristems, each of which produces two floral meristems." [GR:pj] comment: Found in some grass inflorescences. is_a: PO:0006327 ! spikelet meristem [Term] id: PO:0006329 name: floret meristem (sensu Poaceae) def: "Meristem that gives rise to the organs of a floret of a grass plant." [GR:pj] is_a: PO:0000229 ! floral meristem relationship: part_of PO:0009051 ! spikelet [Term] id: PO:0006330 name: gynophore def: "A shoot axis that is an elongation of the floral axis that supports the carpels." [ISBN:0-521-25134-6] comment: A gynophore is only present when there is an elongation of the axis between the androecium and gynoecium. subset: reference is_a: PO:0025029 ! shoot axis relationship: part_of PO:0009046 ! flower [Term] id: PO:0006331 name: seed raphe def: "The ridge along the body of the seed formed from the part of funiculus that was adnate to the ovule." [ISBN:047124529] relationship: develops_from PO:0020027 ! raphe relationship: part_of PO:0009010 ! seed [Term] id: PO:0006332 name: seed funicle def: "Remnants of the funicle from the ovary where it attaches the ovule to the placenta." [GR:pj] relationship: develops_from PO:0020006 ! funicle relationship: part_of PO:0009010 ! seed [Term] id: PO:0006333 name: seed chalaza def: "A remnant of the ovular chalaza that is part of the seed." [POC:curators] is_a: PO:0009007 ! portion of plant tissue relationship: develops_from PO:0020026 ! chalaza relationship: part_of PO:0009010 ! seed [Term] id: PO:0006334 name: seed micropyle def: "A pore on the seed coat which is a remnant of the ovular micropyle." [GR:pj] relationship: develops_from PO:0020025 ! micropyle relationship: part_of PO:0009010 ! seed [Term] id: PO:0006336 name: seed obturator def: "An outgrowth of the seed funicle, that forms a bridge between the seed micropyle and other tissues. It is also a remnant form of the obturator found in the ovular funicle." [GR:pj] is_a: PO:0009007 ! portion of plant tissue relationship: develops_from PO:0020029 ! obturator relationship: part_of PO:0006332 ! seed funicle [Term] id: PO:0006337 name: inflorescence bract of ear def: "The leaf subtending an ear of corn and acting as outer envelope of the ear." [GR:pj] synonym: "corn husk" RELATED [] synonym: "husk" RELATED [] synonym: "husk leaf" RELATED [] is_a: PO:0009054 ! inflorescence bract relationship: part_of PO:0020136 ! ear (sensu Zea) [Term] id: PO:0006338 name: embryonic leaf def: "The first few leaves developing from the embryonic shoot apical meristem." [GR:pj] is_a: PO:0009025 ! vascular leaf relationship: part_of PO:0009009 ! embryo [Term] id: PO:0006339 name: juvenile leaf def: "Distinct from adult leaves, being characterized by particular anatomical traits namely, wax and trichome distribution, presence or absence of epidermal cell types, cell wall shape and biochemistry." [GR:pj, MaizeGDB:lv] comment: The first juvenile leaves are e.g. the embryonic leaves found in the grass kernel (caryopsis). is_a: PO:0009025 ! vascular leaf [Term] id: PO:0006340 name: adult leaf def: "Adult leaves are characterized by particular anatomical traits namely, wax and trichome distribution, presence or absence of epidermal cell types, cell wall shape and biochemistry." [GR:pj, MaizeGDB:lv] comment: The adult leaves are placed above the juvenile (oldest) leaves. However in some plants the juvenile leaves may go on to establish as adult leaves. is_a: PO:0009025 ! vascular leaf [Term] id: PO:0006341 name: primary shoot def: "The shoot developing from the embryonic shoot apical meristem." [UMSL:fz] synonym: "main stalk" RELATED [] is_a: PO:0009006 ! shoot system [Term] id: PO:0006342 name: infructescence def: "The grouping or arrangement in which fruits are borne on a plant." [GR:pj] xref: OBO_SF_PO:2971891 is_a: PO:0009006 ! shoot system relationship: has_part PO:0009001 ! fruit [Term] id: PO:0006343 name: axillary shoot def: "A shoot-borne shoot system that develops from an axillary vegetative bud." [POC:curators] synonym: "axillary branch" RELATED [] is_a: PO:0004545 ! shoot-borne shoot system [Term] id: PO:0006344 name: shoot lateral meristem def: "A shoot meristem located parallel to the sides of the axis." [Poc:curators] is_a: PO:0006079 ! shoot meristem is_a: PO:0020145 ! lateral meristem [Term] id: PO:0006345 name: pollen tube def: "A tubular cell extension formed by the germinating pollen grain; carries the male gametes into the ovule." [ISBN:0471245208] subset: reference relationship: part_of PO:0020091 ! male gametophyte [Term] id: PO:0006346 name: leaf intercalary meristem def: "An intercalary meristem in the primary body of the leaf separated from the apical meristem by non-meristematic tissues." [GR:pj] is_a: PO:0006073 ! intercalary meristem relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0006347 name: stem intercalary meristem def: "An intercalary meristem in the primary body of stem separated from the apical meristem by more or less mature tissues." [GR:pj] is_a: PO:0006073 ! intercalary meristem relationship: part_of PO:0009047 ! stem relationship: part_of PO:0020142 ! stem internode [Term] id: PO:0006348 name: ear pedicellate spikelet def: "Ultimate pedicellate inflorescence branch of the maize ear that develops from the spikelet pair meristem." [GR:pj] is_a: PO:0006320 ! ear spikelet [Term] id: PO:0006349 name: ear sessile spikelet def: "Ultimate sessile inflorescence branch of the maize ear that develops from the spikelet pair meristem." [GR:pj] is_a: PO:0006320 ! ear spikelet [Term] id: PO:0006350 name: upper floret of pedicellate spikelet of ear def: "The uppermost of the two florets of the pedicellate spikelet rachilla of a maize ear. The upper floret on the ear usually develops into a functional one." [GR:pj] is_a: PO:0006354 ! ear floret relationship: part_of PO:0006348 ! ear pedicellate spikelet [Term] id: PO:0006351 name: lower floret of sessile spikelet of ear def: "The lower of the two florets on the sessile spikelet of a maize ear." [GR:pj] comment: This floret does not usually develop into a functional one. is_a: PO:0006354 ! ear floret relationship: part_of PO:0006349 ! ear sessile spikelet [Term] id: PO:0006352 name: upper floret of sessile spikelet of ear def: "One of the two florets placed above the lower floret on the sessile spikelet rachilla of a maize ear. This floret usually develops into a functional one." [GR:pj] is_a: PO:0006354 ! ear floret relationship: part_of PO:0006349 ! ear sessile spikelet [Term] id: PO:0006353 name: lower floret of pedicellate spikelet of ear def: "The lower of the two florets of the pedicellate spikelet rachilla of a maize ear." [GR:pj] comment: The lower floret on the ear does not usually develop into a functional one. is_a: PO:0006354 ! ear floret relationship: part_of PO:0006348 ! ear pedicellate spikelet [Term] id: PO:0006354 name: ear floret def: "Small flowers of the spikelets of maize ear." [GR:pj] is_a: PO:0006318 ! floret (sensu Poaceae) relationship: part_of PO:0006320 ! ear spikelet [Term] id: PO:0006355 name: androecium of ear floret def: "Collectively the stamens of maize ear floret." [GR:pj] comment: The development of the androecium in the ear floret of a normal maize plant is aborted and is present in a rudimentary state. is_a: PO:0006471 ! androecium (sensu Zea) relationship: part_of PO:0006354 ! ear floret [Term] id: PO:0006356 name: lemma of tassel floret def: "The lower of the two bracts enclosing a flower in a maize tassel floret." [GR:pj] is_a: PO:0009037 ! lemma relationship: part_of PO:0006310 ! tassel floret [Term] id: PO:0006357 name: gynoecium (sensu Zea) def: "Collectively the carpels of a maize floret." [GR:pj] is_a: PO:0006384 ! gynoecium (sensu Poaceae) [Term] id: PO:0006358 name: tassel spikelet pair meristem def: "The meristem present on short tassel branch that produces two spikelet meristems, each of which produces two floral meristems in a maize tassel." [GR:pj] subset: Maize is_a: PO:0006328 ! spikelet pair meristem is_a: PO:0009107 ! tassel lateral meristem relationship: part_of PO:0009102 ! short tassel branch [Term] id: PO:0006359 name: palea of tassel floret def: "In a maize tassel floret, the upper of the two bracts enclosing a flower." [GR:pj] is_a: PO:0009038 ! palea relationship: part_of PO:0006310 ! tassel floret [Term] id: PO:0006360 name: ear spikelet pair meristem def: "A meristem that produces two spikelet meristems, each of which produces two floral meristems in a maize ear." [GR:pj] is_a: PO:0006328 ! spikelet pair meristem is_a: PO:0009110 ! ear lateral meristem [Term] id: PO:0006361 name: palea of ear floret def: "In a maize ear floret, the upper of the two bracts enclosing a flower." [GR:pj] is_a: PO:0009038 ! palea relationship: part_of PO:0006354 ! ear floret [Term] id: PO:0006362 name: embryonic shoot apical meristem def: "A vegetative shoot apical meristem at the apex of the embryonic axis." [GR:pj] is_a: PO:0008016 ! vegetative shoot apical meristem relationship: part_of PO:0019018 ! embryo axis [Term] id: PO:0006363 name: lemma of ear floret def: "The lower of the two bracts enclosing a flower in a maize ear floret." [GR:pj] is_a: PO:0009037 ! lemma relationship: part_of PO:0006354 ! ear floret [Term] id: PO:0006365 name: gynoecium of ear floret def: "Collectively the carpels of a maize ear floret." [GR:pj] is_a: PO:0006357 ! gynoecium (sensu Zea) relationship: part_of PO:0006354 ! ear floret [Term] id: PO:0006366 name: androecium of tassel floret def: "Collectively the stamens of one floret of a tassel inflorescence of maize." [GR:pj] is_a: PO:0006471 ! androecium (sensu Zea) relationship: part_of PO:0006310 ! tassel floret [Term] id: PO:0006367 name: glume of ear spikelet def: "A bract in the ear inflorescence of a maize plant, subtending two florets." [GR:pj] is_a: PO:0009039 ! glume relationship: part_of PO:0006320 ! ear spikelet [Term] id: PO:0006368 name: glume of tassel spikelet def: "A bract in the tassel inflorescence of a maize plant, subtending two florets." [GR:pj] is_a: PO:0009039 ! glume relationship: part_of PO:0006309 ! tassel spikelet [Term] id: PO:0006369 name: lower glume of ear spikelet def: "The proximal/basal of the two glumes in the ear spikelet." [GR:pj] is_a: PO:0006002 ! lower glume is_a: PO:0006367 ! glume of ear spikelet [Term] id: PO:0006370 name: upper glume of tassel spikelet def: "The apical/distal of the two glumes in the tassel spikelet." [GR:pj] is_a: PO:0006004 ! upper glume is_a: PO:0006368 ! glume of tassel spikelet [Term] id: PO:0006371 name: upper glume of ear spikelet def: "TThe apical/distal of the two glumes in the ear spikelet." [GR:pj] is_a: PO:0006004 ! upper glume is_a: PO:0006367 ! glume of ear spikelet [Term] id: PO:0006372 name: lower glume of tassel spikelet def: "The proximal/basal of the two glumes in the tassel spikelet." [GR:pj] is_a: PO:0006002 ! lower glume is_a: PO:0006368 ! glume of tassel spikelet [Term] id: PO:0006373 name: ear floret meristem def: "Apical shoot meristem that gives rise to the organs of a maize ear floret." [GR:pj] subset: Maize is_a: PO:0006329 ! floret meristem (sensu Poaceae) is_a: PO:0009109 ! ear meristem relationship: part_of PO:0006320 ! ear spikelet [Term] id: PO:0006374 name: tassel floret meristem def: "Apical meristem that gives rise to the organs of a maize tassel floret." [GR:pj] subset: Maize is_a: PO:0006329 ! floret meristem (sensu Poaceae) is_a: PO:0009106 ! tassel meristem relationship: part_of PO:0006309 ! tassel spikelet [Term] id: PO:0006375 name: ear apical meristem def: "An inflorescence apical meristem that gives rise to the maize ear." [GR:pj] subset: Maize is_a: PO:0009108 ! inflorescence apical meristem is_a: PO:0009109 ! ear meristem relationship: part_of PO:0006505 ! central spike of ear [Term] id: PO:0006376 name: tassel apical meristem def: "An inflorescence apical meristem that gives rise to the maize tassel." [GR:pj] subset: Maize is_a: PO:0009106 ! tassel meristem is_a: PO:0009108 ! inflorescence apical meristem relationship: part_of PO:0006324 ! central spike of tassel [Term] id: PO:0006377 name: tassel spikelet meristem def: "Apical meristem that gives rise to the upper and lower florets of the maize tassel spikelets." [GR:pj] is_a: PO:0006327 ! spikelet meristem is_a: PO:0009106 ! tassel meristem [Term] id: PO:0006378 name: ear spikelet meristem def: "Apical meristem that gives rise to the upper and lower florets of the maize ear spikelet." [GR:pj] subset: Maize is_a: PO:0006327 ! spikelet meristem is_a: PO:0009109 ! ear meristem [Term] id: PO:0006379 name: tassel spikelet rachilla def: "The axis of the tassel spikelet, above the glumes." [GR:pj] subset: Maize is_a: PO:0006323 ! tassel branch is_a: PO:0009080 ! spikelet rachilla relationship: part_of PO:0006309 ! tassel spikelet [Term] id: PO:0006380 name: ear spikelet rachilla def: "The axis of the ear spikelet, above the glumes." [GR:pj] is_a: PO:0009080 ! spikelet rachilla relationship: part_of PO:0006320 ! ear spikelet [Term] id: PO:0006381 name: lodicule of tassel floret def: "In a tassel floret, one of two or three tiny scales or flaps of tissue outside the stamens, possibly representing reduced perianth segments." [APWeb:Glossary, GR:pj] is_a: PO:0009036 ! lodicule relationship: part_of PO:0006310 ! tassel floret [Term] id: PO:0006382 name: lodicule of ear floret def: "In a Maize ear floret, one of two or three tiny scales or flaps of tissue, possibly representing reduced perianth segments." [APWeb:Glossary, GR:pj] is_a: PO:0009036 ! lodicule relationship: part_of PO:0006354 ! ear floret [Term] id: PO:0006383 name: androecium (sensu Poaceae) def: "Collectively the stamens of one grass floret." [GR:pj] is_a: PO:0009061 ! androecium relationship: part_of PO:0006318 ! floret (sensu Poaceae) [Term] id: PO:0006384 name: gynoecium (sensu Poaceae) def: "Collectively the carpels of a grass floret." [GR:pj] is_a: PO:0009062 ! gynoecium relationship: part_of PO:0006318 ! floret (sensu Poaceae) [Term] id: PO:0006385 name: lower glume of pedicellate spikelet of tassel def: "The proximal/basal of the two glumes in the tassel pedicellate spikelet." [GR:pj] is_a: PO:0006372 ! lower glume of tassel spikelet relationship: part_of PO:0006312 ! tassel pedicellate spikelet [Term] id: PO:0006386 name: lower glume of sessile spikelet of tassel def: "The proximal/basal of the two glumes in the tassel sessile spikelet." [GR:pj] is_a: PO:0006372 ! lower glume of tassel spikelet relationship: part_of PO:0006311 ! tassel sessile spikelet [Term] id: PO:0006387 name: upper glume of sessile spikelet of tassel def: "The apical/distal of the two glumes in a tassel sessile spikelet." [GR:pj] is_a: PO:0006370 ! upper glume of tassel spikelet relationship: part_of PO:0006311 ! tassel sessile spikelet [Term] id: PO:0006388 name: upper glume of pedicellate spikelet of tassel def: "The apical/distal of the two glumes in a tassel pedicellate spikelet." [GR:pj] is_a: PO:0006370 ! upper glume of tassel spikelet relationship: part_of PO:0006312 ! tassel pedicellate spikelet [Term] id: PO:0006389 name: rachilla of sessile spikelet of tassel def: "The axis of the tassel sessile spikelet, above the glumes." [GR:pj] is_a: PO:0006379 ! tassel spikelet rachilla relationship: part_of PO:0006311 ! tassel sessile spikelet relationship: part_of PO:0006349 ! ear sessile spikelet [Term] id: PO:0006390 name: rachilla of pedicellate spikelet of tassel def: "The axis of the tassel pedicellate spikelet, above the glumes." [GR:pj] is_a: PO:0006379 ! tassel spikelet rachilla relationship: part_of PO:0006312 ! tassel pedicellate spikelet [Term] id: PO:0006391 name: gynoecium of lower floret of sessile spikelet of tassel def: "Collectively the carpels of a lower floret of sessile spikelet of maize tassel." [GR:pj] comment: A non-functional or rudimentary gynoecium. is_a: PO:0006317 ! gynoecium of tassel floret relationship: part_of PO:0006315 ! lower floret of sessile spikelet of tassel [Term] id: PO:0006392 name: androecium of upper floret of sessile spikelet of tassel def: "Collectively the stamens of upper floret of a sessile spikelet of tassel inflorescence of maize." [GR:pj] is_a: PO:0006366 ! androecium of tassel floret relationship: part_of PO:0006316 ! upper floret of sessile spikelet of tassel [Term] id: PO:0006393 name: androecium of lower floret of sessile spikelet of tassel def: "Collectively the stamens of lower floret of a sessile spikelet of tassel inflorescence of maize." [GR:pj] is_a: PO:0006366 ! androecium of tassel floret relationship: part_of PO:0006315 ! lower floret of sessile spikelet of tassel [Term] id: PO:0006394 name: gynoecium of upper floret of sessile spikelet of tassel def: "Collectively the carpels of a upper floret of sessile spikelet of maize tassel." [GR:pj] comment: A non-functional or rudimentary gynoecium. is_a: PO:0006317 ! gynoecium of tassel floret relationship: part_of PO:0006316 ! upper floret of sessile spikelet of tassel [Term] id: PO:0006395 name: lemma of upper floret of sessile spikelet of tassel def: "The lower of the two bracts enclosing a flower in a maize tassel sessile spikelet upper floret." [GR:pj] is_a: PO:0006356 ! lemma of tassel floret relationship: part_of PO:0006316 ! upper floret of sessile spikelet of tassel [Term] id: PO:0006397 name: lemma of lower floret of sessile spikelet of tassel def: "The lower of the two bracts enclosing a flower in a maize tassel sessile spikelet lower floret." [GR:pj] is_a: PO:0006356 ! lemma of tassel floret relationship: part_of PO:0006315 ! lower floret of sessile spikelet of tassel [Term] id: PO:0006399 name: palea of lower floret of sessile spikelet of tassel def: "The upper of the two bracts enclosing a flower in a maize tassel sessile spikelet lower floret." [GR:pj] is_a: PO:0006359 ! palea of tassel floret relationship: part_of PO:0006315 ! lower floret of sessile spikelet of tassel [Term] id: PO:0006401 name: palea of upper floret of sessile spikelet of tassel def: "The upper of the two bracts enclosing a flower in a maize tassel sessile spikelet upper floret." [GR:pj] is_a: PO:0006359 ! palea of tassel floret relationship: part_of PO:0006316 ! upper floret of sessile spikelet of tassel [Term] id: PO:0006403 name: gynoecium of lower floret of pedicellate spikelet of tassel def: "Collectively the carpels of a lower floret of pedicellate spikelet of maize tassel." [GR:pj] comment: A non-functional or rudimentary gynoecium. is_a: PO:0006317 ! gynoecium of tassel floret relationship: part_of PO:0006313 ! lower floret of pedicellate spikelet of tassel [Term] id: PO:0006404 name: gynoecium of upper floret of pedicellate spikelet of tassel def: "Collectively the carpels of a upper floret of pedicellate spikelet of maize tassel." [GR:pj] comment: A non-functional or rudimentary gynoecium. is_a: PO:0006317 ! gynoecium of tassel floret relationship: part_of PO:0006314 ! upper floret of pedicellate spikelet of tassel [Term] id: PO:0006405 name: androecium of upper floret of pedicellate spikelet of tassel def: "Collectively the stamens of upper floret of a pedicellate spikelet of tassel inflorescence of maize." [GR:pj] comment: This constitutes a functional androecium. is_a: PO:0006366 ! androecium of tassel floret relationship: part_of PO:0006314 ! upper floret of pedicellate spikelet of tassel [Term] id: PO:0006406 name: androecium of lower floret of pedicellate spikelet of tassel def: "Collectively the stamens of lower floret of a pedicellate spikelet of tassel inflorescence of maize." [GR:pj] comment: This constitutes a functional androecium. is_a: PO:0006366 ! androecium of tassel floret relationship: part_of PO:0006313 ! lower floret of pedicellate spikelet of tassel [Term] id: PO:0006407 name: lemma of lower floret of pedicellate spikelet of tassel def: "The lower of the two bracts enclosing a flower in a maize tassel pedicellate spikelet lower floret." [GR:pj] is_a: PO:0006356 ! lemma of tassel floret relationship: part_of PO:0006313 ! lower floret of pedicellate spikelet of tassel [Term] id: PO:0006409 name: lemma of upper floret of pedicellate spikelet of tassel def: "The lower of the two bracts enclosing a flower in a maize tassel pedicellate spikelet upper floret." [GR:pj] is_a: PO:0006356 ! lemma of tassel floret relationship: part_of PO:0006314 ! upper floret of pedicellate spikelet of tassel [Term] id: PO:0006411 name: palea of lower floret of pedicellate spikelet of tassel def: "The upper of the two bracts enclosing a flower in a maize tassel pedicellate spikelet lower floret." [GR:pj] is_a: PO:0006359 ! palea of tassel floret relationship: part_of PO:0006313 ! lower floret of pedicellate spikelet of tassel [Term] id: PO:0006413 name: palea of upper floret of pedicellate spikelet of tassel def: "The upper of the two bracts enclosing a flower in a maize tassel pedicellate spikelet upper floret." [GR:pj] is_a: PO:0006359 ! palea of tassel floret relationship: part_of PO:0006314 ! upper floret of pedicellate spikelet of tassel [Term] id: PO:0006415 name: pedicel of ear spikelet def: "This is the ultimate branch of the pedicellate ear spikelet." [GR:pj] is_a: PO:0006319 ! spikelet pedicel relationship: part_of PO:0006348 ! ear pedicellate spikelet [Term] id: PO:0006416 name: pedicel of tassel spikelet def: "This is the ultimate branch of the pedicellate tassel spikelet." [GR:pj] is_a: PO:0006319 ! spikelet pedicel relationship: part_of PO:0006312 ! tassel pedicellate spikelet [Term] id: PO:0006417 name: tassel peduncle def: "The axis of a maize tassel below the lowest tassel node." [GR:pj] is_a: PO:0009053 ! peduncle relationship: part_of PO:0020126 ! tassel [Term] id: PO:0006418 name: ear peduncle def: "The stalk of a maize ear below the lowest ear node." [GR:pj] synonym: "lateral branch (sensu Zea)" RELATED [] synonym: "shank" RELATED [] is_a: PO:0009053 ! peduncle relationship: part_of PO:0020136 ! ear (sensu Zea) [Term] id: PO:0006419 name: androecium of lower floret of pedicellate spikelet of ear def: "Collectively the stamens of lower floret of a pedicellate spikelet of maize ear inflorescence." [GR:pj] comment: The development of the androecium in the ear floret of a normal maize plant is aborted and is present in a rudimentary state. is_a: PO:0006355 ! androecium of ear floret relationship: part_of PO:0006353 ! lower floret of pedicellate spikelet of ear [Term] id: PO:0006420 name: androecium of lower floret of sessile spikelet of ear def: "Collectively the stamens of lower floret of a sessile spikelet of maize ear inflorescence." [GR:pj] comment: The development of the androecium in the ear floret of a normal maize plant is aborted and is present in a rudimentary state. is_a: PO:0006355 ! androecium of ear floret relationship: part_of PO:0006351 ! lower floret of sessile spikelet of ear [Term] id: PO:0006421 name: androecium of upper floret of sessile spikelet of ear def: "Collectively the stamens of upper floret of a sessile spikelet of maize ear inflorescence." [GR:pj] comment: The development of the androecium in the ear floret of a normal maize plant is aborted and is present in a rudimentary state. is_a: PO:0006355 ! androecium of ear floret relationship: part_of PO:0006352 ! upper floret of sessile spikelet of ear [Term] id: PO:0006422 name: androecium of upper floret of pedicellate spikelet of ear def: "Collectively the stamens of upper floret of a pedicellate spikelet of maize ear inflorescence." [GR:pj] comment: The development of the androecium in the ear floret of a normal maize plant is aborted and is present in a rudimentary state. is_a: PO:0006355 ! androecium of ear floret relationship: part_of PO:0006350 ! upper floret of pedicellate spikelet of ear [Term] id: PO:0006423 name: gynoecium of lower floret of sessile spikelet of ear def: "Collectively the carpels of a lower floret of sessile spikelet of maize ear." [GR:pj] comment: A non-functional or rudimentary gynoecium. is_a: PO:0006365 ! gynoecium of ear floret relationship: part_of PO:0006351 ! lower floret of sessile spikelet of ear [Term] id: PO:0006424 name: gynoecium of lower floret of pedicellate spikelet of ear def: "Collectively the carpels of a lower floret of pedicellate spikelet of a maize ear." [GR:pj] comment: A non-functional or rudimentary gynoecium. is_a: PO:0006365 ! gynoecium of ear floret relationship: part_of PO:0006353 ! lower floret of pedicellate spikelet of ear [Term] id: PO:0006425 name: gynoecium of upper floret of sessile spikelet of ear def: "Collectively the carpels of a upper floret of sessile spikelet of maize ear." [GR:pj] comment: A functional gynoecium. is_a: PO:0006365 ! gynoecium of ear floret relationship: part_of PO:0006352 ! upper floret of sessile spikelet of ear [Term] id: PO:0006426 name: gynoecium of upper floret of pedicellate spikelet of ear def: "Collectively the carpels of a upper floret of pedicellate spikelet of maize ear." [GR:pj] comment: A functional gynoecium. is_a: PO:0006365 ! gynoecium of ear floret relationship: part_of PO:0006350 ! upper floret of pedicellate spikelet of ear [Term] id: PO:0006427 name: palea of upper floret of sessile spikelet of ear def: "The upper of the two bracts enclosing a flower in a maize ear sessile spikelet upper floret." [GR:pj] is_a: PO:0006361 ! palea of ear floret relationship: part_of PO:0006352 ! upper floret of sessile spikelet of ear [Term] id: PO:0006428 name: palea of lower floret of sessile spikelet of ear def: "The upper of the two bracts enclosing a flower in a maize ear sessile spikelet lower floret." [GR:pj] is_a: PO:0006361 ! palea of ear floret relationship: part_of PO:0006351 ! lower floret of sessile spikelet of ear [Term] id: PO:0006429 name: palea of upper floret of pedicellate spikelet of ear def: "The upper of the two bracts enclosing a flower in a maize ear pedicellate spikelet upper floret." [GR:pj] is_a: PO:0006361 ! palea of ear floret relationship: part_of PO:0006350 ! upper floret of pedicellate spikelet of ear [Term] id: PO:0006430 name: palea of lower floret of pedicellate spikelet of ear def: "The upper of the two bracts enclosing a flower in a maize ear pedicellate spikelet lower floret." [GR:pj] is_a: PO:0006361 ! palea of ear floret relationship: part_of PO:0006353 ! lower floret of pedicellate spikelet of ear [Term] id: PO:0006431 name: lemma of lower floret of pedicellate spikelet of ear def: "The lower of the two bracts enclosing a flower in a maize ear pedicellate spikelet lower floret." [GR:pj] is_a: PO:0006363 ! lemma of ear floret relationship: part_of PO:0006353 ! lower floret of pedicellate spikelet of ear [Term] id: PO:0006432 name: lemma of upper floret of pedicellate spikelet of ear def: "The lower of the two bracts enclosing a flower in a maize ear pedicellate spikelet upper floret." [GR:pj] is_a: PO:0006363 ! lemma of ear floret relationship: part_of PO:0006350 ! upper floret of pedicellate spikelet of ear [Term] id: PO:0006433 name: lemma of lower floret of sessile spikelet of ear def: "The lower of the two bracts enclosing a flower in a maize ear sessile spikelet lower floret." [GR:pj] is_a: PO:0006363 ! lemma of ear floret relationship: part_of PO:0006351 ! lower floret of sessile spikelet of ear [Term] id: PO:0006434 name: lemma of upper floret of sessile spikelet of ear def: "The lower of the two bracts enclosing a flower in a maize ear sessile spikelet upper floret." [GR:pj] is_a: PO:0006363 ! lemma of ear floret relationship: part_of PO:0006352 ! upper floret of sessile spikelet of ear [Term] id: PO:0006435 name: rachilla of pedicellate spikelet of ear def: "The axis of the ear pedicellate spikelet, above the glumes." [GR:pj] is_a: PO:0006380 ! ear spikelet rachilla relationship: part_of PO:0006348 ! ear pedicellate spikelet [Term] id: PO:0006436 name: rachilla of sessile spikelet of ear def: "The axis of the ear sessile spikelet, above the glumes." [GR:pj] is_a: PO:0006380 ! ear spikelet rachilla [Term] id: PO:0006437 name: lower glume of pedicellate spikelet of ear def: "The proximal/basal of the two glumes in the ear pedicellate spikelet." [GR:pj] is_a: PO:0006369 ! lower glume of ear spikelet relationship: part_of PO:0006348 ! ear pedicellate spikelet [Term] id: PO:0006438 name: lower glume of sessile spikelet of ear def: "The proximal/basal of the two glumes in the ear sessile spikelet." [GR:pj] is_a: PO:0006369 ! lower glume of ear spikelet relationship: part_of PO:0006349 ! ear sessile spikelet [Term] id: PO:0006439 name: upper glume of pedicellate spikelet of ear def: "The apical/distal of the two glumes in the pedicellate spikelet." [GR:pj] is_a: PO:0006371 ! upper glume of ear spikelet relationship: part_of PO:0006348 ! ear pedicellate spikelet [Term] id: PO:0006440 name: upper glume of sessile spikelet of ear def: "The apical/distal of the two glumes in the sessile spikelet." [GR:pj] is_a: PO:0006371 ! upper glume of ear spikelet relationship: part_of PO:0006349 ! ear sessile spikelet [Term] id: PO:0006441 name: stamen (sensu Poaceae) def: "A microsporophyll, bearing four microsporangia in a grass floret." [GR:pj] is_a: PO:0009029 ! stamen relationship: part_of PO:0006383 ! androecium (sensu Poaceae) [Term] id: PO:0006442 name: anther (sensu Poaceae) def: "The pollen-bearing part of a stamen of a grass floret." [GR:pj] is_a: PO:0009066 ! anther relationship: part_of PO:0006441 ! stamen (sensu Poaceae) [Term] id: PO:0006443 name: connective (sensu Poaceae) def: "The part of the stamen of a grass floret, that connects the microsporangia/pollen sacs." [GR:pj] is_a: PO:0009068 ! connective relationship: part_of PO:0006442 ! anther (sensu Poaceae) [Term] id: PO:0006444 name: microsporangium (sensu Poaceae) def: "Sporangium in the anther of a grass stamen producing microspores, usually many in number." [GR:pj] is_a: PO:0009070 ! microsporangium relationship: part_of PO:0006442 ! anther (sensu Poaceae) [Term] id: PO:0006445 name: anther wall (sensu Poaceae) def: "A multicellular layer with outer epidermis and an inner endothecium of an anther of a grass stamen." [GR:pj] is_a: PO:0000002 ! anther wall relationship: part_of PO:0006444 ! microsporangium (sensu Poaceae) [Term] id: PO:0006446 name: endothecium (sensu Poaceae) def: "The hypodermis of an anther sac of a grass stamen with distinctively thickened walls and involved in its dehiscence." [GR:pj] is_a: PO:0020002 ! endothecium relationship: part_of PO:0006445 ! anther wall (sensu Poaceae) [Term] id: PO:0006447 name: exothecium (sensu Poaceae) def: "The epidermis of an anther sac of a grass stamen." [GR:pj] is_a: PO:0020004 ! exothecium relationship: part_of PO:0006445 ! anther wall (sensu Poaceae) [Term] id: PO:0006448 name: placentoid (sensu Poaceae) def: "An inpushing of the anther wall of a grass stamen." [GR:pj] is_a: PO:0020005 ! placentoid relationship: part_of PO:0006445 ! anther wall (sensu Poaceae) [Term] id: PO:0006449 name: stomium (sensu Poaceae) def: "A fissure in the anther lobe through which the pollen is released in grasses." [GR:pj] is_a: PO:0020101 ! stomium relationship: part_of PO:0006445 ! anther wall (sensu Poaceae) [Term] id: PO:0006450 name: tapetum (sensu Poaceae) def: "Innermost part of the anther wall, involved in the nutrition of the pollen in grasses." [GR:pj] is_a: PO:0009071 ! tapetum relationship: part_of PO:0006445 ! anther wall (sensu Poaceae) [Term] id: PO:0006451 name: microsporocyte (sensu Poaceae) def: "A diploid (2n) cell that undergoes meiosis and produces four haploid (1n) microspores in a grass plant." [GR:pj] is_a: PO:0020047 ! microsporocyte relationship: part_of PO:0006444 ! microsporangium (sensu Poaceae) [Term] id: PO:0006452 name: microspore (sensu Poaceae) def: "The smaller, in general, of the two kinds of spores produced in the life cycle of a grass plant. It gives rise to the male gametophyte." [GR:pj] is_a: PO:0020048 ! microspore relationship: develops_from PO:0006451 ! microsporocyte (sensu Poaceae) [Term] id: PO:0006453 name: theca (sensu Poaceae) def: "A part of the anther of a grass stamen consisting of paired sporangia that dehisce down a common slit." [GR:pj] is_a: PO:0006444 ! microsporangium (sensu Poaceae) is_a: PO:0009069 ! theca [Term] id: PO:0006454 name: filament (sensu Poaceae) def: "The stalk of the stamen of a grass floret." [GR:pj] is_a: PO:0009067 ! filament relationship: part_of PO:0006441 ! stamen (sensu Poaceae) [Term] id: PO:0006455 name: carpel (sensu Poaceae) def: "A megasporophyll at the center of a grass floret enclosing the ovule." [GR:pj] is_a: PO:0009030 ! carpel relationship: part_of PO:0006384 ! gynoecium (sensu Poaceae) [Term] id: PO:0006456 name: ovary (sensu Poaceae) def: "The basal portion of a carpel that encloses the ovule(s) in a grass floret." [GR:pj] is_a: PO:0009072 ! ovary relationship: part_of PO:0006455 ! carpel (sensu Poaceae) [Term] id: PO:0006457 name: ovule (sensu Poaceae) def: "A stalked or sessile structure in a grass carpel within which one or more megaspores are formed and later the female gametophyte or embryo sac develops." [GR:pj] is_a: PO:0020003 ! ovule relationship: part_of PO:0006456 ! ovary (sensu Poaceae) [Term] id: PO:0006458 name: chalaza (sensu Poaceae) def: "Region in the grass ovule where the integuments and the nucellus merge with the funiculus." [GR:pj] is_a: PO:0020026 ! chalaza relationship: part_of PO:0006457 ! ovule (sensu Poaceae) [Term] id: PO:0006459 name: outer integumet (sensu Poaceae) def: "One of the two layers of tissue that usually covers the ovule of a grass, contiguous to the inner integument and usually involved in forming the micropyle at the apex." [GR:pj] is_a: PO:0020023 ! outer integument relationship: part_of PO:0006465 ! integument (sensu Poaceae) [Term] id: PO:0006460 name: inner integument (sensu Poaceae) def: "The innermost of the two layers of tissue that cover the ovule of a grass, contiguous to the nucellus and usually involved in forming the micropyle at the apex." [GR:pj] is_a: PO:0020022 ! inner integument relationship: part_of PO:0006465 ! integument (sensu Poaceae) [Term] id: PO:0006461 name: micropyle (sensu Poaceae) def: "A small canal through the inner integument(s) at the apex of a grass ovule." [GR:pj] is_a: PO:0020025 ! micropyle relationship: part_of PO:0006457 ! ovule (sensu Poaceae) [Term] id: PO:0006462 name: nucellus (sensu Poaceae) def: "Subepidermal tissue in the ovule of a grass plant surrounding the megasporocyte." [GR:pj] is_a: PO:0020020 ! nucellus relationship: part_of PO:0006457 ! ovule (sensu Poaceae) [Term] id: PO:0006463 name: megasporocyte (sensu Poaceae) def: "A diploid (2n) cell that undergoes meiosis and produces four haploid (1n) megaspores in a grass plant." [GR:pj] is_a: PO:0000431 ! megasporocyte relationship: part_of PO:0006462 ! nucellus (sensu Poaceae) [Term] id: PO:0006464 name: megaspore (sensu Poaceae) def: "The larger, in general, of the two kinds of spores produced after meiosis in the life cycle of a grass plant, and on germination giving rise to the female gametophyte (embryo sac)." [GR:pj] is_a: PO:0020019 ! megaspore relationship: develops_from PO:0006463 ! megasporocyte (sensu Poaceae) [Term] id: PO:0006465 name: integument (sensu Poaceae) def: "One of the layers of tissue that covers the ovule of a grass carpel, enveloping the nucellus and forming the micropyle at the apex." [GR:pj] is_a: PO:0020021 ! integument relationship: part_of PO:0006457 ! ovule (sensu Poaceae) [Term] id: PO:0006466 name: funicle (sensu Poaceae) def: "The stalk which attaches the ovule to the placenta in a grass carpel." [GR:pj] is_a: PO:0020006 ! funicle relationship: part_of PO:0006456 ! ovary (sensu Poaceae) [Term] id: PO:0006467 name: ovary placenta (sensu Poaceae) def: "The region within an ovary to which ovules are attached in a grass carpel." [GR:pj] is_a: PO:0020001 ! ovary placenta relationship: part_of PO:0006456 ! ovary (sensu Poaceae) [Term] id: PO:0006468 name: stigma (sensu Poaceae) def: "The apical part of a carpel of a grass floret on which the pollen germinates." [GR:pj] is_a: PO:0009073 ! stigma relationship: part_of PO:0006455 ! carpel (sensu Poaceae) [Term] id: PO:0006469 name: style (sensu Poaceae) def: "An elongated part of a carpel between the ovary and the stigma of a grass floret, through which the pollen tube grows." [GR:pj] is_a: PO:0009074 ! style relationship: part_of PO:0006455 ! carpel (sensu Poaceae) [Term] id: PO:0006470 name: carpel (sensu Zea) def: "A megasporophyll at the center of a maize floret enclosing the ovule." [GR:pj] is_a: PO:0006455 ! carpel (sensu Poaceae) relationship: part_of PO:0006365 ! gynoecium of ear floret [Term] id: PO:0006471 name: androecium (sensu Zea) def: "Collectively the stamens of one floret of a maize plant." [GR:pj] is_a: PO:0006383 ! androecium (sensu Poaceae) [Term] id: PO:0006472 name: stamen (sensu Zea) def: "A microsporophyll bearing four microsporangia in a maize floret." [GR:pj] is_a: PO:0006441 ! stamen (sensu Poaceae) relationship: part_of PO:0006366 ! androecium of tassel floret [Term] id: PO:0006473 name: anther (sensu Zea) def: "The pollen-bearing part of a stamen of a maize floret." [GR:pj] is_a: PO:0006442 ! anther (sensu Poaceae) relationship: part_of PO:0006472 ! stamen (sensu Zea) [Term] id: PO:0006474 name: filament (sensu Zea) def: "The stalk of the stamen of a maize floret." [GR:pj] is_a: PO:0006454 ! filament (sensu Poaceae) relationship: part_of PO:0006472 ! stamen (sensu Zea) [Term] id: PO:0006475 name: connective (sensu Zea) def: "The part of the stamen of a maize floret, that connects the microsporangia or pollen sacs." [GR:pj] is_a: PO:0006443 ! connective (sensu Poaceae) relationship: part_of PO:0006473 ! anther (sensu Zea) [Term] id: PO:0006476 name: microsporangium (sensu Zea) def: "Sporangium in the anther of a maize stamen producing microspores, usually many in number ." [GR:pj] is_a: PO:0006444 ! microsporangium (sensu Poaceae) relationship: part_of PO:0006473 ! anther (sensu Zea) [Term] id: PO:0006477 name: anther wall (sensu Zea) def: "A multicellular layer with outer epidermis and an inner endothecium of an anther of a maize stamen." [GR:pj] is_a: PO:0006445 ! anther wall (sensu Poaceae) relationship: part_of PO:0006476 ! microsporangium (sensu Zea) [Term] id: PO:0006478 name: theca (sensu Zea) def: "A part of the anther of a maize stamen consisting of paired sporangia that dehisce down a common slit." [GR:pj] is_a: PO:0006453 ! theca (sensu Poaceae) is_a: PO:0006476 ! microsporangium (sensu Zea) [Term] id: PO:0006479 name: microsporocyte (sensu Zea) def: "A diploid (2n) cell that undergoes meiosis and produces four haploid (1n) microspores in a maize plant." [GR:pj] is_a: PO:0006451 ! microsporocyte (sensu Poaceae) relationship: part_of PO:0006476 ! microsporangium (sensu Zea) [Term] id: PO:0006480 name: microspore (sensu Zea) def: "The smaller, in general, of the two kinds of spores produced in the life cycle of a maize plant. It gives rise to the male gametophyte." [GR:pj] is_a: PO:0006452 ! microspore (sensu Poaceae) relationship: develops_from PO:0006479 ! microsporocyte (sensu Zea) [Term] id: PO:0006481 name: endothecium (sensu Zea) def: "The hypodermis of an anther sac of a maize stamen with distinctively thickened walls and involved in its dehiscence." [GR:pj] is_a: PO:0006446 ! endothecium (sensu Poaceae) relationship: part_of PO:0006477 ! anther wall (sensu Zea) [Term] id: PO:0006482 name: exothecium (sensu Zea) def: "The epidermis of an anther sac of a maize stamen." [GR:pj] is_a: PO:0006447 ! exothecium (sensu Poaceae) relationship: part_of PO:0006477 ! anther wall (sensu Zea) [Term] id: PO:0006483 name: placentoid (sensu Zea) def: "An inpushing of the anther wall of a maize stamen." [GR:pj] is_a: PO:0006448 ! placentoid (sensu Poaceae) relationship: part_of PO:0006477 ! anther wall (sensu Zea) [Term] id: PO:0006484 name: tapetum (sensu Zea) def: "Innermost part of the anther wall, involved in the nutrition of the pollen in maize." [GR:pj] is_a: PO:0006450 ! tapetum (sensu Poaceae) relationship: part_of PO:0006477 ! anther wall (sensu Zea) [Term] id: PO:0006485 name: stomium (sensu Zea) def: "A fissure in the anther lobe through which the pollen is released in maize." [GR:pj] is_a: PO:0006449 ! stomium (sensu Poaceae) relationship: part_of PO:0006477 ! anther wall (sensu Zea) [Term] id: PO:0006486 name: ovary (sensu Zea) def: "The basal portion of a carpel that encloses the ovule(s) in a maize floret." [GR:pj] is_a: PO:0006456 ! ovary (sensu Poaceae) relationship: part_of PO:0006470 ! carpel (sensu Zea) [Term] id: PO:0006487 name: stigma (sensu Zea) def: "The apical part of a carpel of a maize floret on which the pollen germinates." [GR:pj] is_a: PO:0006468 ! stigma (sensu Poaceae) relationship: part_of PO:0006470 ! carpel (sensu Zea) [Term] id: PO:0006488 name: silk def: "The style of a maize floret." [GR:pj] synonym: "style (sensu Zea)" RELATED [] is_a: PO:0006469 ! style (sensu Poaceae) relationship: part_of PO:0006470 ! carpel (sensu Zea) [Term] id: PO:0006489 name: funicle (sensu Zea) def: "The stalk which attaches the ovule to the placenta in a maize carpel." [GR:pj] is_a: PO:0006466 ! funicle (sensu Poaceae) relationship: part_of PO:0006486 ! ovary (sensu Zea) [Term] id: PO:0006490 name: ovary placenta (sensu Zea) def: "The region within an ovary to which ovules are attached in a maize carpel." [GR:pj] is_a: PO:0006467 ! ovary placenta (sensu Poaceae) relationship: part_of PO:0006486 ! ovary (sensu Zea) [Term] id: PO:0006491 name: ovule (sensu Zea) def: "A stalked or sessile structure in a maize carpel within which one or more megaspores are formed and later the female gametophyte or embryo sac develops." [GR:pj] is_a: PO:0006457 ! ovule (sensu Poaceae) relationship: part_of PO:0006486 ! ovary (sensu Zea) [Term] id: PO:0006492 name: nucellus (sensu Zea) def: "Subepidermal tissue in the ovule of a maize plant surrounding the megasporocyte." [GR:pj] is_a: PO:0006462 ! nucellus (sensu Poaceae) relationship: part_of PO:0006491 ! ovule (sensu Zea) [Term] id: PO:0006493 name: megasporocyte (sensu Zea) def: "A diploid (2n) cell that undergoes meiosis and produces four haploid (1n) megaspores in a maize plant." [GR:pj] is_a: PO:0006463 ! megasporocyte (sensu Poaceae) relationship: part_of PO:0006492 ! nucellus (sensu Zea) [Term] id: PO:0006494 name: megaspore (sensu Zea) def: "The larger, in general, of the two kinds of spores produced after meiosis in the life cycle of a maize plant, and on germination giving rise to the female gametophyte (embryo sac)." [GR:pj] is_a: PO:0006464 ! megaspore (sensu Poaceae) relationship: develops_from PO:0006493 ! megasporocyte (sensu Zea) [Term] id: PO:0006495 name: degenerate megaspore (sensu Poaceae) def: "The megaspores in a grass plant that would not participate in megagametogenesis." [GR:pj] is_a: PO:0000245 ! degenerate megaspore is_a: PO:0006464 ! megaspore (sensu Poaceae) [Term] id: PO:0006496 name: functional megaspore (sensu Poaceae) def: "The megaspore that forms the embryo sac in grasses." [GR:pj] is_a: PO:0000244 ! functional megaspore is_a: PO:0006464 ! megaspore (sensu Poaceae) [Term] id: PO:0006497 name: stigma epidermis (sensu Poaceae) def: "The epidermal cell layer of the grass stigma." [GR:pj] is_a: PO:0006061 ! stigma epidermis relationship: part_of PO:0006468 ! stigma (sensu Poaceae) [Term] id: PO:0006498 name: style epidermis (sensu Poaceae) def: "The epidermal cell layer of the style of a grass carpel." [GR:pj] is_a: PO:0006062 ! style epidermis relationship: part_of PO:0006469 ! style (sensu Poaceae) [Term] id: PO:0006499 name: transmitting tissue (sensu Poaceae) def: "Tissue in the style of a grass carpel, through which the pollen tube grows; it connects the stigma and the inside of ovary." [GR:pj] is_a: PO:0020102 ! portion of transmitting tissue relationship: part_of PO:0006469 ! style (sensu Poaceae) [Term] id: PO:0006500 name: ovary epidermis (sensu Poaceae) def: "The epidermal cell layer of the ovary of a grass carpel." [GR:pj] is_a: PO:0006063 ! ovary epidermis relationship: part_of PO:0006456 ! ovary (sensu Poaceae) [Term] id: PO:0006501 name: leaf abscission zone def: "Zone at base of the leaf that contains an abscission (or separation) layer and a protective layer, both involved in the abscission of the leaf." [GR:pj] is_a: PO:0000146 ! abscission zone relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0006502 name: flower abscission zone def: "Zone at base of the flower that contains an abscission (or separation) layer and a protective layer, both involved in the abscission of the flower and its parts." [GR:pj] is_a: PO:0000146 ! abscission zone relationship: part_of PO:0009046 ! flower [Term] id: PO:0006503 name: fruit abscission zone def: "Zone at base of the fruit that contains an abscission (or separation) layer and a protective layer, both involved in the abscission of the fruit." [GR:pj] subset: Maize subset: Poaceae subset: Rice subset: Tomato is_a: PO:0000146 ! abscission zone relationship: part_of PO:0009001 ! fruit [Term] id: PO:0006504 name: leaf trichome def: "Trichome on/from the epidermis of a leaf." [GR:pj] is_a: PO:0000282 ! trichome relationship: part_of PO:0000049 ! leaf lamina abaxial epidermis relationship: part_of PO:0000050 ! leaf lamina adaxial epidermis relationship: part_of PO:0006018 ! leaf adaxial epidermis relationship: part_of PO:0006019 ! leaf abaxial epidermis [Term] id: PO:0006505 name: central spike of ear def: "The inflorescence axis of the ear." [GR:pj] synonym: "cob (sensu zea)" RELATED [] synonym: "ear rachis" RELATED [] is_a: PO:0020122 ! inflorescence axis relationship: part_of PO:0020136 ! ear (sensu Zea) [Term] id: PO:0006506 name: chalaza (sensu Zea) def: "Region in the maize ovule where the integuments and the nucellus merge with the funiculus." [GR:pj] is_a: PO:0006458 ! chalaza (sensu Poaceae) relationship: part_of PO:0006491 ! ovule (sensu Zea) [Term] id: PO:0006507 name: integument (sensu Zea) def: "One of the layers of tissue that covers the ovule of a maize carpel, enveloping the nucellus and forming the micropyle at the apex." [GR:pj] is_a: PO:0006465 ! integument (sensu Poaceae) relationship: part_of PO:0006491 ! ovule (sensu Zea) [Term] id: PO:0006508 name: integument epidermis (sensu Poaceae) def: "The epidermis of an integument in a grass ovule." [GR:pj] is_a: PO:0006043 ! integument epidermis relationship: part_of PO:0006465 ! integument (sensu Poaceae) [Term] id: PO:0008001 name: fruit distal end def: "The end distal from the fruit pedicel." [(SGN:nm), GR:ap] subset: Tomato synonym: "blossom end" RELATED [] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009001 ! fruit [Term] id: PO:0008002 name: fruit proximal end def: "The stem end of the fruit." [(SGN:nm), GR:ap] subset: Tomato synonym: "fruit shoulders" RELATED [] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009001 ! fruit [Term] id: PO:0008003 name: fruit vascular system def: "Vascular system of the fruit." [(SGN:nm), GR:ap] subset: Arabidopsis subset: Maize subset: Poaceae subset: Rice subset: Tomato is_a: PO:0000034 ! vascular system relationship: part_of PO:0009001 ! fruit [Term] id: PO:0008004 name: fruit aleurone layer def: "An aleurone layer of the grass caryopsis, its cells being characterized by presence of protein bodies containing seed storage proteins." [GR:ap] xref: OBO_SF_PO:2903966 is_a: PO:0005360 ! aleurone layer relationship: part_of PO:0009001 ! fruit [Term] id: PO:0008005 name: fruit nucellus def: "A nucellus in the grass caryopsis." [GR:ap] subset: Poaceae subset: Rice xref: OBO_SF_PO:2903966 is_a: PO:0020020 ! nucellus relationship: part_of PO:0009001 ! fruit [Term] id: PO:0008006 name: nucellar epidermis def: "A portion of plant tissue that is the morphologically distinct outer layer of the nucellus." [GR:ap] subset: Poaceae subset: Rice is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0020020 ! nucellus [Term] id: PO:0008007 name: nucellar projection def: "A portion of plant tissue that is the morphologically distinct portion of the nucellus overlying the vascular strands in the grass caryopsis." [GR:ap] subset: Poaceae subset: Rice is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0020020 ! nucellus [Term] id: PO:0008008 name: modified aleurone def: "A morphologically distinct aleurone layer located adjacent to the nucellar projection." [GR:ap] subset: Poaceae subset: Rice is_a: PO:0005360 ! aleurone layer relationship: part_of PO:0008004 ! fruit aleurone layer [Term] id: PO:0008009 name: abaxial nucellar projection def: "A portion of plant tissue that is the abaxial/lower portion of the nucellus overlying the vascular strands in the grass caryopsis." [GR:ap] subset: Poaceae subset: Rice is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0008007 ! nucellar projection [Term] id: PO:0008010 name: adaxial nucellar projection def: "A portion of plant tissue that is the adaxial/upper portion of the nucellus overlying the vascular strands in the grass caryopsis." [GR:ap] subset: Poaceae subset: Rice is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0008007 ! nucellar projection [Term] id: PO:0008011 name: embryo vascular system def: "Vascular system of embryo." [GR:cwt] is_a: PO:0000034 ! vascular system relationship: part_of PO:0009009 ! embryo [Term] id: PO:0008012 name: stigma vascular system def: "Vascular system of stigma." [GR:cwt] synonym: "stigma vein" RELATED [] is_a: PO:0005017 ! flower vascular system relationship: part_of PO:0005019 ! carpel vascular system [Term] id: PO:0008013 name: anther vascular system def: "Vascular system of the anther." [GR:cwt] is_a: PO:0005017 ! flower vascular system relationship: part_of PO:0005018 ! stamen vascular system [Term] id: PO:0008014 name: filament vascular system def: "Vascular system of filament in the stamen." [GR:cwt] synonym: "filament vein" RELATED [] is_a: PO:0005017 ! flower vascular system relationship: part_of PO:0005018 ! stamen vascular system [Term] id: PO:0008015 name: hypocotyl vascular system def: "Vascular system of the hypocotyl." [GR:cwt] is_a: PO:0000034 ! vascular system relationship: part_of PO:0020100 ! hypocotyl [Term] id: PO:0008016 name: vegetative shoot apical meristem def: "A shoot apical meristem that gives rise to the apical growth of vegetative tissues and organs." [GR:cwt] synonym: "vegetative meristem" RELATED [] is_a: PO:0020148 ! shoot apical meristem [Term] id: PO:0008017 name: leaf sheath pulvinus def: "A more or less abrupt swelling, especially at the apex or base of a leaf sheath." [GR:cwt] is_a: PO:0009000 ! pulvinus relationship: part_of PO:0020104 ! leaf sheath [Term] id: PO:0008018 name: transition leaf def: "A leaf that is part of an heteroblastic series, and is characterized by anatomical features that are intermediate between juvenile and adult leaves." [GR:cwt] is_a: PO:0009025 ! vascular leaf [Term] id: PO:0008019 name: leaf lamina base def: "The region of the leaf lamina proximal to the stem and usually connected to it by means of a petiole." [GR:cwt] is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020039 ! leaf lamina [Term] id: PO:0008020 name: central zone of the leaf lamina def: "Region that includes the widest or majority portion of leaf lamina and that does not include leaf apex and leaf lamina base." [GR:cwt] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020039 ! leaf lamina [Term] id: PO:0008021 name: tertiary vein def: "A leaf vein arising from a secondary vein." [GR:cwt] synonym: "third order leaf vein" RELATED [] is_a: PO:0020138 ! leaf vein [Term] id: PO:0008022 name: quaternary vein def: "A leaf vein arising from a tertiary vein." [GR:cwt] synonym: "fourth order leaf vein" RELATED [] is_a: PO:0020138 ! leaf vein [Term] id: PO:0008023 name: higher order vein def: "A leaf vein arising from a quaternary or higher vein order." [GR:cwt] synonym: "fifth and higher order leaf vein" RELATED [] is_a: PO:0020138 ! leaf vein [Term] id: PO:0008024 name: petiole proximal end def: "The region of the petiole proximal to its stem attachment site." [GR:cwt] synonym: "petiole base" RELATED [] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020038 ! petiole [Term] id: PO:0008025 name: central zone of the petiole def: "Regions of the petiole that does not include petiole distal end and petiole proximal end." [GR:cwt] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020038 ! petiole [Term] id: PO:0008026 name: petiole distal end def: "The region of the petiole distal to its stem attachment site or proximal to the leaf lamina." [GR:cwt] synonym: "petiole apex" RELATED [] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020038 ! petiole [Term] id: PO:0008027 name: petiole adaxial epidermis def: "A portion of leaf epidermis that covers the adaxial/upper surface of the petiole." [GR:cwt] is_a: PO:0006016 ! leaf epidermis relationship: part_of PO:0000051 ! petiole epidermis [Term] id: PO:0008028 name: reproductive shoot apical meristem def: "A shoot apical meristem that gives rise to the apical growth of reproductive tissues and organs." [GR:cwt] is_a: PO:0020148 ! shoot apical meristem [Term] id: PO:0008029 name: petiole abaxial epidermis def: "A portion of leaf epidermis that covers the abaxial/lower surface of the petiole." [GR:cwt] is_a: PO:0006016 ! leaf epidermis relationship: part_of PO:0000051 ! petiole epidermis [Term] id: PO:0008030 name: trichome cell def: "A cell that is part of a trichome." [GR:cwt] is_a: PO:0009002 ! plant cell relationship: part_of PO:0000282 ! trichome [Term] id: PO:0008031 name: trichome branch def: "The branch on a trichome." [GR:cwt] relationship: part_of PO:0000282 ! trichome [Term] id: PO:0008032 name: stomatal pore def: "The space of variable size controlled by stomatal guard cells in response to environmental clues." [GR:cwt] synonym: "stomatal aperture" RELATED [] relationship: part_of PO:0002000 ! stomatal complex [Term] id: PO:0008034 name: leaf whorl def: "A cluster of leaves in crowded circles or spirals arising basally from a crown." [GR:cwt] comment: This term was made obsolete, because its definition did not match the new ontology structure as a child of collective phyllome structure. Annotations for this term are now associated with the new term collective leaf structure (PO:0025022). synonym: "rosette" RELATED [] is_obsolete: true replaced_by: PO:0025022 [Term] id: PO:0008035 name: plerome def: "A meristem forming the core of the axis composed of the primary vascular tissues and associated ground tissue, such as pith and interfascicular regions." [ISBN:0471245208 "Anatomy of seed plants by K.Esau [2nd Edition]"] is_a: PO:0009013 ! meristem [Term] id: PO:0008036 name: periblem def: "A meristem that forms the cortex." [ISBN:0471245208 "Anatomy of seed plants by K. Esau [2nd edition]"] is_a: PO:0009013 ! meristem [Term] id: PO:0008037 name: seedling def: "A young plant derived from a newly germinated seed." [GR:cwt] comment: Replaced by whole plant growth stage 'seedling growth stage' (PO:0007131), and whole plant (PO:0000003). xref: OBO_SF_PO:2972241 is_obsolete: true replaced_by: PO:0000003 [Term] id: PO:0008038 name: adventitious root primordium def: "An organized group of cells that will differentiate into adventitious root." [GR:cwt] is_a: PO:0005029 ! root primordium [Term] id: PO:0008039 name: stem base def: "The basal part of stem." [GR:cwt] is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009047 ! stem [Term] id: PO:0008040 name: lodicule primordium def: "The primordium will differentiat into lodicule." [GR:cwt] is_a: PO:0009036 ! lodicule [Term] id: PO:0008041 name: stem internode elongation zone def: "Zone of pronounced cell elongation in stem internode." [GR:cwt "PMID:14520573"] is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020142 ! stem internode [Term] id: PO:0008042 name: stem internode differentiation zone def: "Region in stem internode where cells are becoming specialized to form cortex, endodermis, or vascular tissue." [GR:cwt "PMID:14520573"] is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020142 ! stem internode [Term] id: PO:0008043 name: floral epidermis def: "A portion of shoot epidermis that is part of the floral organs." [GR:cwt] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0009046 ! flower [Term] id: PO:0008044 name: floral stomatal complex def: "An opening pore on the epidermis of floral organs bordered by two guard cells and serving in gas exchange." [GR:cwt] relationship: part_of PO:0008043 ! floral epidermis [Term] id: PO:0008045 name: floral guard cell def: "One of a pair of cells flanking the stomatal pore of floral organs." [GR:cwt] is_a: PO:0000293 ! guard cell relationship: part_of PO:0008044 ! floral stomatal complex [Term] id: PO:0008046 name: floral stomatal pore def: "The space of variable size controlled by floral stomatal guard cells in response to environmental clues." [GR:cwt] relationship: part_of PO:0008044 ! floral stomatal complex [Term] id: PO:0008047 name: scutellar vascular system def: "A vascular system in a scutellum." [GR:cwt] synonym: "scutellum vascular system" RELATED [] is_a: PO:0000034 ! vascular system relationship: part_of PO:0008011 ! embryo vascular system relationship: part_of PO:0020110 ! scutellum [Term] id: PO:0008048 name: scutellar epithelium def: "A continuous layer of cylindrical cells covering the endosperm side of the scutellum. Thought to act as a secretory and absortive organ." [GR:cwt] synonym: "scutellum epithelium" RELATED [] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0020110 ! scutellum [Term] id: PO:0009000 name: pulvinus def: "A cardinal organ part at the apex or base of a petiole, petiolule, leaf sheath, or branch that is differentiated from the remaining organ parts by its enlarged cross section." [POC:curators] comment: Often glandular. Often involved in movement of a plant structure in response to touch, gravity or light. In panicoid grasses a swollen region in the stem above the intercalary meristem. Such a definition would also include stems of Chloranthaceae, Acanthaceae, Caryophyllaceae, Amaranthaceae, etc., [source: APWeb:Glossary]. xref: PATO:0000586 "increased size, enlarged" xref: OBO_SF_PO:2971884 xref: OBO_SF_PO:2972236 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009006 ! shoot system [Term] id: PO:0009001 name: fruit alt_id: PO:0020067 alt_id: PO:0020068 alt_id: PO:0020069 alt_id: PO:0020070 alt_id: PO:0020071 alt_id: PO:0020072 alt_id: PO:0020073 alt_id: PO:0020074 alt_id: PO:0020076 alt_id: PO:0020077 alt_id: PO:0020078 alt_id: PO:0020079 alt_id: PO:0020080 alt_id: PO:0020082 alt_id: PO:0020083 alt_id: PO:0020087 alt_id: PO:0020107 def: "A collective plant structure containing one or more embryos, which as a whole, develops from a gynoecium." [POC:curators] comment: A fruit may contain additional plant structures that were part of the flower that mature along with the gynoecium, such as a receptacle. A fruit may develop without fertilization in cases of parthenocarpy, apomixis, or other hormone-induced conditions. Fruits only occur in angiosperms. subset: Arabidopsis subset: Maize subset: Poaceae subset: Rice synonym: "achene" NARROW [] synonym: "berry" NARROW [] synonym: "capsule" NARROW [] synonym: "caryopsis" NARROW [] synonym: "circumcissile capsule" NARROW [] synonym: "cypsela" NARROW [] synonym: "drupe" NARROW [] synonym: "follicle" NARROW [] synonym: "grain" NARROW [] synonym: "kernel" NARROW [] synonym: "legume" NARROW [] synonym: "loculicidal capsule" NARROW [] synonym: "lomentum" NARROW [] synonym: "nut" NARROW [] synonym: "pod" NARROW [] synonym: "pome" NARROW [] synonym: "poricidal capsule" NARROW [] synonym: "schizocarp" NARROW [] synonym: "septicidal capsule" NARROW [] synonym: "septifragal capsule" NARROW [] synonym: "silicula" NARROW [] synonym: "siliqua" NARROW [] synonym: "silique" NARROW [] xref: OBO_SF_PO:2972169 is_a: PO:0025007 ! collective plant structure relationship: develops_from PO:0009062 ! gynoecium [Term] id: PO:0009002 name: plant cell def: "A cell that is part of a plant and that has as its parts a plant cell wall." [GO:0005623, GR:pj, ISBN:0471245208, POC:curators] comment: Applies to cells that are living or dead at maturity (e.g., fiber cell or tracheid). Definition of cell GO:0005623: "The basic structural and functional unit of all organisms. Includes the plasma membrane and any external encapsulating structures such as the cell wall and cell envelope". See definition of plant-type cell wall GO:0009505. Egg and sperm cells lack the cell wall. subset: reference xref: CL:0000610 xref: OBO_SF_PO:2932524 is_a: PO:0009011 ! plant structure relationship: part_of PO:0000003 ! whole plant [Term] id: PO:0009003 name: sporophyte def: "A plant structure that is a product of fertilization and produces spores through meiosis." [POC:curators] comment: Replaced_by sporophytic phase (PO:0028003). Structures that only occur in sporophyte should have participates_in relation to sporophytic phase. subset: reference xref: OBO_SF_PO:2968332 is_obsolete: true consider: PO:0000003 [Term] id: PO:0009004 name: gametophyte def: "A plant structure that arises through meiosis and may produce gametes by mitosis." [POC:curators] comment: Replaced_by gametophytic phase (PO:0028002). The gametophyte arises from the product of meiosis (the spore). Structures that occur only in gametophytes should have a participates_in relation to the gametophytic phase. subset: reference xref: OBO_SF_PO:2968330 is_obsolete: true consider: PO:0000003 consider: PO:0020091 consider: PO:0020092 [Term] id: PO:0009005 name: root alt_id: PO:0003006 def: "A plant axis that is part of a root system." [POC:curators] comment: Commonly thought of as one of the three basic parts of the seed plant body. A plant stucture that is usually underground and does not bear leaves and only rarely shoots, is usually more or less positively geotropic, is endogenous in origin, indeterminate in growth and often with secondary thickening. subset: reference synonym: "aerial root" NARROW [] is_a: PO:0025004 ! plant axis relationship: part_of PO:0025025 ! root system [Term] id: PO:0009006 name: shoot system def: "A collective plant structure that produces shoot apical meristems and the plant structures that arise from them." [POC:curators] comment: Generally the above ground portion of a plant. subset: reference synonym: "crown (sensu Poaceae)" RELATED [] synonym: "shoot" RELATED [] synonym: "tree crown" NARROW [] xref: OBO_SF_PO:3011039 is_a: PO:0025007 ! collective plant structure [Term] id: PO:0009007 name: portion of plant tissue def: "A plant structure that has as its parts multiple cells and is a proper part of an organ." [POC:curators, TAIR:lr] comment: These cells are organized into a structural unit, and may include an intercellular matrix. subset: reference synonym: "plant tissue" RELATED [] xref: OBO_SF_PO:2944945 is_a: PO:0009011 ! plant structure relationship: part_of PO:0000003 ! whole plant [Term] id: PO:0009008 name: plant organ def: "A plant structure that is a functional unit, is a proper part of a plant, and includes portions of tissues of at least two different types that derive from a common developmental path." [POC:curators] comment: Examples: stem, leaf, root. May include individual cell types that are not part of tissues (e.g.: idioblasts). synonym: "compound plant organ" RELATED [] synonym: "simple plant organ" RELATED [PATO:01503] xref: OBO_SF_PO:2932521 is_a: PO:0009011 ! plant structure relationship: part_of PO:0000003 ! whole plant [Term] id: PO:0009009 name: embryo def: "A whole plant in the post-zygotic stage that does not yet consist of fully differentiated tissues." [POC:curators] comment: Adventitious embryos and somatic embryos do not arise from zygotes. Cultured embryos (PO:0000010), including haploid embryos, are in vitro plant structures. Embryos occur prior to germination in vascular plants. synonym: "germ" RELATED [] xref: OBO_SF_PO:2982384 is_a: PO:0000003 ! whole plant [Term] id: PO:0009010 name: seed def: "A propagating organ formed in the reproductive cycle of gymnosperms and angiosperms, derived from the ovule and enclosing an embryo." [APWeb:Glossary, GR:pj] comment: The seed is representative of a next generation of sporophyte. subset: Arabidopsis subset: Citrus subset: Maize subset: Poaceae subset: Rice subset: Tomato is_a: PO:0000003 ! whole plant relationship: part_of PO:0009001 ! fruit [Term] id: PO:0009011 name: plant structure def: "An anatomical structure that is or was part of a plant, or was derived from a part of a plant." [Poc:curators] comment: 'Part' includes both proper parts and the whole plant. xref: CARO:0000003 "anatomical structure" xref: OBO_SF_PO:2932527 [Term] id: PO:0009013 name: meristem def: "A portion of plant tissue in which cells have retained their embryonic characteristics, or have reverted to them secondarily, and that divide to produce new cells that can undergo differentiation to form mature tissues, i.e. they have a capacity for morphogenesis and growth." [APWeb:Glossary, GR:pj] synonym: "meristematic tissue" EXACT [] synonym: "portion of meristem tissue" EXACT [] is_a: PO:0009007 ! portion of plant tissue [Term] id: PO:0009014 name: dermal tissue def: "A portion of plant tissue that covers the surface of the plant." [GR:pj, ISBN:0122151704] comment: This term is redundant with epidermis and will be obsoleted.\nMove annotations to epidermis. xref: OBO_SF_PO:3008008 is_obsolete: true replaced_by: PO:0005679 [Term] id: PO:0009015 name: portion of vascular tissue def: "A portion of plant tissue that has parts xylem and phloem." [APweb:Glossary] comment: Functions in conduction and support. In the stem it is often found as a stele, surrounded by the cortex and surrounding the pith. synonym: "vascular system" RELATED [] xref: BTO:0001432 "vascular tissue" is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0005020 ! vascular bundle [Term] id: PO:0009016 name: ground tissue def: "OBSOLETE. Tissues other than the vascular tissues, epidermis and the periderm." [GR:pj] comment: Uninformative definition. Check it again. is_obsolete: true [Term] id: PO:0009017 name: inflorescence branch pulvinus def: "Pulvinus of an inflorescence branch." [GR:cwt] is_a: PO:0009000 ! pulvinus relationship: part_of PO:0009081 ! inflorescence branch [Term] id: PO:0009018 name: basal endosperm transfer cell def: "A transfer cell found in endosperm, responsible for passing through all nutrients entering the seeds by symplastic or apoplastic methods." [GR:cwt] is_a: PO:0000078 ! transfer cell relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0009019 name: basal endosperm transfer layer def: "A cell layer found in basal endosperm transfer cell." [GR:cwt] relationship: part_of PO:0009018 ! basal endosperm transfer cell [Term] id: PO:0009020 name: meristem L1 def: "The outermost layer of a shoot apical meristem that gives rise to a shoot epidermis." [GR:pj, PMID:12221985] is_a: PO:0009013 ! meristem relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0009021 name: meristem L2 def: "A cell layer directly beneath a meristem L1 layer in a shoot apical meristem which gives rise to subepidermal tissue." [GR:pj, PMID:12221985] is_a: PO:0009013 ! meristem relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0009022 name: meristem L3 def: "A multicellular layer beneath a mersistem L2 layer in a shoot apical meristem which gives rise to internal tissues of leaf and stem." [GR:pj, PMID:12221985] is_a: PO:0009013 ! meristem relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0009023 name: leaf axil def: "The angle between the petiole of a leaf and the stem to which it is attached." [GR:cwt] xref: OBO_SF_PO:3007368 relationship: part_of PO:0020040 ! leaf base [Term] id: PO:0009024 name: stylar ridge of lower floret of pedicellate spikelet of ear xref: OBO_SF_PO:2959654 relationship: part_of PO:0006424 ! gynoecium of lower floret of pedicellate spikelet of ear [Term] id: PO:0009025 name: vascular leaf def: "A leaf in a vascular plant." [POC:curators] comment: In angiosperms, commonly thought of as one of the three basic parts of the seed plant body, a structure usually of determinate growth, without secondary thickening, and of superficial origin, often flattened and photosynthetic in part, and in the axil of which is found a bud (APweb Glossary). Occurs in the sporophytic phase of a plant life cycle. subset: reference synonym: "foliage leaf" RELATED [] is_a: PO:0025034 ! leaf [Term] id: PO:0009026 name: sporophyll def: "A leaf-like organ on which one or more sporangia are borne." [APWeb:Glossary] subset: reference is_a: PO:0006001 ! phyllome [Term] id: PO:0009027 name: megasporophyll def: "A structure upon which (or in the axil of which) one or more megasporangia are borne; in flowering plants, a carpel." [APWeb:Glossary] is_a: PO:0009026 ! sporophyll [Term] id: PO:0009028 name: microsporophyll def: "A structure on which one or more microsporangia are borne; in flowering plants, the stamen." [APWeb:Glossary] is_a: PO:0009026 ! sporophyll [Term] id: PO:0009029 name: stamen def: "A microsporophyll bearing one or more microsporangia." [APWeb:Glossary] subset: reference is_a: PO:0009028 ! microsporophyll relationship: part_of PO:0009061 ! androecium [Term] id: PO:0009030 name: carpel def: "A megasporophyll, almost always at the center of a flower, its margins more or less fused together or with other carpels to enclose the ovule(s)." [APWeb:Glossary] comment: If carpels are fused, the gynoecium is a syncarpous gynoecium, as in Poaceae, Brassicaceae and Solanaceae.  If carpels are free, the gynoecium is an apocarpous gynoecium, as in Fabaceae. subset: reference is_a: PO:0009027 ! megasporophyll relationship: part_of PO:0009062 ! gynoecium [Term] id: PO:0009031 name: sepal def: "A member of the (usually green) outer whorl of non-fertile parts surrounding the fertile organs of a flower." [APWeb:Glossary] subset: reference is_a: PO:0006001 ! phyllome relationship: part_of PO:0009060 ! calyx [Term] id: PO:0009032 name: petal def: "A member of the corolla, the inner whorl of non-fertile parts surrounding the fertile organs of a flower, usually soft and colored conspicuously." [APWeb:Glossary] subset: reference is_a: PO:0006001 ! phyllome relationship: part_of PO:0009059 ! corolla [Term] id: PO:0009033 name: tepal def: "A phyllome that is part of a perianth in which all parts are similar in appearance and are neither petals nor sepals." [POC:curators] subset: reference xref: PlantSystematics.org:tepal images xref: OBO_SF_PO:2972262 is_a: PO:0006001 ! phyllome relationship: part_of PO:0025021 ! collective tepal structure [Term] id: PO:0009034 name: floral bract def: "A bract subtending a flower." [Poc:curators] subset: reference synonym: "chaff" RELATED [] xref: OBO_SF_PO:2972266 is_a: PO:0009055 ! bract relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009035 name: nectary def: "A multicellular glandular structure secreting a liquid containing organic substances especially sugars." [GR:pj] subset: reference is_a: PO:0005656 ! portion of secretory tissue relationship: part_of PO:0009006 ! shoot system [Term] id: PO:0009036 name: lodicule def: "In a grass floret, one of two or three tiny scales or flaps of tissue outside the stamens, possibly representing reduced perianth segments." [APWeb:Glossary] subset: reference relationship: part_of PO:0006318 ! floret (sensu Poaceae) [Term] id: PO:0009037 name: lemma def: "In a grass floret, the lower of two bracts enclosing a flower." [APWeb:Glossary, GR:pj] subset: reference is_a: PO:0009034 ! floral bract relationship: part_of PO:0006318 ! floret (sensu Poaceae) [Term] id: PO:0009038 name: palea def: "In a grass floret, the upper of the two bracts enclosing a flower." [APWeb:Glossary, GR:pj] comment: Possibly a prophyll/bracteole. subset: reference is_a: PO:0009034 ! floral bract relationship: part_of PO:0006318 ! floret (sensu Poaceae) [Term] id: PO:0009039 name: glume alt_id: PO:0006026 def: "A \"bract\" in the inflorescence of a grass, sedge or similar plant." [APWeb:Glossary, GR:pj] subset: reference synonym: "rudimentary glume" RELATED [] is_a: PO:0009054 ! inflorescence bract relationship: part_of PO:0009051 ! spikelet [Term] id: PO:0009040 name: sterile lemma alt_id: PO:0006029 def: "A bract in the position of a lemma, but not enclosing floral organs." [UMSL:tk] comment: An undeveloped androecium or gynoecium may or may not be detectable. subset: reference synonym: "empty glume" RELATED [] is_a: PO:0009037 ! lemma [Term] id: PO:0009041 name: fertile lemma def: "A lemma that encloses a functional flower, with androecium, gynoecium or both." [UMSL:tk] subset: reference is_a: PO:0009037 ! lemma [Term] id: PO:0009042 name: prophyll def: "The first leaf or two leaves formed at the base of an axillary shoot, often smaller and/or in a distinctively different position from those formed subsequently." [APWeb:Glossary] subset: reference is_a: PO:0006001 ! phyllome [Term] id: PO:0009043 name: bracteole def: "A small leaf or leaves borne singly or in pairs on the pedicel, the prophyll(s) of the flower-shoot (pedicel plus flower)." [APWeb:Glossary] is_a: PO:0009042 ! prophyll relationship: part_of PO:0009052 ! pedicel [Term] id: PO:0009044 name: perigynium def: "Sac-like bract subtending the pistillate flower, as in Carex." [GR:pj] is_a: PO:0009042 ! prophyll [Term] id: PO:0009045 name: involucral bract def: "Equals inflorescence bract of an involucre, as in Asteraceae or Compositeae." [APWeb:Glossary] subset: reference synonym: "phyllary" RELATED [] is_a: PO:0009054 ! inflorescence bract relationship: part_of PO:0009100 ! involucre [Term] id: PO:0009046 name: flower alt_id: PO:0004541 def: "A determinate reproductive shoot system that has as part at least one carpel or at least one stamen and does not contain any other determinate shoot system as a part." [POC:curators] comment: The characteristic reproductive structure of angiosperms. May have as part one or more petals, sepals or tepals. May contain pistillode or staminode or other aborted organs that don't show up in mature form. subset: reference synonym: "diclinous flower" NARROW [] synonym: "double flower" NARROW [] synonym: "imperfect flower" NARROW [] synonym: "monoclinous flower" NARROW [] synonym: "perfect flower" NARROW [] synonym: "pistillate flower" NARROW [] synonym: "staminate flower" NARROW [] xref: OBO_SF_PO:2971891 is_a: PO:0025082 ! reproductive shoot system [Term] id: PO:0009047 name: stem def: "A shoot axis that is the primary axis of a plant." [POC:curators] comment: Often bears leaves and buds. It is usually above ground, more or less negatively geotropic, and exogenous in origin. subset: reference synonym: "cane" NARROW [] synonym: "culm" EXACT [] synonym: "primary axis" EXACT [] synonym: "stalk" NARROW [] synonym: "trunk" NARROW [] xref: OBO_SF_PO:2903994 xref: OBO_SF_PO:2982923 is_a: PO:0025029 ! shoot axis [Term] id: PO:0009049 name: inflorescence alt_id: PO:0009048 alt_id: PO:0009050 alt_id: PO:0020088 alt_id: PO:0020111 alt_id: PO:0020112 alt_id: PO:0020113 alt_id: PO:0020114 alt_id: PO:0020115 alt_id: PO:0020116 alt_id: PO:0020117 alt_id: PO:0020118 alt_id: PO:0020119 alt_id: PO:0020120 def: "That part of the axial system of plants above the uppermost foliage leaf/pair of foliage leaves that bears flowers." [APWeb:Glossary] comment: Some plants have only solitary flowers, e.g. Magnolia. subset: reference synonym: "capitulum" NARROW [] synonym: "catkin" NARROW [] synonym: "cob (sensu Sorghum)" NARROW [] synonym: "corymb" NARROW [] synonym: "cyme" NARROW [] synonym: "dichasium" NARROW [] synonym: "drepanium" NARROW [] synonym: "floret (sensu Asteraceae)" NARROW [] synonym: "helicoid cyme" NARROW [] synonym: "monochasium" NARROW [] synonym: "panicle" NARROW [] synonym: "raceme" NARROW [] synonym: "rhipidium" NARROW [] synonym: "scorpioid cyme" NARROW [] synonym: "spike (sensu Triticeae)" NARROW [] synonym: "umbel" NARROW [] synonym: "verticillaster" NARROW [] xref: OBO_SF_PO:2971891 is_a: PO:0025082 ! reproductive shoot system relationship: has_part PO:0009046 ! flower [Term] id: PO:0009051 name: spikelet def: "Ultimate and congested inflorescence branch of the grasses." [APWeb:Glossary] comment: It consists of one to many closely-packed flowers and associated glumes etc. subset: Poaceae subset: reference xref: OBO_SF_PO:2971891 is_a: PO:0025082 ! reproductive shoot system relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009052 name: pedicel def: "A branch that supports an individual flower in an inflorescence that contains more than one flower." [ISBN:0-7167-1007-2] comment: The bracteoles are borne on the pedicel, which terminates in a flower. subset: reference xref: OBO_SF_PO:2971884 xref: OBO_SF_PO:2975275 is_a: PO:0025073 ! branch relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009053 name: peduncle def: "A branch of an inflorescence or an individual flower." [ISBN:0-7167-1007-2] subset: reference synonym: "inflorescence stem " RELATED [] xref: OBO_SF_PO:2972231 is_a: PO:0025073 ! branch relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009054 name: inflorescence bract def: "A bract subtending a branch of the inflorescence or borne on the inflorescence axis below any branches or flowers." [APWeb:Glossary] subset: reference xref: OBO_SF_PO:2972266 is_a: PO:0009055 ! bract relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009055 name: bract def: "A leaf, usually different from foliage leaves, subtending a reproductive structure." [POC:curators] comment: Often used to refer to what is called here floral bract. subset: reference synonym: "hypsophyll" RELATED [] is_a: PO:0025034 ! leaf [Term] id: PO:0009056 name: floral nectary def: "A multicellular glandular structure found in the flower secreting a liquid containing organic substances especially sugars." [ISBN:047124529] subset: reference is_a: PO:0009035 ! nectary relationship: part_of PO:0009046 ! flower [Term] id: PO:0009057 name: extrafloral nectary def: "A multicellular glandular structure found in places other than flower secreting a liquid containing organic substances especially sugar." [ISBN:047124529] is_a: PO:0009035 ! nectary [Term] id: PO:0009058 name: perianth def: "A collective phyllome structure composed of two or more petals, sepals, or tepals." [POC:curators] subset: reference xref: OBO_SF_PO:2971891 xref: OBO_SF_PO:2988258 is_a: PO:0025023 ! collective phyllome structure relationship: part_of PO:0009046 ! flower [Term] id: PO:0009059 name: corolla def: "A collective phyllome structure composed of two or more petals." [POC:curators] subset: reference xref: OBO_SF_PO:2971891 xref: OBO_SF_PO:2988258 is_a: PO:0025023 ! collective phyllome structure relationship: part_of PO:0009058 ! perianth [Term] id: PO:0009060 name: calyx def: "A collective phyllome structure composed of two or more sepals." [POC:curators] subset: reference xref: OBO_SF_PO:2971891 xref: OBO_SF_PO:2988258 is_a: PO:0025023 ! collective phyllome structure relationship: part_of PO:0009058 ! perianth [Term] id: PO:0009061 name: androecium def: "A collective phyllome structure composed of two or more stamens." [POC:curators] comment: In some cases the androecium may consist of only one stamen. subset: reference xref: OBO_SF_PO:2971891 xref: OBO_SF_PO:2988258 is_a: PO:0025023 ! collective phyllome structure relationship: part_of PO:0009046 ! flower [Term] id: PO:0009062 name: gynoecium def: "A collective phyllome structure composed of two or more carpels." [POC:curators] comment: In some cases the gynoecium may consist of only one carpel. subset: reference synonym: "pistil" RELATED [] xref: OBO_SF_PO:2971891 xref: OBO_SF_PO:2988258 is_a: PO:0025023 ! collective phyllome structure relationship: part_of PO:0009046 ! flower [Term] id: PO:0009063 name: epicalyx def: "A collective phyllome structure composed of two or more phyllomes immediately outside the calyx." [POC:curators] subset: reference xref: OBO_SF_PO:2971891 xref: OBO_SF_PO:2988258 is_a: PO:0025023 ! collective phyllome structure relationship: part_of PO:0009046 ! flower [Term] id: PO:0009064 name: receptacle def: "A cardinal organ part that is the region at the distal end of either a peduncle or a pedicel where the floral appendages (for example, sepals, petals, stamens, and pistils) are attached." [web:http\://www.bbg.org/gar2/topics/botany/parts_flowers.html] subset: reference xref: OBO_SF_PO:2971884 xref: OBO_SF_PO:2975273 is_a: PO:0009049 ! inflorescence is_a: PO:0025001 ! cardinal organ part [Term] id: PO:0009065 name: hypanthium def: "A cup- or tube-shaped cardinal organ part, bearing perianth and stamens on its rim, so these arise above the base, and often above the top, of the ovary." [ISBN:0521251346] subset: reference xref: PATO:0001873 "tube-shaped (synonym of cylindrical)" xref: PATO:0002227 "cup-shaped" xref: OBO_SF_PO:2972200 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009064 ! receptacle [Term] id: PO:0009066 name: anther def: "The pollen-bearing part of a stamen." [APWeb:Glossary] subset: reference xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009029 ! stamen [Term] id: PO:0009067 name: filament def: "A stalk of a stamen." [GR:pj, MaizeGDB:lv] subset: reference is_a: PO:0025066 ! stalk relationship: part_of PO:0009029 ! stamen [Term] id: PO:0009068 name: connective def: "The part of the stamen that connects the microsporangia/pollen sacs." [APWeb:Glossary] subset: reference xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009066 ! anther [Term] id: PO:0009069 name: theca def: "A part of the anther consisting of paired sporangia that dehisce down a common slit." [APWeb:Glossary] subset: reference is_a: PO:0009070 ! microsporangium [Term] id: PO:0009070 name: microsporangium def: "A sporangium producing microspores, usually many in number." [APWeb:Glossary] subset: reference synonym: "anther lobe" RELATED [] synonym: "pollen sac" RELATED [] relationship: part_of PO:0009066 ! anther [Term] id: PO:0009071 name: tapetum def: "Innermost part of the anther wall, involved in the nutrition of the pollen." [APWeb:Glossary, TAIR:lr] subset: reference is_a: PO:0009007 ! portion of plant tissue relationship: develops_from PO:0006008 ! inner secondary parietal cell layer relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0009072 name: ovary def: "The basal portion of a carpel or group of fused carpels, that encloses the ovule(s)." [APWeb:Glossary, TAIR:lr] subset: Maize subset: reference xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009030 ! carpel [Term] id: PO:0009073 name: stigma def: "Part of a carpel or group of fused carpels on which the pollen germinates, usually apical." [APWeb:Glossary, TAIR:lr] subset: reference xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009030 ! carpel [Term] id: PO:0009074 name: style def: "An elongated part of a carpel or group of fused carpels between the ovary and the stigma, and through which the pollen tube grows." [APWeb:Glossary, TAIR:lr] subset: reference synonym: "silk" RELATED [] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009030 ! carpel [Term] id: PO:0009075 name: plant ontology def: "OBSOLETE. A controlled vocabulary to describe the various plant parts and the growth and developmental stages." [Poc:curators] is_obsolete: true [Term] id: PO:0009076 name: stylar ridge of lower floret of sessile spikelet of ear xref: OBO_SF_PO:2959654 relationship: part_of PO:0006423 ! gynoecium of lower floret of sessile spikelet of ear [Term] id: PO:0009077 name: staminode def: "Sterile stamen." [APWeb:Glossary, GR:pj] is_a: PO:0009028 ! microsporophyll relationship: part_of PO:0009061 ! androecium [Term] id: PO:0009078 name: pistillode def: "A sterile pistil, often rudimentary." [APWeb:Glossary] subset: reference is_a: PO:0009062 ! gynoecium [Term] id: PO:0009079 name: stylar ridge of upper floret of pedicellate spikelet of ear xref: OBO_SF_PO:2959654 relationship: part_of PO:0006426 ! gynoecium of upper floret of pedicellate spikelet of ear [Term] id: PO:0009080 name: spikelet rachilla def: "The axis of the spikelet, above the glumes." [Poc:curators] is_a: PO:0009081 ! inflorescence branch relationship: part_of PO:0009051 ! spikelet [Term] id: PO:0009081 name: inflorescence branch def: "Any branch forming from the primary or the higher order inflorescence axis." [Poc:curators] synonym: "coflorescence" RELATED [] is_a: PO:0025073 ! branch relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009082 name: floret def: "Small flowers, especially of the spikelets of Poaceae and Cyperaceae." [APWeb:Glossary] subset: reference is_a: PO:0009046 ! flower [Term] id: PO:0009083 name: reproductive structures def: "OBSOLETE. Aggregation of gamete producing structures." [Poc:curators] is_obsolete: true [Term] id: PO:0009084 name: pericarp def: "A wall of a fruit, developed from the ovary or carpel wall." [APWeb:Glossary, GR:pj, TAIR:lr] subset: Arabidopsis subset: Citrus subset: Maize subset: Poaceae subset: Rice subset: Tomato synonym: "fruit peel" RELATED [] synonym: "fruit rind" RELATED [] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009001 ! fruit [Term] id: PO:0009085 name: epicarp alt_id: PO:0006046 alt_id: PO:0006217 def: "A portion of plant tissue that is the outer layer of a pericarp." [GR:pj] subset: Citrus subset: Tomato synonym: "ectocarp" EXACT [] synonym: "exocarp" EXACT [] synonym: "flavedo" EXACT [] synonym: "outer epidermis of pericarp" RELATED [] synonym: "pericarp epidermis" RELATED [] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009084 ! pericarp [Term] id: PO:0009086 name: endocarp alt_id: PO:0006047 def: "A portion of plant tissue that is the innermost differentiated layer of a pericarp." [GR:pj] subset: Arabidopsis subset: Citrus subset: Maize subset: Poaceae subset: Rice subset: Tomato synonym: "endocarp" RELATED [] synonym: "flesh (sensu Citrus)" RELATED [] synonym: "inner epidermis of pericarp" RELATED [] synonym: "pulp (sensu Citrus)" RELATED [] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009084 ! pericarp [Term] id: PO:0009087 name: mesocarp def: "A portion of plant tissue that is the middle layer of a pericarp." [GR:pj] subset: Citrus subset: Tomato synonym: "albedo" RELATED [] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009084 ! pericarp [Term] id: PO:0009088 name: seed coat def: "A portion of plant tissue that is the covering of a seed derived from ovular - mainly integumentary - tissue." [APWeb:Glossary, GR:pj, TAIR:lr] comment: Used only when not specified more precisely; see testa, tegmen. is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009010 ! seed [Term] id: PO:0009089 name: endosperm def: "A maximal portion of nutritive plant tissue in a seed." [APWeb:Glossary, GR:pj] comment: In angiosperms endosperm is usually triploid and formed after fertilization by the fusion of one gamete with the polar nucleus; sometimes diploid or polyploid. is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009010 ! seed [Term] id: PO:0009090 name: aril def: "A structure associated with and often partly or wholly covering a seed and developed from the funicle or raphe." [APWeb:Glossary] comment: Also used more generally to refer to a similar structure derived from any part of the ovule - there has been much and sometimes acrimonious debate over the correct definition of the term, so when used the origin of the aril should generally be given for clarity. subset: reference relationship: develops_from PO:0020006 ! funicle relationship: part_of PO:0009010 ! seed [Term] id: PO:0009091 name: mature dispersal unit def: "OBSOLETE. provisional term" [Poc:curators] is_obsolete: true [Term] id: PO:0009092 name: stylar ridge of upper floret of sessile spikelet of ear xref: OBO_SF_PO:2959654 relationship: part_of PO:0006425 ! gynoecium of upper floret of sessile spikelet of ear [Term] id: PO:0009100 name: involucre def: "A collective phyllome structure composed of two or more bracts at the base of a cluster of flowers, as found in Asteraceae or Compositae." [POC:curators] comment: The burs or bristles in Cenchrus and Pennisetum are not involucres because the fused structures are branches and not bracts. xref: OBO_SF_PO:2971891 xref: OBO_SF_PO:2997165 is_a: PO:0025023 ! collective phyllome structure relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009101 name: long lateral tassel branch def: "The long branch that  arise from the central spike of tassel in maize." [GR:pj, MaizeGDB:lv] subset: Maize synonym: "second order tassel branch" RELATED [] is_a: PO:0006323 ! tassel branch relationship: develops_from PO:0009104 ! long lateral tassel branch meristem [Term] id: PO:0009102 name: short tassel branch def: "The very short branch that may arise from either or both the long lateral branch and the central spike of tassel in maize." [GR:pj, MaizeGDB:lv] subset: Maize synonym: "third order tassel branch" RELATED [] is_a: PO:0006323 ! tassel branch relationship: develops_from PO:0009103 ! short tassel branch meristem [Term] id: PO:0009103 name: short tassel branch meristem def: "The meristem present on either or both the long lateral branch and central spike of a maize tassel that gives rise to short tassel branch." [GR:pj, MaizeGDB:lv] subset: Maize synonym: "short branch meristem" RELATED [] synonym: "third order tassel branch meristem" RELATED [] is_a: PO:0009107 ! tassel lateral meristem relationship: part_of PO:0006324 ! central spike of tassel relationship: part_of PO:0009101 ! long lateral tassel branch [Term] id: PO:0009104 name: long lateral tassel branch meristem def: "The meristem that gives rise to the long lateral branch in the maize tassel." [MaizeGDB:lv] subset: Maize synonym: "long lateral branch meristem" RELATED [] synonym: "second order tassel branch meristem" RELATED [] is_a: PO:0009107 ! tassel lateral meristem relationship: part_of PO:0006324 ! central spike of tassel [Term] id: PO:0009105 name: inflorescence lateral meristem def: "The meristem which gives rise to the lateral structures of the inflorescence and contributes to their apical growth." [GR:pj, MaizeGDB:lv] is_a: PO:0000230 ! inflorescence meristem is_a: PO:0006344 ! shoot lateral meristem [Term] id: PO:0009106 name: tassel meristem def: "Meristem that gives rise to the apical and lateral structures of the tassel inflorescence in maize." [GR:pj] subset: Maize is_a: PO:0000230 ! inflorescence meristem relationship: part_of PO:0020126 ! tassel [Term] id: PO:0009107 name: tassel lateral meristem def: "The meristem that gives rise to the long lateral branch, short branch and spikelets in maize tassel." [MaizeGDB:lv] subset: Maize is_a: PO:0009105 ! inflorescence lateral meristem is_a: PO:0009106 ! tassel meristem [Term] id: PO:0009108 name: inflorescence apical meristem def: "A reproductive shoot apical meristem that gives rise to the apical growth of the inflorescence. It develops from the shoot apical meristem (SAM) after it undergoes transition from vegetative to reproductive phase." [GR:pj, MaizeGDB:lv] is_a: PO:0000230 ! inflorescence meristem is_a: PO:0008028 ! reproductive shoot apical meristem relationship: develops_from PO:0008016 ! vegetative shoot apical meristem [Term] id: PO:0009109 name: ear meristem def: "The meristem which gives rise to the female inflorescence or ear in maize." [MaizeGDB:lv] subset: Maize is_a: PO:0000230 ! inflorescence meristem relationship: part_of PO:0020136 ! ear (sensu Zea) [Term] id: PO:0009110 name: ear lateral meristem def: "The meristem that gives rise to the lateral structures of a maize ear." [GR:pj] subset: Maize is_a: PO:0009105 ! inflorescence lateral meristem is_a: PO:0009109 ! ear meristem [Term] id: PO:0009111 name: petiole pulvinus def: "Pulvinus of the petiole." [GR:cwt] is_a: PO:0009000 ! pulvinus relationship: part_of PO:0020038 ! petiole [Term] id: PO:0019018 name: embryo axis def: "Axial part of the young sporophyte comprising the hypocotyl, and the root meristem, or the radicle if one is present." [ISBN:0471245208] synonym: "hypocotyl-root axis" RELATED [] is_a: PO:0025004 ! plant axis relationship: part_of PO:0009009 ! embryo [Term] id: PO:0019022 name: arilloid def: "An outgrowth from parts of the seed other than from the funiculus or raphe." [ISBN:0080280293] relationship: part_of PO:0009010 ! seed [Term] id: PO:0019023 name: strophiole def: "An outgrowth occurring on the raphe." [ISBN:0080280293] subset: reference is_a: PO:0019022 ! arilloid relationship: part_of PO:0020027 ! raphe [Term] id: PO:0019024 name: seed operculum def: "A plug-like structure formed in the micropylar region of the seed coat." [ISBN:0080280293] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009010 ! seed [Term] id: PO:0019026 name: tracheid bar def: "A distinct ring-like structure, composed of tracheid cells, which surrounds the hilum of some taxa e.g., Phaseolus, and forms a groove in the surface of the pericarp (immediately adjacent to the hilum)." [ISBN:0080280293] is_a: PO:0009015 ! portion of vascular tissue relationship: part_of PO:0009010 ! seed [Term] id: PO:0020001 name: ovary placenta def: "A placenta that is part of an ovary and to which ovules are attached." [APWeb:Glossary] subset: reference is_a: PO:0025078 ! placenta relationship: part_of PO:0009072 ! ovary [Term] id: PO:0020002 name: endothecium def: "A portion of hypodermis of an anther sac with distinctively thickened walls and involved in its dehiscence, especially when this is by slits." [APWeb:Glossary] subset: reference synonym: "anther sac hypodermis" RELATED [] is_a: PO:0005051 ! hypodermis relationship: develops_from PO:0006009 ! outer secondary parietal cell layer relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0020003 name: ovule def: "A stalked or sessile structure in a seed plant within which one or more megaspores are formed and later the female gametophyte or embryo sac develops." [APWeb:Glossary] subset: reference xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009072 ! ovary [Term] id: PO:0020004 name: exothecium alt_id: PO:0006059 def: "The epidermis of an anther sac, sometimes with distinctively thickened walls and involved in its dehiscence, usually only when this is poricidal." [APWeb:Glossary] subset: reference synonym: "anther epidermis" RELATED [] synonym: "anther sac epidermis" RELATED [] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0020005 name: placentoid def: "An inpushing of the anther wall." [APWeb:Glossary] subset: reference relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0020006 name: funicle def: "A stalk that attaches the ovule to the placenta." [APWeb:Glossary, GR:pj] subset: reference synonym: "funiculus" RELATED [] is_a: PO:0025066 ! stalk relationship: part_of PO:0009072 ! ovary [Term] id: PO:0020008 name: exine def: "OBSOLETE: The outer layer of the pollen grain wall, highly resistant to strong acids and bases, and composed primarily of sporopollenin." [APWeb:Glossary] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043668. subset: reference is_obsolete: true [Term] id: PO:0020009 name: ectexine def: "OBSOLETE: The outer part of the exine, which stains positively with basic fuchsin in optical microscopy and has higher electron density in conventionally prepared TEM sections." [APWeb:Glossary] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043669. subset: reference is_obsolete: true [Term] id: PO:0020010 name: endexine def: "OBSOLETE: The inner part of the exine, which stains." [APWeb:Glossary] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043671. subset: reference is_obsolete: true [Term] id: PO:0020011 name: nexine def: "OBSOLETE: The inner, non-sculptured part of the exine which lies below the sexine." [APWeb:Glossary] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043672. subset: reference is_obsolete: true [Term] id: PO:0020012 name: sexine def: "OBSOLETE: The outer, sculptured layer of the exine, which lies above the nexine." [APWeb:Glossary] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043673. subset: reference is_obsolete: true [Term] id: PO:0020013 name: tectum def: "OBSOLETE: The layer of sexine, which forms a roof over the columellae, granules or other infratectal elements." [APWeb:Glossary] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043676, subset: reference synonym: "sexine 2" RELATED [] is_obsolete: true [Term] id: PO:0020014 name: columella def: "OBSOLETE: A rod-like element of the sexine/ectexine, either supporting the tectum or a caput." [APWeb:Glossary] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043674. subset: reference synonym: "sexine 1" RELATED [] is_obsolete: true [Term] id: PO:0020015 name: sculpture elements def: "OBSOLETE: Third layer of sexine." [APWeb:Glossary] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043675. subset: reference synonym: "sexine 3" RELATED [] is_obsolete: true [Term] id: PO:0020016 name: foot layer def: "OBSOLETE: The inner layer of the ectexine." [APWeb:Glossary] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043670. synonym: "nexine 1" RELATED [] is_obsolete: true [Term] id: PO:0020017 name: intine def: "OBSOLETE: The innermost of the major layers of the pollen grain wall, underlies the exine and borders the cytoplasm, not acetolysis resistant and is therefore absent in conventionally prepared palynological material." [APWeb:Glossary] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043678. subset: reference is_obsolete: true [Term] id: PO:0020018 name: germination pore def: "OBSOLETE: Area through which the pollen imports the nutrition during its development, at the time of pollen germination, the pollen tube emerges through it." [GR:pj] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043677. subset: reference synonym: "pollen pore" RELATED [] is_obsolete: true [Term] id: PO:0020019 name: megaspore def: "The larger, in general, of the two kinds of spores produced after meiosis in the life cycle of a heterosporous plant, and on germination giving rise to the female gametophyte (embryo sac)." [APWeb:Glossary] xref: CL:0000250 is_a: PO:0025017 ! spore relationship: develops_from PO:0000431 ! megasporocyte [Term] id: PO:0020020 name: nucellus def: "A portion of subepidermal tissue in the ovule surrounding the megasporocyte." [APWeb:Glossary] subset: reference synonym: "megasporangium" RELATED [] xref: OBO_SF_PO:2903966 is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0020003 ! ovule [Term] id: PO:0020021 name: integument def: "One of the layers of tissue that usually covers an ovule, enveloping a nucellus and forming the micropyle at the apex." [APWeb:Glossary] subset: reference is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0020003 ! ovule [Term] id: PO:0020022 name: inner integument def: "The innermost of the two layers of tissue that usually cover the ovule, contiguous to the nucellus and usually contributing to the formation of the micropyle at the apex." [APWeb:Glossary] is_a: PO:0020021 ! integument [Term] id: PO:0020023 name: outer integument def: "One of the two layers of tissue that usually cover the ovule, contiguous to the inner integument and usually involved in forming the micropyle at the apex." [APWeb:Glossary] is_a: PO:0020021 ! integument [Term] id: PO:0020024 name: endothelium def: "Cells of the inner epidermis of the inner (or only) integument of the ovule that are radially elongated and metabolically very active." [APWeb:Glossary] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0020022 ! inner integument [Term] id: PO:0020025 name: micropyle def: "A small canal or opening through the integument(s) at the apex of an ovule." [APWeb:Glossary] comment: In a mature seed the micropyle may remain visible as an occluded pore or may be obliterated. The micropyle originates as an opening in the integuments of an ovule through which the pollen tube usually enters the embryo sac. subset: reference relationship: part_of PO:0020003 ! ovule [Term] id: PO:0020026 name: chalaza def: "Region in the ovule where the integuments and the nucellus join with the funiculus." [ISBN:047124529] comment: The chalaza is recognized as the region which initiates the two integuments at its flank. subset: reference synonym: "ovular chlaza" EXACT [] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0020003 ! ovule [Term] id: PO:0020027 name: raphe def: "That part of the funicle that is adnate to the ovule." [APWeb:Glossary, ISBN:047124529] comment: See antiraphe. subset: reference xref: OBO_SF_PO:2971884 xref: OBO_SF_PO:2972097 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020006 ! funicle [Term] id: PO:0020028 name: antiraphe def: "The region on the other side of the ovule from the raphe." [APWeb:Glossary] comment: See raphe. subset: reference xref: OBO_SF_PO:2971884 xref: OBO_SF_PO:2972168 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020003 ! ovule [Term] id: PO:0020029 name: obturator def: "An outgrowth of the funicle, that forms a bridge between the micropyle and other tissues." [APWeb:Glossary] comment: Most commonly arising from the funicle, also developing from placenta, integument, etc. subset: reference is_a: PO:0009007 ! portion of plant tissue relationship: develops_from PO:0020006 ! funicle [Term] id: PO:0020030 name: cotyledon def: "A leaf formed at the first node of a sporophyte." [APWeb:Glossary, GR:pj] subset: reference is_a: PO:0009025 ! vascular leaf [Term] id: PO:0020031 name: radicle def: "The radicle is the basal continuation of the hypocotyl in an embryo and gives rise to the root system of the adult plant; sometimes more or less abortive." [APWeb:Glossary] subset: reference is_a: PO:0000045 ! embryonic root relationship: part_of PO:0019018 ! embryo axis [Term] id: PO:0020032 name: plumule def: "The somewhat differentiated terminal bud in several embryo types above the cotyledonary node, in which one or more internodes and leaves or scales can be discerned in a primordial stage." [APWeb:Glossary] synonym: "embryonic shoot" RELATED [] is_a: PO:0004713 ! terminal bud relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020033 name: coleoptile def: "A tubular structure developed at the junction of the cotyledonary sheath with the seedling axis, and surrounding the plumule of a monocot embryo or seedling." [APWeb:Glossary] is_a: PO:0009025 ! vascular leaf relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020034 name: coleorhiza def: "A portion of plant tissue surrounding the radicle in the embryo or seedling of some monocots." [APWeb:Glossary] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020035 name: epicotyl def: "The first internode of a stem above the hypocotyl. In literature also used for the entire embryonic axis, consisting of several internodes, above the cotyledonary node." [APWeb:Glossary] is_a: PO:0020142 ! stem internode relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020036 name: epiblast def: "A flap of tissue in an embryo or seedling arising opposite to the insertion of the cotyledon/scutellum." [APWeb:Glossary] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020037 name: mesocotyl def: "The internode between the cotyledon or cotyledons and the leaf or leaves at the next node of a young sporophyte." [APWeb:Glossary] is_a: PO:0020142 ! stem internode relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020038 name: petiole def: "A stalk of a leaf." [APWeb:Glossary, GR:pj] is_a: PO:0025066 ! stalk relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0020039 name: leaf lamina def: "The lamina of a leaf, usually dorsiventrally flattened and expanded." [APWeb:Glossary] comment: Reference lamina in CARO. synonym: "leaf blade" RELATED [] xref: OBO_SF_PO:2971884 is_a: PO:0025060 ! lamina relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0020040 name: leaf base def: "The bottom part of a leaf where it attaches to the stem." [APWeb:Glossary] synonym: "leaf sheath base" RELATED [] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0020041 name: stipule def: "One of (usually) a pair of appendages at the bases of leaves in many broad-leaved angiosperms." [APWeb:Glossary] comment: The term not used for monocot leaves. is_a: PO:0006001 ! phyllome relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0020042 name: simple leaf def: "A leaf in which the lamina is undivided." [Poc:curators] is_a: PO:0009025 ! vascular leaf [Term] id: PO:0020043 name: compound leaf def: "A leaf having two or more distinct leaflets that are evident as such from early in development." [APWeb:Glossary] is_a: PO:0009025 ! vascular leaf [Term] id: PO:0020044 name: hyperphyll def: "The unifacial terete apical portion of a monocot cotyledon, sometimes also visible on other leaves." [APWeb:Glossary] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020030 ! cotyledon [Term] id: PO:0020045 name: pinnate leaf def: "A once-compound leaf with leaflets borne along a rachis." [APWeb:Glossary] comment: The total number of leaflets may be even or odd, in which case the leaf is called even-pinnate or odd-pinnate respectively. is_a: PO:0020043 ! compound leaf [Term] id: PO:0020046 name: palmate leaf def: "A once-compound leaf divided into several leaflets which arise at the same point, there being no rachis." [APWeb:Glossary] is_a: PO:0020043 ! compound leaf [Term] id: PO:0020047 name: microsporocyte def: "A diploid (2n) cell that undergoes meiosis and produces four haploid (1n) microspores." [ISBN:0878934030] subset: reference synonym: "microspore mother cell" RELATED [] synonym: "PMC" RELATED [] synonym: "pollen mother cell" RELATED [] xref: CL:0000248 is_a: PO:0006204 ! sporocyte relationship: develops_from PO:0006088 ! primary sporogenous cell relationship: part_of PO:0009070 ! microsporangium [Term] id: PO:0020048 name: microspore def: "The smaller, in general, of the two kinds of spores produced after meiosis in the life cycle of a heterosporous plant, and on germination giving rise to the male gametophyte." [APWeb:Glossary] subset: reference xref: CL:0000252 is_a: PO:0025017 ! spore relationship: develops_from PO:0000032 ! tetrad of microspores [Term] id: PO:0020049 name: leaflet def: "One of the ultimate segments of a compound leaf." [APWeb:Glossary] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020043 ! compound leaf [Term] id: PO:0020050 name: petiolule def: "A stalk of a leaflet." [APWeb:Glossary] is_a: PO:0025066 ! stalk relationship: part_of PO:0020049 ! leaflet [Term] id: PO:0020051 name: stipel def: "Stipule-like appendage(s) at the base of a leaflet (in unifoliolate or simple leaves, found at the top of the petiole)." [APWeb:Glossary] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020049 ! leaflet [Term] id: PO:0020052 name: megaphyll def: "OBSOLETE. Literally a large leaf, a leaf of any size whose vascular supply leaves one or more gaps as it departs from the stem vascular tissue." [APWeb:Glossary] is_obsolete: true [Term] id: PO:0020053 name: microphyll def: "OBSOLETE. Literally a small leaf, a leaf of any size in which any vascular trace supplying it does not interrupt the central vascular cylinder when it departs, i.e. there are no leaf gaps." [APWeb:Glossary] is_obsolete: true [Term] id: PO:0020054 name: bud scale def: "A reduced leaf surrounding a dormant bud." [UMSL:tk] is_a: PO:0006003 ! scale leaf [Term] id: PO:0020055 name: leaf rachis def: "A stalk that is the main axis of a pinnate or more highly compound leaf, that bears leaflets or divisions of the axis." [APWeb:Glossary] xref: OBO_SF_PO:2971884 xref: OBO_SF_PO:2972235 is_a: PO:0025066 ! stalk relationship: part_of PO:0020043 ! compound leaf [Term] id: PO:0020056 name: tegmen def: "That part of the seed coat that develops from the inner integument." [APWeb:Glossary, ISBN:0080374913] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009088 ! seed coat [Term] id: PO:0020057 name: testa def: "That part of the seed coat that develops from the outer integument, or from the single integument when there is only one." [APWeb:Glossary, ISBN:0080374913] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009088 ! seed coat [Term] id: PO:0020058 name: perisperm alt_id: PO:0006335 def: "Diploid nutritive tissue in an angiosperm seed derived from nucellar tissue." [APWeb:Glossary] synonym: "seed nucellus" RELATED [] is_a: PO:0009007 ! portion of plant tissue relationship: part_of PO:0009010 ! seed [Term] id: PO:0020059 name: pollen wall def: "OBSOLETE: Complex wall surrounding the micrsopore." [UMSL:fz] comment: This term is now available in the cellular_component aspect of the Gene Ontology, GO:0043667. subset: reference is_obsolete: true [Term] id: PO:0020060 name: caruncle def: "An outgrowth from the surface of a seed, usually near the hilum or micropyle." [APWeb:Glossary] is_a: PO:0019022 ! arilloid [Term] id: PO:0020061 name: coma def: "A tuft of hairs at one end of a seed." [APWeb:Glossary] synonym: "brush" RELATED [] relationship: part_of PO:0009010 ! seed [Term] id: PO:0020062 name: elaiosome def: "An appendage of a seed, usually rich in oil, attractive to animals, especially ants." [APWeb:Glossary] is_a: PO:0019022 ! arilloid [Term] id: PO:0020063 name: hilum def: "The scar on a seed at the place where it was attached to its funicle." [APWeb:Glossary] relationship: part_of PO:0009010 ! seed [Term] id: PO:0020064 name: dehiscent fruit def: "OBSOLETE. Fruit that breaks open at maturity to release the contents." [APWeb:Glossary] is_obsolete: true [Term] id: PO:0020065 name: indehiscent fruit def: "OBSOLETE. Fruit that does not open at maturity." [APWeb:Glossary] is_obsolete: true [Term] id: PO:0020066 name: fleshy fruit def: "OBSOLETE. The fruit may be derived from monocarpellate or multicarpellate gynoecia. Their walls may consist of the pericarp or of pericarp fused with extracarpellary tissue. The outer part of the fruit wall or the entire fruit wall may become fleshy by differentiating into soft, succulent parenchyma. Parts other than the wall such as placentae and partitions in multilocular ovaries may become fleshy." [ISBN:047124529] is_obsolete: true [Term] id: PO:0020075 name: mericarp def: "OBSOLETE. One segment of a fruit of a schizocarp consisting of pericarp plus seed(s)." [APWeb:Glossary] is_obsolete: true [Term] id: PO:0020081 name: seed as dispersal unit def: "OBSOLETE." [Poc:curators] is_obsolete: true [Term] id: PO:0020084 name: pyrene def: "OBSOLETE. The 'stone' or 'pit' (endocarp plus seed) of a succulent fruit." [APWeb:Glossary] is_obsolete: true [Term] id: PO:0020085 name: seed and fruit wall as dispersal unit def: "OBSOLETE." [Poc:curators] is_obsolete: true [Term] id: PO:0020086 name: multiple fruit def: "OBSOLETE. Fruit on a common axis derived from the ovaries of several flowers." [APWeb:Glossary] is_obsolete: true [Term] id: PO:0020090 name: central cell def: "The largest cell of the mature embryo sac. Contains two polar nuclei, which (after double fertilization) will develop into the endosperm." [TAIR:ki] subset: reference xref: CL:0000278 is_a: PO:0025026 ! megagametophytic cell relationship: part_of PO:0025074 ! embryo sac [Term] id: PO:0020091 name: male gametophyte alt_id: PO:0020007 def: "A gametophyte that produces male gametes." [APWeb:Glossary] subset: reference synonym: "microgametophyte" RELATED [] synonym: "pollen" RELATED [] synonym: "pollen grain" RELATED [] is_a: PO:0000003 ! whole plant [Term] id: PO:0020092 name: female gametophyte def: "A gametophyte that produces eggs." [APWeb:Glossary] subset: reference synonym: "embryo sac" RELATED [] synonym: "megagametophyte" RELATED [] is_a: PO:0000003 ! whole plant [Term] id: PO:0020093 name: antipodal cell def: "Cell, commonly three in number as in the eight-nucleate embryo sac, located at the other end of the embryo sac from the female gamete." [APWeb:Glossary] comment: More or less persistent, multiplicative or not. subset: reference xref: CL:0000537 is_a: PO:0025026 ! megagametophytic cell relationship: part_of PO:0025074 ! embryo sac [Term] id: PO:0020094 name: egg cell def: "A gamete produced by an archegonium or an embryo sac." [POC:curators] subset: reference synonym: "megagamete" EXACT [] xref: CL:0000254 is_a: PO:0025006 ! gamete [Term] id: PO:0020095 name: polar nucleus def: "OBSOLETE: Usually two nuclei in the center of the eight-nucleate embryo sac that fuse, and subsequently fuse with one of the male gametes to produce the endosperm." [APWeb:Glossary] comment: Comment: this term is now available in the cellular_component aspect of the Gene Ontology (GO:0043078). is_obsolete: true [Term] id: PO:0020096 name: egg apparatus def: "The egg cell and two synergids located at the micropylar end of the embryo sac." [TAIR:lr] subset: reference relationship: part_of PO:0025074 ! embryo sac [Term] id: PO:0020097 name: generative cell def: "A cell of the male gametophyte of angiosperms that divides to produce two male gametes or sperm cells." [APWeb:Glossary] subset: reference xref: CL:0000280 is_a: PO:0025027 ! microgametophytic cell [Term] id: PO:0020099 name: vegetative cell def: "The larger cell of the male gametophyte of angiosperms that does not divide further." [APWeb:Glossary] subset: reference xref: CL:0000296 is_a: PO:0025027 ! microgametophytic cell [Term] id: PO:0020100 name: hypocotyl def: "The part of the stem below the cotyledonary node and transitional to a root, found in a young sporophyte." [APWeb:Glossary] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0019018 ! embryo axis [Term] id: PO:0020101 name: stomium def: "A fissure or pore in the anther lobe through which the pollen is released." [GR:pj] subset: reference relationship: part_of PO:0000002 ! anther wall relationship: part_of PO:0005011 ! anther dehiscence zone [Term] id: PO:0020102 name: portion of transmitting tissue def: "A portion of ground tissue in the style of a carpel through which the pollen tube grows; it connects the stigma and the inside of ovary." [GR:pj, ISBN:0080374913] subset: reference synonym: "transmitting tract" RELATED [] is_a: PO:0025059 ! portion of ground tissue relationship: part_of PO:0009074 ! style [Term] id: PO:0020103 name: flag leaf def: "The last mature leaf before the inflorescence in a cereal crop plant." [GR:pj] is_a: PO:0006340 ! adult leaf [Term] id: PO:0020104 name: leaf sheath def: "Any tubular portion of the leaf surrounding the stem, as in the Poaceae." [GR:pj] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0020105 name: ligule def: "A membranous or hairy appendage on the adaxial/upper surface of a leaf, at the junction between sheath and blade, especially in grasses." [APWeb:Glossary] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0020106 name: auricle def: "Outgrowth at the base of a leaf blade that may wrap around the stem." [GR:pj] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0020108 name: suspensor def: "A nearly always single file of cells at the base of the embryo derived from the basal cell." [GR:pj] comment: It anchors the embryo in the embryo sac and pushes it into the endosperm. relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020109 name: hypophysis def: "The uppermost cell of the suspensor from which part of the root and root cap in the embryo of angiosperms are derived." [ISBN:047124529] is_a: PO:0025028 ! embryonic cell relationship: part_of PO:0020108 ! suspensor [Term] id: PO:0020110 name: scutellum def: "A more or less shield-shaped and absorptive portion of an embryo of grasses, probably a modified cotyledon." [APWeb:Glossary] synonym: "haustorial cotyledon" RELATED [] relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020121 name: lateral root def: "Root developing from the pericycle layer of the primary root." [ISBN:0122151704] is_a: PO:0009005 ! root [Term] id: PO:0020122 name: inflorescence axis def: "The central supporting structure around which flowers are born." [UMSL:fz] comment: Cob (sensu Zea) is different from the cob inflorescence found in Sorghum. synonym: "first order inflorescence branch" RELATED [] synonym: "inflorescence rachis" RELATED [] is_a: PO:0025029 ! shoot axis relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0020123 name: root cap def: "A group of cells that covers the apical meristem of the root." [APWeb:Glossary] subset: reference relationship: part_of PO:0009005 ! root [Term] id: PO:0020124 name: root stele alt_id: PO:0003012 def: "The central column of primary vascular tissue in the root and any tissue that it surrounds." [APWeb:Glossary] comment: Includes the pericycle as the outermost layer of the stele. subset: reference synonym: "root vascular cylinder" RELATED [] relationship: part_of PO:0009005 ! root [Term] id: PO:0020125 name: elongation zone def: "The portion of the root that includes small, densely cytoplasmic cells that are dividing and expanding in size." [GR:pj] subset: reference synonym: "region of cell elongation" RELATED [] synonym: "region of radial enlargement" RELATED [] relationship: part_of PO:0009005 ! root [Term] id: PO:0020126 name: tassel def: "The functionally-staminate flowering structure that terminates the stem of a Zea mays plant." [MaizeGDB:lv] comment: Branched inflorescence with a central axis and about 10-50 lateral branches. subset: Maize subset: reference is_a: PO:0009049 ! inflorescence [Term] id: PO:0020127 name: primary root alt_id: PO:0020089 def: "A root that develops directly from a embryonic radicle." [ISBN:0122151704, POC:curators] comment: Often the central axis of a root system. synonym: "tap root" EXACT [] is_a: PO:0009005 ! root relationship: develops_from PO:0020031 ! radicle [Term] id: PO:0020128 name: leaf margin def: "The margin of any flattened part of a leaf." [POC:curators] xref: OBO_SF_PO:2972280 is_a: PO:0025018 ! phyllome margin relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0020130 name: central root cap def: "The central part of a root cap in which the cells are arranged in longitudinal files." [GR:pj] synonym: "columella cells" RELATED [] relationship: part_of PO:0020123 ! root cap [Term] id: PO:0020131 name: lateral root cap def: "The part of the root cap that is parallel to the sides of the axis." [ISBN:0122151704] synonym: "peripheral cells" RELATED [] relationship: part_of PO:0020123 ! root cap [Term] id: PO:0020132 name: columella root cap cell def: "Cell that constitutes the central part of the root cap, arranged in longitudinal files." [PMID:9384380, TAIR:ki] is_a: PO:0025030 ! ground tissue cell relationship: develops_from PO:0020133 ! columella root cap initial cell [Term] id: PO:0020133 name: columella root cap initial cell def: "Cell that produces columella cells in the root cap. In direct contact with quiescent center." [ISBN:0471245208, TAIR:ki] synonym: "columella root cap stem cell" RELATED [] synonym: "columella stem cell" RELATED [] is_a: PO:0000059 ! root initial cell [Term] id: PO:0020134 name: statolith def: "OBSOLETE. Solid cell inclusion of starch containing plastids occurring in root cap cells." [GR:pj] comment: This is sub-cellular term is_obsolete: true [Term] id: PO:0020135 name: differentiation zone alt_id: PO:0003002 def: "The portion of the root located behind the elongation zone containing cells that are differentiating into their final form and function." [GR:pj] subset: reference synonym: "maturation zone" RELATED [] synonym: "specialization zone" RELATED [] relationship: part_of PO:0009005 ! root [Term] id: PO:0020136 name: ear (sensu Zea) def: "The distal part of a lateral (axillary) branch in Zea that bears the functionally-carpellate florets in a highly contracted inflorescence." [MaizeGDB:lv] subset: Maize subset: reference synonym: "cob" RELATED [] is_a: PO:0009049 ! inflorescence [Term] id: PO:0020137 name: leaf apex def: "The top part of the leaf, usually the apex of the leaf blade." [UMSL:fz] synonym: "leaf tip" RELATED [] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part relationship: part_of PO:0020039 ! leaf lamina [Term] id: PO:0020138 name: leaf vein def: "A strand of vascular tissue in the leaf blade." [APWeb:Glossary] is_a: PO:0009015 ! portion of vascular tissue relationship: part_of PO:0009025 ! vascular leaf [Term] id: PO:0020139 name: midvein def: "The central, and usually the most prominent, vein of a leaf or leaf-like organ." [APWeb:Glossary] synonym: "mid rib" RELATED [] is_a: PO:0020138 ! leaf vein [Term] id: PO:0020140 name: secondary vein def: "Second order veins in the leaf blade." [GR:pj] synonym: "veinlet" RELATED [] is_a: PO:0020138 ! leaf vein [Term] id: PO:0020141 name: stem node def: "A shoot node that is part of a stem." [APWeb:Glossary] is_a: PO:0005004 ! shoot node relationship: part_of PO:0009047 ! stem [Term] id: PO:0020142 name: stem internode def: "A shoot internode that is part of a stem." [POC:curators] comment: See node. is_a: PO:0005005 ! shoot internode relationship: part_of PO:0009047 ! stem [Term] id: PO:0020144 name: apical meristem def: "A maximal portion of meristem tissue located at an apex of a shoot system or root system." [GR:pj, POC:curators] synonym: "primary meristem" RELATED [] is_a: PO:0009013 ! meristem [Term] id: PO:0020145 name: lateral meristem def: "A meristem containing cells along the stem or root that first differentiate and function as members of a mature tissue system but then again take up meristematic activity." [APWeb:Glossary] synonym: "secondary meristem" RELATED [] is_a: PO:0009013 ! meristem [Term] id: PO:0020147 name: root apical meristem def: "An apical meristem of the root system." [GR:pj, UMSL:fz] comment: In most cases it is involved in root elongation. synonym: "promeristem" RELATED [] is_a: PO:0006085 ! root meristem is_a: PO:0020144 ! apical meristem [Term] id: PO:0020148 name: shoot apical meristem def: "A shoot meristem formed in the apex of the shoot, including meristems originating as axillary shoot meristems." [UMSL:fz] synonym: "apical meristem" RELATED [] synonym: "primary shoot meristem" RELATED [] is_a: PO:0006079 ! shoot meristem is_a: PO:0020144 ! apical meristem relationship: part_of PO:0000037 ! shoot apex [Term] id: PO:0020149 name: quiescent center def: "Hemispherically shaped aggregation of mitotically and metabolically inactive cells positioned behind the root cap." [ISBN:0122151704] relationship: part_of PO:0006085 ! root meristem [Term] id: PO:0025001 name: cardinal organ part def: "A plant structure that is a proper part of an organ and includes portions of tissues of at least two different types." [POC:curators] comment: Cardinal refers to the fact that these are biologically meaningful parts, not arbitrary. Examples include lobe (PO TBD), operculum (PO TBD), neck (PO TBD), petiole PO:0020038, leaflet PO:0020049. subset: Arabidopsis xref: OBO_SF_PO:2903994 xref: OBO_SF_PO:2945268 is_a: PO:0009011 ! plant structure relationship: part_of PO:0009008 ! plant organ created_by: Ramona creation_date: 2010-02-11T01:18:24Z [Term] id: PO:0025002 name: basal root def: "A root that arises from a part of the hypocotyl." [POC:curators] synonym: "adventitious root" BROAD [] is_a: PO:0009005 ! root created_by: Ramona creation_date: 2010-09-16T03:03:49Z [Term] id: PO:0025003 name: tuber axillary shoot def: "An axillary shoot that develops from a tuber axillary bud." [POC:curators] is_a: PO:0006343 ! axillary shoot created_by: Ramona creation_date: 2010-09-16T03:17:06Z [Term] id: PO:0025004 name: plant axis def: "An axial plant organ." [POC:curators] comment: Includes roots and shoots. is_a: PO:0009008 ! plant organ created_by: Ramona creation_date: 2010-07-01T03:44:41Z [Term] id: PO:0025005 name: organ margin def: "The edge of an organ and the area immediately internally adjacent to it." [POC:curators "Ithaca meeting, 12/2009"] comment: Only flattened or laminar organs or organ parts will have a margin. xref: OBO_SF_PO:2903994 xref: OBO_SF_PO:2971884 xref: OBO_SF_PO:2971897 is_a: PO:0025001 ! cardinal organ part created_by: rwalls creation_date: 2010-03-12T10:33:57Z [Term] id: PO:0025006 name: gamete def: "A plant cell that has half the chromosome complement of the sporophyte and is capable of fertilization to create a zygote." [POC:curators] xref: OBO_SF_PO:2941267 is_a: PO:0009002 ! plant cell created_by: cooperl creation_date: 2010-03-03T03:06:46Z [Term] id: PO:0025007 name: collective plant structure def: "A plant structure that is a proper part of a plant and is composed of two or more organs and any associated portions of plant tissue." [POC:curators] comment: Organs can be of the same type or different types. Examples include: flower PO:0009046, perianth PO:0009058, inflorescence PO:0009049. xref: OBO_SF_PO:2954382 is_a: PO:0009011 ! plant structure relationship: part_of PO:0000003 ! whole plant created_by: Ramona creation_date: 2010-02-09T04:12:11Z [Term] id: PO:0025008 name: petal margin def: "The margin of a petal." [POC:curators] is_a: PO:0025018 ! phyllome margin relationship: part_of PO:0009032 ! petal created_by: rwalls creation_date: 2010-03-12T10:49:36Z [Term] id: PO:0025009 name: leaf lamina margin def: "The margin of a leaf lamina." [POC:curators] is_a: PO:0020128 ! leaf margin relationship: part_of PO:0020039 ! leaf lamina created_by: Ramona creation_date: 2010-03-25T10:04:37Z [Term] id: PO:0025010 name: petiole margin def: "The margin of a flattened petiole." [POC:curators] is_a: PO:0020128 ! leaf margin relationship: part_of PO:0020038 ! petiole created_by: Ramona creation_date: 2010-03-25T10:04:37Z [Term] id: PO:0025011 name: bract margin def: "The margin of a bract." [POC:curators] is_a: PO:0025018 ! phyllome margin relationship: part_of PO:0009055 ! bract created_by: Ramona creation_date: 2010-03-25T10:15:35Z [Term] id: PO:0025012 name: cotyledon margin def: "The margin of a cotyledon." [POC:curators] is_a: PO:0025018 ! phyllome margin relationship: part_of PO:0020030 ! cotyledon created_by: Ramona creation_date: 2010-03-25T10:15:35Z [Term] id: PO:0025013 name: prophyll margin def: "The margin of a prophyll." [POC:curators] is_a: PO:0025018 ! phyllome margin relationship: part_of PO:0009042 ! prophyll created_by: Ramona creation_date: 2010-03-25T10:15:35Z [Term] id: PO:0025014 name: scale leaf margin def: "The margin of a scale leaf." [POC:curators] is_a: PO:0025018 ! phyllome margin relationship: part_of PO:0006003 ! scale leaf created_by: Ramona creation_date: 2010-03-25T10:15:35Z [Term] id: PO:0025015 name: tepal margin def: "The margin of a tepal." [POC:curators] is_a: PO:0025018 ! phyllome margin relationship: part_of PO:0009033 ! tepal created_by: Ramona creation_date: 2010-03-25T10:15:35Z [Term] id: PO:0025016 name: sporophyll margin def: "The margin of a sporophyll." [POC:curators] is_a: PO:0025018 ! phyllome margin relationship: part_of PO:0009026 ! sporophyll created_by: Ramona creation_date: 2010-03-25T10:15:35Z [Term] id: PO:0025017 name: spore def: "A plant cell that arises through meiosis and develops into a gametophyte." [POC:curators] xref: OBO_SF_PO:2972117 is_a: PO:0009002 ! plant cell created_by: Ramona creation_date: 2010-04-02T09:53:48Z [Term] id: PO:0025018 name: phyllome margin def: "The margin of a phyllome." [POC:curators] xref: OBO_SF_PO:2971884 is_a: PO:0025005 ! organ margin created_by: Ramona creation_date: 2010-04-02T10:51:16Z [Term] id: PO:0025019 name: carpel margin def: "The margin of a carpel." [POC:curators] comment: Only flattened carpels can have a margin. is_a: PO:0025016 ! sporophyll margin relationship: part_of PO:0009030 ! carpel created_by: Ramona creation_date: 2010-04-02T01:26:01Z [Term] id: PO:0025020 name: stamen margin def: "The margin of a stamen." [POC:curators] comment: Only flattened stamens can have a margin. is_a: PO:0025016 ! sporophyll margin relationship: part_of PO:0009029 ! stamen created_by: Ramona creation_date: 2010-04-02T01:27:23Z [Term] id: PO:0025021 name: collective tepal structure def: "A perianth consisting of two or more tepals." [POC:Curators] xref: OBO_SF_PO:2988258 is_a: PO:0009058 ! perianth created_by: cooperl creation_date: 2010-04-14T12:41:50Z [Term] id: PO:0025022 name: collective leaf structure def: "A collective phyllome structure composed of two or more leaves." [POC:curators] comment: This term replaces the obsolete term leaf whorl (PO:0008034). If you are looking for annotations for PO:0008034, please use this term instead. synonym: "leaf whorl" NARROW [] synonym: "rosette" NARROW [] xref: OBO_SF_PO:2988258 is_a: PO:0025023 ! collective phyllome structure created_by: Ramona creation_date: 2010-04-21T12:29:35Z [Term] id: PO:0025023 name: collective phyllome structure alt_id: PO:0008033 def: "A collective plant structure that consists of two or more phyllomes originating from the same node or from one or more adjacent nodes with compressed internodes." [POC:Curators] synonym: "floral whorl" NARROW [GO:0048438 "floral whorl development", GO:0048457 "floral whorl morphogenisis", GO:0048458 "floral whorl formation", GO:0048459 "floral whorl structural organization"] synonym: "phyllome whorl" RELATED [] synonym: "whorl" NARROW [] xref: OBO_SF_PO:2980171 xref: OBO_SF_PO:2993809 is_a: PO:0025007 ! collective plant structure created_by: cooperl creation_date: 2010-04-28T11:04:34Z [Term] id: PO:0025024 name: branch node def: "A shoot node that is part of a branch." [POC:curators] is_a: PO:0005004 ! shoot node relationship: part_of PO:0025073 ! branch created_by: Ramona creation_date: 2010-07-16T09:59:08Z [Term] id: PO:0025025 name: root system def: "A collective plant structure that produces root apical meristems and the plant structures that arise from them." [POC:curators] comment: Generally the below ground portion of a vascular plant. is_a: PO:0025007 ! collective plant structure disjoint_from: PO:0009006 ! shoot system created_by: Ramona creation_date: 2010-07-01T02:11:26Z [Term] id: PO:0025026 name: megagametophytic cell def: "A plant cell that is part of a female gametophyte." [POC:rw] is_a: PO:0009002 ! plant cell relationship: part_of PO:0020092 ! female gametophyte created_by: Ramona creation_date: 2010-05-07T02:36:24Z [Term] id: PO:0025027 name: microgametophytic cell def: "A plant cell that is part of a male gametophyte." [POC:rw] is_a: PO:0009002 ! plant cell relationship: part_of PO:0020091 ! male gametophyte created_by: Ramona creation_date: 2010-05-07T02:36:55Z [Term] id: PO:0025028 name: embryonic cell is_a: PO:0009002 ! plant cell created_by: Ramona creation_date: 2010-05-07T02:41:17Z [Term] id: PO:0025029 name: shoot axis def: "A plant axis that is part of a shoot system." [POC:curators] comment: Often bears leaves and branches. In vascular plants, has at least one node and one internode. synonym: "shoot" RELATED [] is_a: PO:0025004 ! plant axis relationship: part_of PO:0009006 ! shoot system created_by: Ramona creation_date: 2010-07-01T03:46:35Z [Term] id: PO:0025030 name: ground tissue cell is_a: PO:0009002 ! plant cell created_by: Ramona creation_date: 2010-05-07T02:47:45Z [Term] id: PO:0025031 name: laticifer cell def: "A ground tissue cell that contains latex." [POC:curators] is_a: PO:0025030 ! ground tissue cell created_by: Ramona creation_date: 2010-07-12T09:08:10Z [Term] id: PO:0025032 name: hydroid def: "An elongate, water conducting cell that is dead at maturity, with tapered ends that are thin and partially hydrolyzed, that lacks specialized wall thickenings or lignin." [ISBN:0-9620733-4-2, ISBN:13- 978-0-7178-1007-3] comment: Occurs in the gametophytic phase of a plant life cycle. is_a: PO:0000081 ! axial cell created_by: Ramona creation_date: 2010-05-12T04:46:21Z [Term] id: PO:0025033 name: leptoid def: "A food conducting cell associated with hydroids that resembles the sieve elements of some seedless vascular plants." [ISDN: 0-9620733-4-2, ISDN:13\: 978-0-7178-1007-3] comment: Occurs in the gametophytic phase of a plant life cycle. is_a: PO:0000081 ! axial cell created_by: Ramona creation_date: 2010-05-12T04:49:59Z [Term] id: PO:0025034 name: leaf def: "A phyllome that is not part of a flower." [POC:curators] is_a: PO:0006001 ! phyllome created_by: Ramona creation_date: 2010-07-12T01:31:44Z [Term] id: PO:0025035 name: storage parenchyma def: "A portion of parenchyma specialized for carbohydrate storage." [POC:curators] comment: This tissue could be found in any organ, but often occurs in fruits or tubers. New GO term carbohydrate storage has been requested. synonym: "flesh" EXACT [] synonym: "fleshy tissue" EXACT [] xref: CHEBI:23008 "carbohydrate" is_a: PO:0005421 ! parenchyma created_by: Ramona creation_date: 2010-05-25T04:30:20Z [Term] id: PO:0025036 name: tuber storage parenchyma def: "A portion of storage parenchyma that is part of a tuber." [POC:curators] comment: This is the flesh of a tuber. See part_of children for individual components of tuber flesh. synonym: "tuber flesh" EXACT [] xref: OBO_SF_PO:3005637 is_a: PO:0025035 ! storage parenchyma relationship: part_of PO:0004543 ! tuber created_by: Ramona creation_date: 2010-05-25T04:33:26Z [Term] id: PO:0025037 name: fruit storage parenchyma def: "A portion of storage parenchyma that is part of a fruit." [POC:curators] synonym: "fruit flesh" EXACT [] is_a: PO:0025035 ! storage parenchyma relationship: part_of PO:0009001 ! fruit created_by: Ramona creation_date: 2010-05-25T04:33:26Z [Term] id: PO:0025038 name: subterranean tuber storage parenchyma def: "A portion of tuber storage parenchyma that is part of a subterranean tuber." [POC:curators] comment: This term is used to refer to potato tuber flesh. See part_of children for individual components of subterranean tuber flesh. subset: Potato synonym: "potato tuber flesh" NARROW [] xref: OBO_SF_PO:3005637 is_a: PO:0025036 ! tuber storage parenchyma relationship: part_of PO:0004547 ! subterranean tuber created_by: Ramona creation_date: 2010-05-25T04:38:30Z [Term] id: PO:0025039 name: aerial tuber storage parenchyma def: "A portion of tuber storage parenchyma that is part of an aerial tuber." [POC:curators] comment: See part_of children for individual components of aerial tuber flesh. xref: OBO_SF_PO:3005637 is_a: PO:0025036 ! tuber storage parenchyma relationship: part_of PO:0004548 ! aerial tuber created_by: Ramona creation_date: 2010-05-25T04:38:30Z [Term] id: PO:0025040 name: tuber axillary vegetative bud def: "An axillary vegetative bud that is part of a tuber." [POC:curators] synonym: "tuber bud" EXACT [] synonym: "tuber eye" RELATED [] xref: OBO_SF_PO:3005636 is_a: PO:0004712 ! axillary vegetative bud relationship: part_of PO:0004543 ! tuber created_by: Ramona creation_date: 2010-05-26T08:09:37Z [Term] id: PO:0025041 name: aerial tuber axillary vegetative bud def: "A tuber axillary vegetative bud that is part of an aerial tuber." [POC:curators] xref: OBO_SF_PO:3005636 is_a: PO:0025040 ! tuber axillary vegetative bud relationship: part_of PO:0004548 ! aerial tuber created_by: Ramona creation_date: 2010-05-26T08:18:09Z [Term] id: PO:0025042 name: subterranean tuber axillary vegetative bud def: "A tuber axillary vegetative bud that is part of a subterranean tuber." [POC:curators] comment: A structure on the tuber surface that can sprout. In potatoes, axillary vegetative buds (eyes) can determine processing quality. Scale that the breeders use to rate the buds/sprouts of tubers: 1. none, 2. swollen eye, 3. sprout ca. 1/4", 4. sprout ca. 1/2", 5. sprout ca. 1", 6. sprout ca. 2", 7. sprout ca. 3", 8. new top growth, 9. chain tubers. subset: Potato synonym: "eye" BROAD [] synonym: "potato eye" NARROW [] synonym: "swollen eye" NARROW [] synonym: "tuber eye" BROAD [] xref: OBO_SF_PO:3005636 is_a: PO:0025040 ! tuber axillary vegetative bud relationship: part_of PO:0004547 ! subterranean tuber created_by: Ramona creation_date: 2010-05-26T08:18:09Z [Term] id: PO:0025043 name: tuber periderm def: "A portion of shoot periderm that is part of a tuber." [POC:curators] xref: OBO_SF_PO:3005635 is_a: PO:0005048 ! shoot axis periderm relationship: part_of PO:0004543 ! tuber created_by: Ramona creation_date: 2010-05-26T03:58:54Z [Term] id: PO:0025044 name: aerial tuber periderm def: "A portion of tuber periderm that is part of an aerial tuber." [POC:curators] is_a: PO:0025043 ! tuber periderm created_by: Ramona creation_date: 2010-05-27T09:31:12Z [Term] id: PO:0025045 name: subterranean tuber periderm def: "A portion of tuber periderm that is part of a subterranean tuber." [POC:curators] comment: The skin of young potatoes is epidermis while the skin of mature potatoes is periderm. subset: Potato synonym: "mature potato tuber skin" NARROW [ISSN:0022-0957] is_a: PO:0025043 ! tuber periderm relationship: part_of PO:0004547 ! subterranean tuber created_by: Ramona creation_date: 2010-05-27T09:31:12Z [Term] id: PO:0025046 name: tuber epidermis def: "A portion of shoot axis epidermis that is part of a tuber." [POC:curators] xref: OBO_SF_PO:3005635 is_a: PO:0000112 ! shoot axis epidermis relationship: part_of PO:0004543 ! tuber created_by: Ramona creation_date: 2010-05-27T09:37:30Z [Term] id: PO:0025047 name: aerial tuber epidermis def: "A portion of tuber epidermis that is part of an aerial tuber." [POC:curators] is_a: PO:0025046 ! tuber epidermis relationship: part_of PO:0004548 ! aerial tuber created_by: Ramona creation_date: 2010-05-27T09:55:39Z [Term] id: PO:0025048 name: subterranean tuber epidermis def: "A tuber epidermis that is part of a subterranean tuber." [POC:curators] comment: The skin of young potatoes is epidermis while the skin of mature potatoes is periderm. synonym: "young potato tuber skin" NARROW [] is_a: PO:0025046 ! tuber epidermis relationship: part_of PO:0004547 ! subterranean tuber created_by: Ramona creation_date: 2010-05-27T09:55:39Z [Term] id: PO:0025049 name: subterranean tuber interfascicular region def: "A tuber interfascicular region that is part of a subterranean tuber storage parenchyma." [ISSN:0003-0589 "Reeve et al. 1969", POC:curators] comment: In potatoes, the interfascicular region extends to the subterranean tuber axillary vegetative buds (eyes). subset: Potato is_a: PO:0025050 ! tuber interfascicular region relationship: part_of PO:0025038 ! subterranean tuber storage parenchyma created_by: Ramona creation_date: 2010-06-01T01:41:11Z [Term] id: PO:0025050 name: tuber interfascicular region def: "An interfascicular region that is part of a tuber storage parenchyma." [POC:curators] synonym: "tuber flesh" BROAD [] xref: OBO_SF_PO:3011081 is_a: PO:0006202 ! interfascicular region relationship: part_of PO:0025036 ! tuber storage parenchyma created_by: Ramona creation_date: 2010-06-01T03:23:27Z [Term] id: PO:0025051 name: aerial tuber interfascicular region def: "A tuber interfascicular region that is part of an aerial tuber storage parenchyma." [POC:curators] is_a: PO:0025050 ! tuber interfascicular region relationship: part_of PO:0025039 ! aerial tuber storage parenchyma created_by: Ramona creation_date: 2010-06-01T03:36:07Z [Term] id: PO:0025052 name: tuber pith def: "A portion of pith that is part of a tuber storage parenchyma." [POC:curators] synonym: "tuber flesh" BROAD [] xref: OBO_SF_PO:3011076 is_a: PO:0005041 ! shoot axis pith relationship: part_of PO:0025036 ! tuber storage parenchyma created_by: Ramona creation_date: 2010-06-01T04:04:39Z [Term] id: PO:0025053 name: subterranean tuber pith def: "A portion of tuber pith that is part of a subterranean tuber storage parenchyma." [ISSN:0003-0589 "Reeve et al. 1969", POC:curators] comment: In potatoes, this is part of the flesh. subset: Potato synonym: "water core" NARROW [ISSN:0003-0589 "Reeve et al. 1969"] is_a: PO:0025052 ! tuber pith relationship: part_of PO:0025038 ! subterranean tuber storage parenchyma created_by: Ramona creation_date: 2010-06-01T04:06:52Z [Term] id: PO:0025054 name: aerial tuber pith def: "A portion of tuber pith that is part of an aerial tuber storage parenchyma." [POC:curators] is_a: PO:0025052 ! tuber pith relationship: part_of PO:0025039 ! aerial tuber storage parenchyma created_by: Ramona creation_date: 2010-06-01T04:06:58Z [Term] id: PO:0025055 name: tuber cortex def: "A portion of stem cortex that is part of a tuber storage parenchyma." [POC:curators] xref: OBO_SF_PO:3011079 is_a: PO:0000223 ! shoot axis cortex relationship: part_of PO:0025036 ! tuber storage parenchyma created_by: rwalls creation_date: 2010-06-02T02:51:28Z [Term] id: PO:0025056 name: aerial tuber cortex def: "Aportion of tuber cortex that is part of an aerial tuber storage parenchyma." [POC:curators] is_a: PO:0025055 ! tuber cortex intersection_of: PO:0025055 ! tuber cortex intersection_of: part_of PO:0025039 ! aerial tuber storage parenchyma relationship: part_of PO:0025039 ! aerial tuber storage parenchyma created_by: Ramona creation_date: 2010-06-03T08:05:23Z [Term] id: PO:0025057 name: subterranean tuber cortex def: "A portion of tuber cortex that is part of a subterranean tuber storage parenchyma." [ISSN:0003-0589 "Reeve et al. 1969", POC:curators] synonym: "Outer storage tissue" EXACT [ISSN:0003-0589 "Reeve et al. 1969"] is_a: PO:0025055 ! tuber cortex intersection_of: PO:0025055 ! tuber cortex intersection_of: part_of PO:0025038 ! subterranean tuber storage parenchyma relationship: part_of PO:0025038 ! subterranean tuber storage parenchyma created_by: Ramona creation_date: 2010-06-03T08:05:23Z [Term] id: PO:0025058 name: perimedullary zone def: "A portion of parenchyma that is the outer layer of a portion of pith." [ISBN:0471244554] comment: The term perimedullary zone is only used when the outer layer of the pith is distinct from the inner layer. xref: OBO_SF_PO:3011661 is_a: PO:0005421 ! parenchyma relationship: part_of PO:0006109 ! pith created_by: Ramona creation_date: 2010-06-03T12:52:12Z [Term] id: PO:0025059 name: portion of ground tissue def: "Any portion of plant tissue other than epidermis or vascular tissue." [ISBN:0-7167-1007-2, ISBN:0471244554] comment: Develops from the ground meristem (eg. meristem L2 and meristem L3). synonym: "fundamental tissue" EXACT [ISBN:0471244554 "Esau Plant Anatomy"] xref: OBO_SF_PO:3007983 is_a: PO:0009007 ! portion of plant tissue created_by: cooperl creation_date: 2009-12-17T03:06:13Z [Term] id: PO:0025060 name: lamina def: "A regional part of an anatomical structure that is enlarged through lateral growth." [POCXX:curaors] xref: OBO_SF_PO:2971884 is_a: PO:0025001 ! cardinal organ part created_by: cooperl creation_date: 2009-12-18T11:23:59Z [Term] id: PO:0025061 name: tuber perimedullary zone def: "A perimedullary zone that is part of a tuber pith." [POC:curators] synonym: "tuber flesh" BROAD [] is_a: PO:0025064 ! shoot axis perimedullary zone relationship: part_of PO:0025052 ! tuber pith created_by: rwalls creation_date: 2010-06-04T12:58:17Z [Term] id: PO:0025062 name: aerial tuber perimedullary zone def: "A tuber perimedullary zone that is part of an aerial tuber pith." [POC:curators] is_a: PO:0025061 ! tuber perimedullary zone relationship: part_of PO:0025054 ! aerial tuber pith created_by: rwalls creation_date: 2010-06-04T01:00:13Z [Term] id: PO:0025063 name: subterranean tuber perimedullary zone def: "A tuber perimedullary zone that is part of a subterranean tuber pith." [ISSN:0003-0589 "Reeve et al. 1969", POC:curators] subset: Potato is_a: PO:0025061 ! tuber perimedullary zone relationship: part_of PO:0025053 ! subterranean tuber pith created_by: rwalls creation_date: 2010-06-04T01:00:13Z [Term] id: PO:0025064 name: shoot axis perimedullary zone def: "A perimedullary zone that is part of a shoot axis pith." [POC:curators] comment: Can occur in a stem or branch. synonym: "branch perimedullary zone" NARROW [] synonym: "stem perimedullary zone" NARROW [] is_a: PO:0025058 ! perimedullary zone relationship: part_of PO:0005041 ! shoot axis pith created_by: Ramona creation_date: 2010-06-04T05:05:16Z [Term] id: PO:0025065 name: root perimedullary zone def: "A perimedullary zone that is part of a root pith." [POC:curators] is_a: PO:0025058 ! perimedullary zone relationship: part_of PO:0005040 ! root pith created_by: Ramona creation_date: 2010-06-04T05:05:36Z [Term] id: PO:0025066 name: stalk def: "A cardinal organ part that is elongated and sub-cylindrical to cylindrical and supports another cardinal organ part." [POC:curators] comment: Some stalks may be ridged or grooved. xref: PATO:0001873 "cylindrical" xref: PATO:0002226 "subscylindrical" xref: OBO_SF_PO:2903994 xref: OBO_SF_PO:2972224 is_a: PO:0025001 ! cardinal organ part created_by: cooperl creation_date: 2009-12-18T10:09:17Z [Term] id: PO:0025067 name: seed storage parenchyma def: "A portion of storage parenchyma that is part of a seed." [POC:curators] xref: OBO_SF_PO:3016492 is_a: PO:0025035 ! storage parenchyma relationship: part_of PO:0009010 ! seed created_by: Ramona creation_date: 2010-06-15T11:03:02Z [Term] id: PO:0025068 name: tuber axillary bud meristem def: "An axillary bud meristem that is part of a tuber." [POC:curators] comment: As the bud grows, the meristem switches from being an axillary meristem to being a shoot apical meristem. xref: OBO_SF_PO:3016498 is_a: PO:0000232 ! axillary bud meristem relationship: part_of PO:0004543 ! tuber created_by: Ramona creation_date: 2010-06-15T12:59:57Z [Term] id: PO:0025069 name: aerial tuber axillary bud meristem def: "A tuber axillary bud meristem that is part of an aerial tuber." [POC:curators] is_a: PO:0025068 ! tuber axillary bud meristem relationship: part_of PO:0004548 ! aerial tuber created_by: Ramona creation_date: 2010-06-15T01:03:59Z [Term] id: PO:0025070 name: subterranean tuber axillary bud meristem def: "A tuber axillary bud meristem that is part of a subterranean tuber." [POC:curators] is_a: PO:0025068 ! tuber axillary bud meristem relationship: part_of PO:0004547 ! subterranean tuber created_by: Ramona creation_date: 2010-06-15T01:03:59Z [Term] id: PO:0025071 name: terminal reproductive bud def: "A terminal bud that develops into a reproductive structure." [POC:curators] xref: OBO_SF_PO:3020771 is_a: PO:0004713 ! terminal bud is_a: PO:0025084 ! reproductive bud created_by: cooperl creation_date: 2010-06-24T01:09:49Z [Term] id: PO:0025072 name: axillary reproductive bud def: "An axillary bud that develops into a reproductive structure." [POC:curators] xref: OBO_SF_PO:3020771 is_a: PO:0004709 ! axillary bud is_a: PO:0025084 ! reproductive bud created_by: cooperl creation_date: 2010-06-24T01:29:20Z [Term] id: PO:0025073 name: branch def: "A shoot axis that develops from an axillary meristem or from equal divisions of the shoot apical meristem." [POC:curators] comment: Branches arise from axillary meristems in vascular plants and from divisions of the shoot apical meristem in non-vascular plants. synonym: "higher order axis" NARROW [] synonym: "secondary axis" NARROW [] synonym: "tertiary axis" NARROW [] is_a: PO:0025029 ! shoot axis created_by: Ramona creation_date: 2010-07-01T04:21:46Z [Term] id: PO:0025074 name: embryo sac def: "A female gametophyte in angiosperms." [POC:curators] is_a: PO:0020092 ! female gametophyte created_by: Ramona creation_date: 2010-07-01T02:50:36Z [Term] id: PO:0025075 name: non-vascular leaf def: "A leaf in a non-vascular plant." [POC:curators] comment: Include moss and liverwort leaves. Occurs in the gametophytic phase of a plant life cycle. synonym: "gametophyte leaf" EXACT [] is_a: PO:0025034 ! leaf created_by: Ramona creation_date: 2010-07-12T01:31:59Z [Term] id: PO:0025076 name: axillary strobilus bud def: "An axillary reproductive bud that develops into a strobilus." [POC:curators] is_a: PO:0025072 ! axillary reproductive bud is_a: PO:0025085 ! strobilus bud created_by: Ramona creation_date: 2010-07-12T02:30:24Z [Term] id: PO:0025077 name: terminal strobilus bud def: "A terminal reproductive bud that develops into a strobilus." [POC:curators] is_a: PO:0025071 ! terminal reproductive bud is_a: PO:0025085 ! strobilus bud created_by: Ramona creation_date: 2010-07-12T02:31:42Z [Term] id: PO:0025078 name: placenta def: "A portion of plant tissue to which ovules or seed are attached." [ISBN:0-7167-1007-2] is_a: PO:0009007 ! portion of plant tissue created_by: Ramona creation_date: 2010-07-13T04:36:23Z [Term] id: PO:0025079 name: aerial tuber axillary shoot def: "An axillary shoot that develops from an aerial tuber axillary bud." [POC:curators] is_a: PO:0025003 ! tuber axillary shoot relationship: part_of PO:0004548 ! aerial tuber created_by: Ramona creation_date: 2010-09-16T03:18:48Z [Term] id: PO:0025080 name: branch internode def: "A shoot internode that is part of a branch." [POC:curators] is_a: PO:0005005 ! shoot internode created_by: Ramona creation_date: 2010-07-16T10:12:21Z [Term] id: PO:0025081 name: subterranean tuber axillary shoot def: "An axillary shoot that develops from a subterranean tuber axillary bud." [POC:curators] comment: See also subterranean tuber axillary bud (PO:0025042). subset: Potato synonym: "tuber sprout" EXACT [] is_a: PO:0025003 ! tuber axillary shoot relationship: part_of PO:0004547 ! subterranean tuber created_by: Ramona creation_date: 2010-09-16T03:18:48Z [Term] id: PO:0025082 name: reproductive shoot system def: "A shoot system that occurs in the sporophytic phase and has as part at least one sporangium." [POC:curators] is_a: PO:0009006 ! shoot system created_by: Ramona creation_date: 2010-09-17T09:49:10Z [Term] id: PO:0025083 name: strobilus def: "A reproductive shoot system consisting of a number of modified leaves (sporophylls) or ovule-bearing scales grouped terminally on a stem." [POC:curators, Raven:et al] synonym: "cone" RELATED [] is_a: PO:0025082 ! reproductive shoot system created_by: Ramona creation_date: 2010-09-17T09:51:22Z [Term] id: PO:0025084 name: reproductive bud def: "A bud that develops into a reproductive shoot system." [POC:curators] is_a: PO:0000055 ! bud is_a: PO:0025082 ! reproductive shoot system created_by: Ramona creation_date: 2010-09-17T01:52:05Z [Term] id: PO:0025085 name: strobilus bud def: "A bud that develops into a strobilus." [POC:curators] is_a: PO:0025084 ! reproductive bud created_by: Ramona creation_date: 2010-09-17T01:54:02Z [Typedef] id: derives_from name: derives_from created_by: Ramona creation_date: 2010-07-01T02:45:12Z [Typedef] id: develops_from name: develops_from [Typedef] id: has_part name: has_part namespace: plant_ontology [Typedef] id: part_of name: part_of namespace: plant_ontology is_transitive: true