format-version: 1.0 version: $Revision: 1.62 $ date: 28:10:2008 14:23 saved-by: cwt6 auto-generated-by: DAG-Edit 1.419 rev 3 default-namespace: plant_ontology subsetdef: Rice "Term used for rice" subsetdef: Maize "Term used for maize" subsetdef: Citrus "Term used for citrus" subsetdef: Tomato "Term used for tomato" subsetdef: Arabidopsis "Term used for Arabidopsis" subsetdef: Poaceae "Term used for grasses" subsetdef: reference "reference plant structure term" [Term] id: PO:0000001 name: embryo proper namespace: plant_structure 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 namespace: plant_structure def: "A multicellular layer with outer epidermis and an inner endothecium." [GR:pj] subset: reference relationship: part_of PO:0009070 ! microsporangium [Term] id: PO:0000003 name: whole plant namespace: plant_structure def: "The entire plant\, including roots\, shoots and leaves\, at any stage of its life cycle." [TAIR:ki] comment: This term is so general that it should be avoided whenever possible. subset: reference is_a: PO:0009011 ! plant structure [Term] id: PO:0000004 name: in vitro cultured cell, tissue and organ namespace: plant_structure def: "Isolated and grown plant protoplast\, cell\, tissue and organ\, involving\, as a common factor\, growth of microbe-free plant material in sterile environment\, such as sterilized nutrient medium in a test tube or petri dish." [TAIR:ki] is_a: PO:0009011 ! plant structure [Term] id: PO:0000005 name: cultured cell namespace: plant_structure 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" [] is_a: PO:0000004 ! in vitro cultured cell, tissue and organ is_a: PO:0009002 ! plant cell [Term] id: PO:0000006 name: cultured protoplast namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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: cultured callus namespace: plant_structure 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 cultured cell, tissue and organ is_a: PO:0005052 ! callus [Term] id: PO:0000010 name: cultured embryo namespace: plant_structure 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 cultured cell, tissue and organ [Term] id: PO:0000011 name: cultured somatic embryo namespace: plant_structure 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 namespace: plant_structure 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" [] relationship: develops_from PO:0020100 ! hypocotyl relationship: part_of PO:0006341 ! primary shoot [Term] id: PO:0000013 name: cauline leaf namespace: plant_structure 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 ! leaf [Term] id: PO:0000014 name: rosette leaf namespace: plant_structure 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: n Arabidopsis\, vegetative development is characterized by the production of the rosette leaves. is_a: PO:0009025 ! leaf [Term] id: PO:0000015 name: cotyledon primordium namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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" [] is_a: PO:0009025 ! leaf relationship: part_of PO:0000037 ! shoot apex [Term] id: PO:0000018 name: ovule primordium namespace: plant_structure 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 namespace: plant_structure def: "The very first appearance of gynoecium. " [TAIR:ki] is_a: PO:0009062 ! gynoecium [Term] id: PO:0000020 name: starch sheath cell namespace: plant_structure 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 namespace: plant_structure def: "The very first appearance of a petal. " [TAIR:ki] is_a: PO:0009032 ! petal [Term] id: PO:0000022 name: cuticle namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "The portion of the root including the meristem and root cap." [TAIR:ki] relationship: part_of PO:0009005 ! root [Term] id: PO:0000026 name: primary root tip namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Tip portion of the pollen tube that is rapidly growing." [TAIR:ki] relationship: part_of PO:0006345 ! pollen tube [Term] id: PO:0000029 name: root hair tip namespace: plant_structure 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 namespace: plant_structure 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 ! tissue [Term] id: PO:0000031 name: lenticel namespace: plant_structure def: "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\, through which gaseous exchange occurs." [ISBN: 0471245208] relationship: part_of PO:0009047 ! stem [Term] id: PO:0000032 name: tetrad of microspores namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Total of the vascular tissues in their specific arrangement in a plant or plant organ." [ISBN:0471245208] is_a: PO:0009007 ! tissue [Term] id: PO:0000035 name: cotyledon vascular system namespace: plant_structure def: "Vascular system of the cotyledon." [TAIR:ki] relationship: part_of PO:0008011 ! embryo vascular system relationship: part_of PO:0020030 ! cotyledon [Term] id: PO:0000036 name: leaf vascular system namespace: plant_structure def: "Vascular system of the leaf." [TAIR:ki] is_a: PO:0000034 ! vascular system relationship: part_of PO:0009025 ! leaf relationship: part_of PO:0020138 ! leaf vein [Term] id: PO:0000037 name: shoot apex namespace: plant_structure 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 [Term] id: PO:0000038 name: primary endosperm cell namespace: plant_structure 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:0009002 ! plant cell relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0000039 name: stem vascular system namespace: plant_structure def: "Vascular tissues in their specific arrangements in the stem" [TAIR:ki] is_a: PO:0000034 ! vascular system relationship: part_of PO:0009047 ! stem [Term] id: PO:0000040 name: adventitious root nodule namespace: plant_structure 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" [] is_a: PO:0003023 ! root nodule relationship: part_of PO:0000042 ! shoot borne root [Term] id: PO:0000041 name: epidermal cork cell namespace: plant_structure 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.\n is_a: PO:0004718 ! short cell [Term] id: PO:0000042 name: shoot borne root alt_id: PO:0003007 alt_id: PO:0020129 namespace: plant_structure def: "Post-embryonic root developed from shoot tissue." [GR:pj, TAIR:ki] subset: reference synonym: "adventitious root" [] synonym: "stilt root" [] is_a: PO:0009005 ! root [Term] id: PO:0000043 name: crown root namespace: plant_structure 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 namespace: plant_structure 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" [] is_a: PO:0003005 ! nodal root [Term] id: PO:0000045 name: embryonic root namespace: plant_structure 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 namespace: plant_structure def: "Root formed within the scutelar node of the embryo in some monocotyledonous plants." [TAIR:ki] subset: reference synonym: "lateral seminal root" [] synonym: "scutellar nodal root" [] synonym: "secondary root" [] is_a: PO:0000045 ! embryonic root is_a: PO:0003005 ! nodal root [Term] id: PO:0000047 name: leaf lamina epidermis namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Epidermal layer 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 namespace: plant_structure 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 namespace: plant_structure def: "The primary tissue located between the vascular system and the epidermis of the petiole." [TAIR:ki] is_a: PO:0005708 ! cortex relationship: part_of PO:0020038 ! petiole [Term] id: PO:0000054 name: petal vascular system namespace: plant_structure 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 namespace: plant_structure def: "Undeveloped shoot." [POC:curators] relationship: part_of PO:0009006 ! shoot [Term] id: PO:0000056 name: floral bud namespace: plant_structure def: "Bud that develops into a flower." [POC:curators] is_a: PO:0000055 ! bud [Term] id: PO:0000057 name: inflorescence bud namespace: plant_structure def: "Bud that develops into an inflorescence." [POC:curators] is_a: PO:0000055 ! bud [Term] id: PO:0000058 name: vegetative bud namespace: plant_structure def: "Bud that develops into a long or short shoot." [POC:curators] is_a: PO:0000055 ! bud [Term] id: PO:0000059 name: root initial cell namespace: plant_structure 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" [] is_a: PO:0020147 ! root apical meristem [Term] id: PO:0000060 name: root cortex-endodermis initial cell namespace: plant_structure def: "Cell that produces root cortex and endodermis. In direct contact with quiescent center." [TAIR:ki] synonym: "root cortex-endodermis stem cell" [] is_a: PO:0000059 ! root initial cell [Term] id: PO:0000061 name: lateral root-cap-epidermal initial cell namespace: plant_structure def: "Cell that produces lateral root-cap cells and root epidermis. " [POC:curators] synonym: "lateral root-cap-epidermal stem cell" [] is_a: PO:0000059 ! root initial cell [Term] id: PO:0000066 name: epithem cell namespace: plant_structure 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_analog: CL:0000074 is_a: PO:0009002 ! plant cell relationship: part_of PO:0005660 ! hydathode [Term] id: PO:0000070 name: meristemoid namespace: plant_structure 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_analog: CL:0000266 is_a: PO:0009002 ! plant cell [Term] id: PO:0000071 name: companion cell namespace: plant_structure 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_analog: CL:0000284 is_a: PO:0009002 ! plant cell relationship: part_of PO:0005043 ! secondary phloem relationship: part_of PO:0006075 ! primary phloem [Term] id: PO:0000074 name: parenchyma cell namespace: plant_structure def: "A relatively unspecialized cell with a nucleate protoplast." [ISBN:0471245208] is_a: PO:0009002 ! plant cell relationship: part_of PO:0005421 ! parenchyma [Term] id: PO:0000075 name: collenchyma cell namespace: plant_structure def: "Elongated living cells with unevenly thickened nonlignified primary walls." [ISBN:0471245208] is_a: PO:0009002 ! plant cell relationship: part_of PO:0005423 ! collenchyma [Term] id: PO:0000076 name: chlorenchyma cell namespace: plant_structure def: "Parenchyma cell containing chloroplasts; a component of leaf mesophyll and other green parenchyma tissue." [ISBN:0471245208] xref_analog: CL:0000472 is_a: PO:0000074 ! parenchyma cell relationship: part_of PO:0005426 ! chlorenchyma [Term] id: PO:0000077 name: sclerenchyma cell namespace: plant_structure def: "Usually dead cell variable in form and size\, with more or less thick\, often lignified\, secondary walls." [ISBN:0471245208] xref_analog: CL:0000276 is_a: PO:0009002 ! plant cell relationship: part_of PO:0005427 ! sclerenchyma [Term] id: PO:0000078 name: transfer cell namespace: plant_structure 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_analog: CL:0000370 is_a: PO:0009002 ! plant cell [Term] id: PO:0000079 name: fusiform initial alt_id: PO:0000275 namespace: plant_structure 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" [] synonym: "xylem mother cell" [] xref_analog: CL:0000009 is_a: PO:0000295 ! cambial initial [Term] id: PO:0000081 name: axial cell namespace: plant_structure 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_analog: CL:0000363 is_a: PO:0009002 ! plant cell relationship: develops_from PO:0000079 ! fusiform initial [Term] id: PO:0000082 name: ray initial namespace: plant_structure def: "A cell in the vascular cambium that gives rise to ray cells of the secondary xylem and secondary phloem." [ISBN:0471245208] xref_analog: CL:0000316 is_a: PO:0000295 ! cambial initial [Term] id: PO:0000084 name: sperm cell alt_id: PO:0020098 namespace: plant_structure def: "A haploid male reproductive cell (usually two in number); during double fertilization\, one fuses with the female gamete (egg cell) to produce a zygote while another fusses with the two polar nuclei of the central cell to give rise to endosperm." [TAIR:ki] subset: reference synonym: "sperm nucleus" [] xref_analog: CL:0000366 is_a: PO:0009002 ! plant cell relationship: develops_from PO:0020097 ! generative cell relationship: part_of PO:0020091 ! male gametophyte [Term] id: PO:0000112 name: stem epidermis namespace: plant_structure def: "Epidermal layer of the stem." [TAIR:lr] synonym: "culm epidermis" [] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0009047 ! stem [Term] id: PO:0000115 name: socket cell namespace: plant_structure def: "Cell that surrounds a trichome and provides its support." [ISBN:0471245208, PMID:15319479] synonym: "cell located at the base of the trichome" [] synonym: "trichome support cell" [] xref_analog: CL:0000297 is_a: PO:0004013 ! epidermal cell relationship: develops_from PO:0000349 ! epidermal initial [Term] id: PO:0000146 name: abscission zone namespace: plant_structure 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" [] is_a: PO:0009007 ! tissue [Term] id: PO:0000191 name: synergid namespace: plant_structure 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_analog: CL:0000288 is_a: PO:0009002 ! plant cell relationship: part_of PO:0020096 ! egg apparatus [Term] id: PO:0000198 name: free nuclear endosperm namespace: plant_structure def: "Endosperm in which at least the first karyokinesis is not followed by cytokinesis." [ISBN:0080374913, ISBN:0471245194] synonym: "cenocytic endosperm" [] synonym: "coenocytic endosperm" [] synonym: "nuclear endosperm" [] is_a: PO:0009089 ! endosperm [Term] id: PO:0000199 name: cellular endosperm namespace: plant_structure 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 namespace: plant_structure def: "The region of the endosperm closest to the micropyle of the seed." [TAIR:lr] synonym: "micropylar region" [] relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0000201 name: chalazal cyst namespace: plant_structure def: "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" [] relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0000207 name: nectary epidermis namespace: plant_structure def: "The epidermal layer of the nectary." [TAIR:lr] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0009035 ! nectary [Term] id: PO:0000223 name: stem cortex namespace: plant_structure def: "The primary tissue located between the vascular system and the epidermis of the stem." [GR:pj, ISBN:047124529] is_a: PO:0005708 ! cortex relationship: part_of PO:0009047 ! stem [Term] id: PO:0000224 name: central zone namespace: plant_structure 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" [] relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0000225 name: peripheral zone namespace: plant_structure def: "Organogenic region of the meristem\, characterized by higher rates of cell division." [ISBN:0521288959, TAIR:lr] synonym: "peripheral meristem" [] relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0000226 name: rib zone namespace: plant_structure def: "The region of the meristem that lies below the central zone and is flanked by the peripheral zone" [ISBN:0521288959, TAIR:lr] synonym: "file meristem" [] relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0000229 name: floral meristem namespace: plant_structure def: "Meristem that gives rise to the floral organs." [GR:pj] synonym: "floral apical meristem" [] is_a: PO:0009013 ! meristem relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0000230 name: inflorescence meristem namespace: plant_structure def: "Meristem that gives rise to the inflorescence." [GR:pj] is_a: PO:0009013 ! meristem relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0000232 name: axillary bud meristem namespace: plant_structure def: "Meristems formed in the axil of the leaf." [TAIR:lr] synonym: "axillary meristem" [] is_a: PO:0006079 ! shoot meristem [Term] id: PO:0000244 name: functional megaspore namespace: plant_structure def: "The megaspore(s) that forms the embryo sac." [TAIR:lr] xref_analog: CL:0000433 is_a: PO:0020019 ! megaspore [Term] id: PO:0000245 name: degenerate megaspore namespace: plant_structure def: "In monosporic and bisporic megasporogenesis\: the megaspore(s) that would not participate in megagametogenesis." [TAIR:lr] xref_analog: CL:0000475 is_a: PO:0020019 ! megaspore [Term] id: PO:0000252 name: endodermis alt_id: PO:0006064 namespace: plant_structure def: "The innermost layer of the cortex in roots and stems of seed plants. The layer of tissue forming a sheath around the vascular region and often having a casparian strip in its anticlinal walls; it may have secondary walls later." [ISBN:047124529] synonym: "endodermoid" [] relationship: part_of PO:0005708 ! cortex [Term] id: PO:0000256 name: root hair namespace: plant_structure 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 namespace: plant_structure def: "The primary tissue located between the vascular system and the epidermis of the root." [GR:pj, ISBN:047125208] comment: In dicots and gymnosperms\, the cortex consists of mainly parenchyma cells. In monocots sclerenchyma develops in addition to parenchyma. is_a: PO:0005708 ! cortex relationship: part_of PO:0009005 ! root [Term] id: PO:0000262 name: trichoblast namespace: plant_structure 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" [] xref_analog: 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 namespace: plant_structure 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" [] xref_analog: 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 namespace: plant_structure def: "The first formed elements of the primary xylem." [ISBN:047125208] relationship: part_of PO:0005849 ! primary xylem [Term] id: PO:0000273 name: xylem element namespace: plant_structure def: "A cell making up xylem tissue." [ISBN:0471245208] xref_analog: CL:0000298 is_a: PO:0000081 ! axial cell is_a: PO:0009002 ! plant cell [Term] id: PO:0000274 name: xylem fiber namespace: plant_structure 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 namespace: plant_structure 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_analog: CL:0000282 is_a: PO:0004013 ! epidermal cell [Term] id: PO:0000283 name: idioblast namespace: plant_structure 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 namespace: plant_structure def: "An epidermal cell associated with a stoma and at least morphologically distinguishable from the other epidermal cells." [ISBN:047124520] synonym: "accessory cell" [] xref_analog: 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 namespace: plant_structure 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. synonym: "sieve element" [] synonym: "sieve tube element" [] xref_analog: CL:0000268 xref_analog: CL:0000543 is_a: PO:0009002 ! plant cell relationship: part_of PO:0005043 ! secondary phloem relationship: part_of PO:0006075 ! primary phloem [Term] id: PO:0000290 name: tracheary element namespace: plant_structure def: "General term for any water conducting cell\, tracheid or vessel member." [ISBN:0471245208] xref_analog: CL:0000672 is_a: PO:0000273 ! xylem element is_a: PO:0009002 ! plant cell relationship: part_of PO:0005848 ! secondary xylem relationship: part_of PO:0005849 ! primary xylem [Term] id: PO:0000293 name: guard cell namespace: plant_structure 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_analog: 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 namespace: plant_structure 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" [] xref_analog: CL:0000272 is_a: PO:0004011 ! initial cell relationship: part_of PO:0005598 ! vascular cambium [Term] id: PO:0000301 name: tracheid namespace: plant_structure 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_analog: CL:0000331 is_a: PO:0000290 ! tracheary element [Term] id: PO:0000309 name: nectary parenchyma namespace: plant_structure def: "Relatively unspecialized tissue present in the nectary." [TAIR:lr] is_a: PO:0005421 ! parenchyma [Term] id: PO:0000332 name: pavement cell namespace: plant_structure def: "Epidermal cell with characteristic sinuous anticlinal cell walls that overall give a jigsaw like appearance to the leaf epidermis." [ISBN:087694289] xref_analog: 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 namespace: plant_structure def: "A relatively unspecialized cell that will give rise to specialized cell types of the epidermis." [TAIR:lr] xref_analog: CL:0000538 is_a: PO:0004011 ! initial cell [Term] id: PO:0000351 name: guard mother cell namespace: plant_structure def: "Epidermal cell that divides to produce the guard cells." [ISBN:0471245208] xref_analog: 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 namespace: plant_structure def: "Cell containing glucosinolates (\"mustard oil glucosides\") and myrosinases\, enzymes hydrolyzing the glucosinolates." [ISBN:0471245208] xref_analog: CL:0000368 is_a: PO:0009002 ! plant cell [Term] id: PO:0000353 name: passage cell namespace: plant_structure def: "Cell in exodermis or endodermis that remains thin walled when the associated cells develop thick secondary walls." [ISBN:0471245208] xref_analog: CL:0000245 is_a: PO:0009002 ! plant cell [Term] id: PO:0000355 name: fiber tracheid namespace: plant_structure 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_analog: CL:0000258 is_a: PO:0000274 ! xylem fiber [Term] id: PO:0000372 name: metaxylem namespace: plant_structure def: "Part of the primary xylem that differentiates after the protoxylem and before the secondary xylem\, if any of the latter is formed." [ISBN:047125208] relationship: part_of PO:0005849 ! primary xylem [Term] id: PO:0000373 name: mucilage cell namespace: plant_structure 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 namespace: plant_structure 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_analog: CL:0000264 is_a: PO:0000295 ! cambial initial relationship: part_of PO:0005043 ! secondary phloem [Term] id: PO:0000423 name: zygote namespace: plant_structure def: "Diploid cell produced by the fusion of sperm cell nucleus and egg cell." [TAIR:ki] xref_analog: CL:0000365 is_a: PO:0009002 ! plant cell [Term] id: PO:0000431 name: megasporocyte namespace: plant_structure def: "A diploid (2n) cell that undergoes meiosis and produces four haploid (1n) megaspores." [ISBN:0471245208] synonym: "MMC" [] synonym: "megaspore mother cell" [] xref_analog: 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 namespace: plant_structure 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" [] synonym: "stomata" [] 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 namespace: plant_structure 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 namespace: plant_structure def: "The lowermost cell formed after the first division of the zygote." [ISBN:0471245208] xref_analog: CL:0000646 is_a: PO:0009002 ! plant cell relationship: develops_from PO:0000423 ! zygote relationship: part_of PO:0009009 ! embryo [Term] id: PO:0002003 name: vessel member namespace: plant_structure 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" [] synonym: "vessel segment" [] is_a: PO:0000290 ! tracheary element [Term] id: PO:0002004 name: silk scar namespace: plant_structure 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 namespace: plant_structure 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 relationship: part_of PO:0009005 ! root [Term] id: PO:0003003 name: primary root elongation zone namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Total of the vascular tissues in their specific arrangements in the root." [ISBN:0471245208, TAIR:ki] 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" [] is_a: PO:0000034 ! vascular system relationship: part_of PO:0020124 ! root stele [Term] id: PO:0003014 name: lateral root elongation zone namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A slender\, prostrate or trailing above-ground stem which produces roots and sometimes erect shoots at its nodes." [APWeb:Glossary] subset: reference synonym: "runner" [] is_a: PO:0009006 ! shoot [Term] id: PO:0004000 name: apical cell namespace: plant_structure def: "The uppermost cell formed after the first division of the zygote." [ISBN:0471245208] is_a: PO:0009002 ! plant cell relationship: develops_from PO:0000423 ! zygote relationship: part_of PO:0009009 ! embryo [Term] id: PO:0004001 name: bulliform cell namespace: plant_structure 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" [] is_a: PO:0004013 ! epidermal cell relationship: part_of PO:0006016 ! leaf epidermis [Term] id: PO:0004002 name: contact cell namespace: plant_structure 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 namespace: plant_structure def: "Tissue centrifugally derived from cork cambium\, nonliving at maturity\, and having suberized walls. " [ISBN:0471245208, POC:curators] comment: Protective in function because the walls are highly impervious to water. synonym: "cork" [] synonym: "phellem" [] is_a: PO:0009007 ! tissue relationship: develops_from PO:0005599 ! cork cambium [Term] id: PO:0004004 name: epithelium cell namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A Cell that constitutes leaf mesophyll." [TAIR:ki] is_a: PO:0000076 ! chlorenchyma cell relationship: part_of PO:0006070 ! mesophyll [Term] id: PO:0004007 name: phelloid cell namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A cell synthesizing protoplasm and producing new cells by division and with only a primary cell wall." [ISBN:0471245208] xref_analog: CL:0000685 is_a: PO:0009002 ! plant cell relationship: part_of PO:0009013 ! meristem [Term] id: PO:0004011 name: initial cell namespace: plant_structure 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] broad_synonym: "stem cell" [] xref_analog: CL:0000034 is_a: PO:0004010 ! meristematic cell [Term] id: PO:0004012 name: secretory cell namespace: plant_structure 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 namespace: plant_structure def: "Cell that constitutes dermal tissue." [TAIR:ki] xref_analog: CL:0000362 is_a: PO:0009002 ! plant cell relationship: part_of PO:0005679 ! epidermis [Term] id: PO:0004509 name: secretory trichome namespace: plant_structure def: "A trichome that secretes or sequesters a substance." [POC:curators] is_a: PO:0000282 ! trichome is_a: PO:0005656 ! secretory tissue [Term] id: PO:0004510 name: non-secretory trichome namespace: plant_structure def: "Trichome that does not have secretory function." [POC:curators] is_a: PO:0000282 ! trichome [Term] id: PO:0004511 name: seed hair namespace: plant_structure def: "Trichome that develops from seed coat epidermis and is often long with putative dispersal function. " [POC:curators] synonym: "seed trichome" [] 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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" [] is_a: PO:0004514 ! growth ring [Term] id: PO:0004516 name: late wood namespace: plant_structure 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" [] is_a: PO:0004514 ! growth ring [Term] id: PO:0004517 name: growth ring boundary namespace: plant_structure def: "Boundary between two growth rings." [POC:curators] is_a: PO:0004514 ! growth ring [Term] id: PO:0004518 name: bark namespace: plant_structure 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 ! tissue relationship: develops_from PO:0005043 ! secondary phloem [Term] id: PO:0004519 name: phloem fiber namespace: plant_structure def: "A fiber in phloem." [POC:curators] relationship: part_of PO:0005043 ! secondary phloem [Term] id: PO:0004520 name: libriform fiber namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Cambium occurring within xylem." [POC:curators] is_a: PO:0005598 ! vascular cambium [Term] id: PO:0004524 name: included phloem namespace: plant_structure def: "Phloem produced by included vascular cambium." [POC:curators] relationship: part_of PO:0005043 ! secondary phloem [Term] id: PO:0004525 name: wood parenchyma cell namespace: plant_structure def: "Parenchyma cell occurring within secondary xylem." [POC:curators] is_a: PO:0000074 ! parenchyma cell [Term] id: PO:0004526 name: axial wood parenchyma cell namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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_analog: CL:0000618 is_a: PO:0004528 ! upright wood ray parenchyma cell [Term] id: PO:0004532 name: wood parenchyma namespace: plant_structure def: "Parenchymatous tissue occurring in the wood." [POC:curators] is_a: PO:0005848 ! secondary xylem [Term] id: PO:0004533 name: axial wood parenchyma namespace: plant_structure 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 namespace: plant_structure def: "Radially oriented parenchyma tissue in secondary xylem. " [POC:curators] is_a: PO:0004532 ! wood parenchyma [Term] id: PO:0004535 name: fruit placenta namespace: plant_structure def: "A more or less localized region within a fruit to which seeds are attached." [POC:curators] subset: Tomato relationship: part_of PO:0009001 ! fruit [Term] id: PO:0004536 name: fruit pedicel namespace: plant_structure def: "Basal part of the ultimate branch of the infructescence." [POC:curators] subset: Tomato relationship: part_of PO:0009001 ! fruit [Term] id: PO:0004537 name: adventitious embryo namespace: plant_structure def: "Embryo derived directly from nucelus cells without involving embryo sac cells." [POC:curators] is_a: PO:0009009 ! embryo [Term] id: PO:0004538 name: indeterminate nodule namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Central axis of the fruit." [POC:curators] subset: Tomato relationship: part_of PO:0009001 ! fruit [Term] id: PO:0004542 name: rhizome namespace: plant_structure def: "Underground shoot" [POC:curators] subset: reference is_a: PO:0009006 ! shoot [Term] id: PO:0004543 name: tuber namespace: plant_structure def: "Swollen storage shoot with determinate growth." [POC:curators] subset: reference is_a: PO:0009006 ! shoot [Term] id: PO:0004544 name: root borne shoot namespace: plant_structure def: "Shoot that is initiated from a root." [POC:curators] synonym: "sucker shoot" [] is_a: PO:0009006 ! shoot [Term] id: PO:0004545 name: shoot borne shoot namespace: plant_structure def: "Shoot that is initiated from a shoot." [POC:curators] subset: reference synonym: "branch" [] is_a: PO:0009006 ! shoot [Term] id: PO:0004546 name: epicomic shoot namespace: plant_structure def: "Shoot developing from a trunk." [POC:curators] is_a: PO:0004545 ! shoot borne shoot [Term] id: PO:0004547 name: subterranean tuber namespace: plant_structure def: "A swollen rhizome or a part of the rhizome with determinate growth." [POC:curator] comment: This has nothing to do with the underground swollen storage organ of Ipomoea which is swollen. is_a: PO:0004543 ! tuber relationship: part_of PO:0004542 ! rhizome [Term] id: PO:0004548 name: aerial tuber namespace: plant_structure def: "An axillary shoot with a swollen stem.\n" [POC:curators] is_a: PO:0004543 ! tuber is_a: PO:0006343 ! axillary shoot [Term] id: PO:0004700 name: middle layer namespace: plant_structure 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 relationship: develops_from PO:0006008 ! inner secondary parietal cell layer relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0004701 name: short shoot namespace: plant_structure def: "Shoot in which the internodes elongate little or at all\, bearing reproductive structures and/or leaves." [APWeb:Glossary] synonym: "brachyblast" [] synonym: "bud spur" [] is_a: PO:0006343 ! axillary shoot [Term] id: PO:0004702 name: long shoot namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "The very first appearance of a sepal." [POC:curators] is_a: PO:0009031 ! sepal [Term] id: PO:0004705 name: stamen primordium namespace: plant_structure def: "The very first appearance of a stamen." [POC:curators] is_a: PO:0009029 ! stamen [Term] id: PO:0004706 name: flower primordium namespace: plant_structure def: "The very first appearance of a flower." [POC:curators] is_a: PO:0009046 ! flower [Term] id: PO:0004707 name: fruit dehiscence zone namespace: plant_structure 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." [TAIR:ki, GR:pj] comment: Found in dehiscent fruit. subset: Arabidopsis relationship: part_of PO:0009001 ! fruit [Term] id: PO:0004708 name: scutellar node namespace: plant_structure 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] relationship: part_of PO:0009009 ! embryo [Term] id: PO:0004709 name: axillary bud namespace: plant_structure def: "Bud formed in the axil of a leaf or shoot." [POC:curators] subset: reference is_a: PO:0000055 ! bud [Term] id: PO:0004710 name: axillary floral bud namespace: plant_structure def: "Bud formed in the axil of a leaf or shoot that develops into a flower." [POC:curators] is_a: PO:0000056 ! floral bud is_a: PO:0004709 ! axillary bud [Term] id: PO:0004711 name: axillary inflorescence bud namespace: plant_structure def: "Bud formed in the axil of the a leaf or shoot that develops into an inflorescence." [POC:curators] is_a: PO:0000057 ! inflorescence bud is_a: PO:0004709 ! axillary bud [Term] id: PO:0004712 name: axillary vegetative bud namespace: plant_structure def: "Bud formed in the axil of the a leaf or shoot that develops into a long or short shoot and/or leaf(s). " [POC:curators] is_a: PO:0000058 ! vegetative bud is_a: PO:0004709 ! axillary bud [Term] id: PO:0004713 name: terminal bud namespace: plant_structure def: "Bud formed at the apex of shoot." [POC:curators] subset: reference is_a: PO:0000055 ! bud [Term] id: PO:0004714 name: terminal floral bud namespace: plant_structure def: "Bud formed at the apex of shoot that develops into a flower." [POC:curators] is_a: PO:0000056 ! floral bud is_a: PO:0004713 ! terminal bud [Term] id: PO:0004715 name: terminal inflorescence bud namespace: plant_structure def: "Bud formed at the apex of shoot that develops into an inflorescence." [POC:curators] is_a: PO:0000057 ! inflorescence bud is_a: PO:0004713 ! terminal bud [Term] id: PO:0004716 name: terminal vegetative bud namespace: plant_structure def: "Bud formed at the apex of shoot 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Longitudinal groove in the testa through the prominent hilum of the seed." [POC:curators] synonym: "faboid split" [] relationship: part_of PO:0009010 ! seed [Term] id: PO:0004720 name: paraclade namespace: plant_structure def: "Lateral branch which ends in an inflorescence that repeats the main inflorescence." [APWeb:Glossary, ISBN:0521251346] relationship: part_of PO:0009047 ! stem [Term] id: PO:0004721 name: paraclade cortex namespace: plant_structure def: "The primary tissue located between the vascular system and the epidermis of the paraclade." [TAIR:ki] relationship: part_of PO:0004720 ! paraclade [Term] id: PO:0004722 name: pedicel cortex namespace: plant_structure def: "The primary tissue located between the vascular system and the epidermis of the pedicel." [TAIR:ki] is_a: PO:0009052 ! pedicel [Term] id: PO:0004723 name: sepal vascular system namespace: plant_structure 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 namespace: plant_structure def: "Junction point of the embryonic root and hypocotyl." [TAIR:ki] subset: reference relationship: part_of PO:0009006 ! shoot relationship: part_of PO:0019018 ! embryo axis [Term] id: PO:0004725 name: abaxial side of leaf primordium namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A branch that forms from a leaf at the very base of the shoot." [GR:ap] synonym: "basal axillary branch" [] synonym: "ratoon" [] synonym: "tiller" [] is_a: PO:0006343 ! axillary shoot [Term] id: PO:0005002 name: cauline axillary shoot namespace: plant_structure 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" [] is_a: PO:0006343 ! axillary shoot [Term] id: PO:0005003 name: stem trichome namespace: plant_structure def: "Trichome on/from the epidermis of the stem." [TAIR:donghui, PMID:17217456] is_a: PO:0000282 ! trichome relationship: part_of PO:0000112 ! stem epidermis [Term] id: PO:0005004 name: shoot node namespace: plant_structure def: "The region of the shoot where the spikelet\, flower\, floret\, branch\, bud and/or leaves are attached." [GR:pj] subset: reference relationship: part_of PO:0009006 ! shoot [Term] id: PO:0005005 name: shoot internode namespace: plant_structure def: "The region of the shoot present between the two shoot nodes." [GR:pj] subset: reference relationship: part_of PO:0009006 ! shoot [Term] id: PO:0005006 name: articulated laticifer namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A thin partition or membrane that divides a cavity or a mass of tissue in the fruit. IT 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 namespace: plant_structure 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 namespace: plant_structure def: "A thin partition or stretch of cells that are present in the anther dehiscence zone." [GR:pj, GR:cwt] is_a: PO:0000030 ! septum relationship: part_of PO:0005011 ! anther dehiscence zone [Term] id: PO:0005011 name: anther dehiscence zone namespace: plant_structure 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.\n" [PMID:15319479] relationship: part_of PO:0009066 ! anther [Term] id: PO:0005012 name: pedicel vascular system namespace: plant_structure def: "Total of the vascular tissues in their specific arrangement in the pedicel." [TAIR:donghui, PMID:17217456] is_a: PO:0000034 ! vascular system relationship: part_of PO:0009052 ! pedicel [Term] id: PO:0005013 name: hypocotyl epidermis namespace: plant_structure def: "The outermost primary cell layer of the hypocotyl." [TAIR:donghui, PMID:15368128] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0020100 ! hypocotyl [Term] id: PO:0005014 name: embryo cortex namespace: plant_structure def: "Tissue between the vascular system and the epidermis of hypocotyl and root in the embryo.\n" [TAIR:donghui, PMID:16543410] is_a: PO:0005708 ! cortex relationship: part_of PO:0009009 ! embryo [Term] id: PO:0005015 name: embryo endodermis namespace: plant_structure def: "The innermost layer of the cortex in the embryos of seed plants." [TAIR:donghui, PMID:16543410] is_a: PO:0000252 ! endodermis relationship: part_of PO:0009009 ! embryo [Term] id: PO:0005016 name: replum namespace: plant_structure 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 ! tissue relationship: develops_from PO:0020001 ! ovary placenta relationship: part_of PO:0009001 ! fruit [Term] id: PO:0005017 name: flower vascular system namespace: plant_structure def: "Total of the vascular tissues in their specific arrangement in the flower and its parts." [GR:pj] is_a: PO:0000034 ! vascular system is_a: PO:0009046 ! flower [Term] id: PO:0005018 name: stamen vascular system namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A unit strand of the vascular system containing the vascular tissues\, xylem and phloem. In addition vascular cambium is often present. " [GR:pj] relationship: part_of PO:0000034 ! vascular system [Term] id: PO:0005021 name: sepal margin namespace: plant_structure def: "The margin or edge of the sepal." [TAIR:donghui, PMID:15269176] relationship: part_of PO:0009031 ! sepal [Term] id: PO:0005022 name: ovary wall namespace: plant_structure def: "The wall of the ovary that is composed of abaxial (outer) and adaxial (inner) epidermis and a middel layer\, composed of mesophyll cells and a distinct subepidermal adaxial cell layer (as found in Arabidopsis)." [GR:pj, PMID:10332605] synonym: "valve (sensu Brassicaceae)" [] relationship: part_of PO:0009072 ! ovary [Term] id: PO:0005023 name: abaxial epidermis of ovary namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "The middel layer is composed of one or more mesophyll layers composed chlorencymatous cell. 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. relationship: part_of PO:0005022 ! ovary wall [Term] id: PO:0005026 name: root giant cell namespace: plant_structure def: "Multinucleate cell developed by a series of events involving kayokinesis but not cytokinesis of the initial feeding 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." [PMID:15053756, GR:pj] subset: Arabidopsis is_a: PO:0009002 ! plant cell relationship: part_of PO:0003011 ! root vascular system [Term] id: PO:0005027 name: root syncytium cell namespace: plant_structure def: "Multinucleate cell developed by a series of events involving fusion with the neighboring dividing cells. The events are induced by cyst\nnematodes (e.g. Heterodera schachtii) entering the feeding cells (any cells) of the root vascular system." [PMID:15053756, GR:pj] subset: Arabidopsis is_a: PO:0009002 ! plant cell relationship: part_of PO:0003011 ! root vascular system [Term] id: PO:0005028 name: inflorescence vascular system namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A meristem derived directly from the shoot apical meristem and responsible for the primary increase in thickness of the 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 namespace: plant_structure def: "Non-vascular tissue in the center of root." [ISBN:0080280307] is_a: PO:0006109 ! pith relationship: part_of PO:0020124 ! root stele [Term] id: PO:0005041 name: stem pith namespace: plant_structure def: "Non-vascular tissue in the center of stem." [ISBN:0080280307] is_a: PO:0006109 ! pith relationship: part_of PO:0009047 ! stem [Term] id: PO:0005043 name: secondary phloem namespace: plant_structure def: "The phloem tissue formed by the activity of the vascular cambium." [ISBN:0122151704] comment: Part of the bark. is_a: PO:0005417 ! phloem relationship: part_of PO:0009007 ! tissue [Term] id: PO:0005046 name: periderm namespace: plant_structure def: "Secondary protective tissue that replaces the epidermis in stems and root\, rarely in other organs. " [GR:pj, ISBN:047124529] is_a: PO:0009014 ! dermal tissue [Term] id: PO:0005047 name: root periderm namespace: plant_structure def: "Secondary protective tissue that replaces the epidermis in root." [GR:pj] is_a: PO:0005046 ! periderm relationship: part_of PO:0009005 ! root [Term] id: PO:0005048 name: stem periderm namespace: plant_structure def: "Secondary protective tissue that replaces the epidermis in stem." [GR:pj] is_a: PO:0005046 ! periderm relationship: part_of PO:0004518 ! bark relationship: part_of PO:0009047 ! stem [Term] id: PO:0005050 name: phelloderm namespace: plant_structure def: "A tissue often resembling cortical parenchyma produced centripetally by the cork cambium." [ISBN:0080374913] relationship: develops_from PO:0005599 ! cork cambium relationship: part_of PO:0005048 ! stem periderm [Term] id: PO:0005051 name: hypodermis namespace: plant_structure def: "A layer or layers of cells beneath the epidermis that is distinct in appearance from adjacent tissues. It is the outermost layer or layers of cells of the cortex." [GR:pj, ISBN:0080374913] relationship: part_of PO:0005708 ! cortex [Term] id: PO:0005052 name: callus namespace: plant_structure 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 namespace: plant_structure def: "A secretory structure that produces latex." [ISBN:0080374913] is_a: PO:0005656 ! secretory tissue [Term] id: PO:0005057 name: stem hypodermis namespace: plant_structure def: "A layer or layers of cells beneath the stem epidermis distinct in appearance from adjacent tissues." [GR:pj, ISBN:0080374913] is_a: PO:0005051 ! hypodermis relationship: part_of PO:0000223 ! stem cortex relationship: part_of PO:0009047 ! stem [Term] id: PO:0005058 name: stem endodermis namespace: plant_structure def: "The innermost layer of cortex in the stem of seed plants." [GR:pj] is_a: PO:0000252 ! endodermis relationship: part_of PO:0000223 ! stem cortex relationship: part_of PO:0009047 ! stem [Term] id: PO:0005059 name: root endodermis namespace: plant_structure def: "The innermost layer of the cortex in roots of seed plants." [GR:pj] is_a: PO:0000252 ! endodermis relationship: part_of PO:0000258 ! root cortex [Term] id: PO:0005060 name: leaf endodermis namespace: plant_structure def: "The layer of tissue forming a sheath around the vascular region in a leaf." [GR:pj] comment: Often found in the leaf of Gymnosperms and elsewhere. is_a: PO:0000252 ! endodermis relationship: part_of PO:0009025 ! leaf [Term] id: PO:0005349 name: schizo-lysigenous aerenchyma namespace: plant_structure 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 namespace: plant_structure def: "vascular tissue whose principal function is the upward translocation of water and solutes." [GR:pj] comment: See also primary xylem and secondary xylem. is_a: PO:0009015 ! vascular tissue [Term] id: PO:0005360 name: aleurone layer namespace: plant_structure def: "The outermost endosperm tissue of the seeds\, its cells being characterized by presence of protein bodies containing seed storage proteins." [GR:pj, ISBN:0080374913] relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0005415 name: endosperm parenchyma namespace: plant_structure def: "Relatively unspecialized ground tissue present in the seed endosperm\, often devoid of intercellular spaces." [ISBN:0080374913] is_a: PO:0005421 ! parenchyma relationship: part_of PO:0009089 ! endosperm [Term] id: PO:0005417 name: phloem namespace: plant_structure def: "Vascular tissue whose principal function is conducting organic substances." [GR:pj] is_a: PO:0009015 ! vascular tissue [Term] id: PO:0005421 name: parenchyma namespace: plant_structure def: "Relatively unspecialized tissue composed of polyhedral cells typically with thin\, non-lignified cellulose cell walls and nucleate living protoplasts." [GR:pj] synonym: "parenchyma tissue" [] is_a: PO:0009007 ! tissue [Term] id: PO:0005423 name: collenchyma namespace: plant_structure def: "Living tissue composed of more or less elongated cells with thick nonlignified primary cell walls." [GR:pj] synonym: "supporting tissue" [] is_a: PO:0009007 ! tissue [Term] id: PO:0005426 name: chlorenchyma namespace: plant_structure def: "Chloroplast-containing parenchyma tissue." [ISBN:0080374913] synonym: "chlorenchyma tissue" [] is_a: PO:0005421 ! parenchyma [Term] id: PO:0005427 name: sclerenchyma namespace: plant_structure def: "A supporting tissue composed of fibers or sclereids." [ISBN:0080374913] is_a: PO:0009007 ! tissue [Term] id: PO:0005597 name: cambium namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Lateral meristem which produces the phellem (cork) and the phelloderm." [ISBN:0080374913] synonym: "phellogen" [] is_a: PO:0005597 ! cambium relationship: part_of PO:0005048 ! stem periderm [Term] id: PO:0005621 name: angular collenchyma namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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" [] synonym: "tangential collenchyma" [] is_obsolete: true [Term] id: PO:0005645 name: leaf mesophyll namespace: plant_structure 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" [] synonym: "leaf parenchyma" [] is_a: PO:0006070 ! mesophyll relationship: part_of PO:0009025 ! leaf [Term] id: PO:0005647 name: spongy mesophyll namespace: plant_structure 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" [] is_a: PO:0006070 ! mesophyll relationship: part_of PO:0005645 ! leaf mesophyll [Term] id: PO:0005648 name: palisade mesophyll namespace: plant_structure 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" [] is_a: PO:0006070 ! mesophyll relationship: part_of PO:0005645 ! leaf mesophyll [Term] id: PO:0005656 name: secretory tissue namespace: plant_structure 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" [] is_a: PO:0009007 ! tissue [Term] id: PO:0005660 name: hydathode namespace: plant_structure 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 ! secretory tissue is_a: PO:0009015 ! vascular tissue [Term] id: PO:0005661 name: salt gland namespace: plant_structure 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 ! secretory tissue [Term] id: PO:0005665 name: resin canal namespace: plant_structure def: "A duct of schizogenous origin lined with resin-secreting cells and containing resin" [GR:pj, ISBN:0080374913] synonym: "resin duct" [] is_a: PO:0005656 ! secretory tissue [Term] id: PO:0005669 name: oil gland namespace: plant_structure def: "A gland or a cavity lined with cells that secrete oils." [GR:pj] comment: Oil glands are schizogenous. synonym: "oil cavity" [] is_a: PO:0005656 ! secretory tissue [Term] id: PO:0005679 name: epidermis namespace: plant_structure def: "An outermost cell layer of primary tissues of the plant\, sometimes comprised of more than one layer. " [GR:pj, ISBN:0080374913] synonym: "epidermal layer" [] synonym: "multiseriate epidermis" [] is_a: PO:0009014 ! dermal tissue [Term] id: PO:0005702 name: aerenchyma namespace: plant_structure def: "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: "aerenchyma tissue" [] is_a: PO:0005421 ! parenchyma [Term] id: PO:0005704 name: rhexigenous aerenchyma namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Tissue between the vascular system and the epidermis in stem and root. " [GR:pj] is_a: PO:0009007 ! tissue [Term] id: PO:0005752 name: promeristem namespace: plant_structure 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 namespace: plant_structure 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" [] is_a: PO:0005051 ! hypodermis relationship: part_of PO:0000258 ! root cortex [Term] id: PO:0005848 name: secondary xylem namespace: plant_structure def: "The xylem tissue formed by the activity of the vascular cambium." [GR:pj, ISBN:0471245194] comment: It is absent in small dicot annuals and most monocots; the \"wood\" of broad leaf angiosperm tress. is_a: PO:0005352 ! xylem [Term] id: PO:0005849 name: primary xylem namespace: plant_structure def: "The xylem 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) namespace: plant_structure def: "A leaf like structure often found enclosing\nthe 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 namespace: plant_structure def: "A collective term for all the different types of leaves appearing on plants." [ISBN:0080374913] subset: reference is_a: PO:0009008 ! organ relationship: part_of PO:0009006 ! shoot [Term] id: PO:0006002 name: lower glume alt_id: PO:0006027 alt_id: PO:0006031 namespace: plant_structure def: "The proximal/basal of the two glumes." [GR:pj] synonym: "lower empty glume" [] synonym: "lower rudimentary glume" [] synonym: "outer empty glume" [] synonym: "outer glume" [] synonym: "outer rudimentary glume" [] is_a: PO:0009039 ! glume [Term] id: PO:0006003 name: scale leaf namespace: plant_structure 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" [] is_a: PO:0006001 ! phyllome [Term] id: PO:0006004 name: upper glume alt_id: PO:0006028 alt_id: PO:0006030 namespace: plant_structure def: "The apical/distal of the two glumes." [GR:pj] synonym: "inner empty glume" [] synonym: "inner glume" [] synonym: "inner rudimentary glume" [] synonym: "upper empty glume" [] synonym: "upper rudimentary glume" [] is_a: PO:0009039 ! glume [Term] id: PO:0006005 name: carpel anlagen namespace: plant_structure def: "A presumptive region (carpel anlagen) on the floral meristem\, where carpel primordia would initiate." [PMID:14729915] relationship: part_of PO:0000229 ! floral meristem [Term] id: PO:0006006 name: primary parietal cell layer namespace: plant_structure def: "The primary parietal cell and adjacent cells together form this cell layer." [GR:pj, PMID:2476454] subset: reference relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0006007 name: secondary parietal cell layer namespace: plant_structure 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 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "It is formed by the division of the archesporial initial." [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 namespace: plant_structure def: "Unbranched second order vein of the grass leaf blade." [GR:pj] is_a: PO:0020140 ! secondary vein [Term] id: PO:0006012 name: leaf collar namespace: plant_structure def: "A thin band of intercalary meristematic tissue at the junction of the leaf blade (lamina) and the leaf sheath found in grasses." [GR:pj, ISBN:0080374913] relationship: part_of PO:0009025 ! leaf [Term] id: PO:0006013 name: juice sac namespace: plant_structure 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" [] relationship: part_of PO:0009086 ! endocarp [Term] id: PO:0006014 name: male archesporial cell namespace: plant_structure 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" [] synonym: "male archesporial initial" [] is_a: PO:0009002 ! plant cell relationship: part_of PO:0006089 ! anther primordium [Term] id: PO:0006015 name: female archesporial cell namespace: plant_structure def: "In the majority of flowering plants including Arabidopsis\, 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" [] synonym: "ovule archesporial cell" [] is_a: PO:0009002 ! plant cell relationship: part_of PO:0000018 ! ovule primordium [Term] id: PO:0006016 name: leaf epidermis namespace: plant_structure def: "Epidermal layer of a foliage leaf." [GR:pj] synonym: "foliage leaf epidermis" [] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0009025 ! leaf [Term] id: PO:0006017 name: helobial endosperm namespace: plant_structure def: "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 namespace: plant_structure def: "The epidermal layer of adaxial/upper surface of the leaf." [ISBN:0080374913] synonym: "upper epidermis" [] is_a: PO:0006016 ! leaf epidermis [Term] id: PO:0006019 name: leaf abaxial epidermis namespace: plant_structure def: "The epidermal layer of the abaxial/lower surface of the leaf." [ISBN:0080374913] synonym: "lower epidermis" [] is_a: PO:0006016 ! leaf epidermis [Term] id: PO:0006020 name: lateral root apical meristem alt_id: PO:0003013 namespace: plant_structure def: "Meristem found in the apex of the lateral root." [GR:pj] comment: This is different from root lateral meristem. synonym: "apical meristem of lateral root" [] synonym: "lateral root meristem" [] is_a: PO:0020147 ! root apical meristem relationship: part_of PO:0000027 ! lateral root tip [Term] id: PO:0006021 name: adventitious root apical meristem namespace: plant_structure def: "Apical meristem of the adventitious root." [GR:pj] synonym: "crown root meristem" [] synonym: "seminal root meristem" [] is_a: PO:0020147 ! root apical meristem relationship: part_of PO:0000042 ! shoot borne root [Term] id: PO:0006022 name: bundle sheath extension namespace: plant_structure 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:0009007 ! tissue [Term] id: PO:0006023 name: bundle sheath namespace: plant_structure 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:0009007 ! tissue relationship: part_of PO:0009025 ! leaf [Term] id: PO:0006024 name: parenchyma sheath namespace: plant_structure 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" [] is_a: PO:0006023 ! bundle sheath [Term] id: PO:0006025 name: mestome sheath namespace: plant_structure 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 namespace: plant_structure def: "A long bristle-like appendage found on the tip or back of various parts of the grass spikelet." [APWeb:Glossary] subset: reference relationship: part_of PO:0009037 ! lemma [Term] id: PO:0006033 name: paleal apiculus namespace: plant_structure def: "A short\, abrupt\, flexible point present at the apex of the palea" [GR:pj] subset: reference synonym: "apiculus" [] relationship: part_of PO:0009038 ! palea [Term] id: PO:0006034 name: leaflet margin namespace: plant_structure def: "The margin or edges of the leaflet." [GR:pj] relationship: part_of PO:0020049 ! leaflet [Term] id: PO:0006035 name: shoot epidermis namespace: plant_structure def: "Outer layer of the shoot organs." [GR:pj, ISBN:047124529] comment: Often interrupted by stomata and other structures. The shoot epidermis is different from the root epidermis in its origin\, function and structure. is_a: PO:0005679 ! epidermis [Term] id: PO:0006036 name: root epidermis alt_id: PO:0006037 namespace: plant_structure def: "The outermost primary cell layer of the root." [ISBN:0080374913] comment: The root epidermis is different from the shoot epidermis in its origin\, function and structure. synonym: "epiblem" [] synonym: "rhizodermis" [] is_a: PO:0005679 ! epidermis relationship: part_of PO:0009005 ! root [Term] id: PO:0006039 name: adventitious root epidermis alt_id: PO:0006038 namespace: plant_structure def: "The outer most cell layer of the adventitious root." [GR:pj] synonym: "crown root epidermis" [] is_a: PO:0006036 ! root epidermis relationship: part_of PO:0000042 ! shoot borne root [Term] id: PO:0006040 name: sepal epidermis namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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" [] is_a: PO:0006036 ! root epidermis [Term] id: PO:0006043 name: integument epidermis namespace: plant_structure def: "The epidermis 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "The epidermal layer of the seed coat." [GR:pj] is_a: PO:0005679 ! epidermis relationship: part_of PO:0009088 ! seed coat [Term] id: PO:0006049 name: scutellum epidermis namespace: plant_structure def: "The epidermal layer of the scutellum." [GR:pj] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0020110 ! scutellum [Term] id: PO:0006050 name: exotesta namespace: plant_structure def: "That part of the seed coat that develops from the outer surface of the outer integument." [GR:pj] synonym: "seed coat outer epidermis" [] is_a: PO:0006048 ! seed coat epidermis relationship: part_of PO:0020057 ! testa [Term] id: PO:0006051 name: endotesta namespace: plant_structure def: "That part of the seed coat that develops from the inner epidermis of the outer integument." [GR:pj] synonym: "seed coat inner epidermis" [] is_a: PO:0006048 ! seed coat epidermis relationship: part_of PO:0020057 ! testa [Term] id: PO:0006052 name: petal abaxial epidermis namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "The epidermal cell layer 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "The epidermal cell layer 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 namespace: plant_structure 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 namespace: plant_structure def: "The epidermal cell layer of the style." [GR:pj] synonym: "transmitting tract epidermis" [] is_a: PO:0008043 ! floral epidermis relationship: part_of PO:0009074 ! style [Term] id: PO:0006063 name: ovary epidermis namespace: plant_structure 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 namespace: plant_structure def: "It is the innermost layer of the cortex of hypocotyl." [GR:pj] is_a: PO:0000252 ! endodermis [Term] id: PO:0006066 name: petiole parenchyma namespace: plant_structure 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 namespace: plant_structure 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" [] synonym: "leaf meristem" [] synonym: "ventral meristem" [] is_obsolete: true [Term] id: PO:0006068 name: sepal parenchyma namespace: plant_structure def: "Relatively unspecialized tissue present in the sepals." [GR:pj] is_a: PO:0005421 ! parenchyma [Term] id: PO:0006069 name: petal parenchyma namespace: plant_structure def: "Relatively unspecialized tissue present in the petals." [GR:pj] is_a: PO:0005421 ! parenchyma [Term] id: PO:0006070 name: mesophyll namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Meristematic tissue 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 is_a: PO:0009013 ! meristem [Term] id: PO:0006074 name: procambium namespace: plant_structure def: "A primary cambium which undergoes differentiation to form the primary vascular tissue." [ISBN:0080374913] relationship: part_of PO:0020144 ! apical meristem [Term] id: PO:0006075 name: primary phloem namespace: plant_structure def: "The phloem 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 namespace: plant_structure 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] relationship: part_of PO:0006075 ! primary phloem [Term] id: PO:0006077 name: protophloem namespace: plant_structure def: "The first-formed elements of the primary phloem." [ISBN:0471245194] relationship: part_of PO:0006075 ! primary phloem [Term] id: PO:0006078 name: primary vascular tissue namespace: plant_structure 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 namespace: plant_structure def: "Meristem found in a shoot." [GR:pj] is_a: PO:0009013 ! meristem relationship: part_of PO:0009006 ! shoot [Term] id: PO:0006080 name: secondary vascular tissue namespace: plant_structure 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 namespace: plant_structure def: "Meristem found in the apex of the primary root." [GR:pj] synonym: "apical meristem of primary root" [] synonym: "embryonic root meristem" [] is_a: PO:0020147 ! root apical meristem relationship: part_of PO:0000026 ! primary root tip relationship: part_of PO:0020031 ! radicle [Term] id: PO:0006082 name: abaxial protoderm namespace: plant_structure 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 namespace: plant_structure 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: transfusion tissue namespace: plant_structure 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 ! tissue [Term] id: PO:0006085 name: root meristem alt_id: PO:0003001 namespace: plant_structure def: "Meristem found in a root." [GR:pj] synonym: "meristematic zone" [] is_a: PO:0009013 ! meristem relationship: part_of PO:0009005 ! root [Term] id: PO:0006086 name: accessory transfusion tissue namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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" [] is_a: PO:0000009 ! cultured callus [Term] id: PO:0006091 name: embryogenic callus namespace: plant_structure def: "A type of cultured callus that form embryo-like structures such as somatic embryos." [POC:curators] is_a: PO:0000009 ! cultured callus [Term] id: PO:0006109 name: pith namespace: plant_structure def: "Non-vascular tissue in the center of stem or root" [ISBN:0080280307] is_a: PO:0009007 ! tissue [Term] id: PO:0006200 name: fascicular cambium namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Region located between vascular bundles in the stem. " [ISBN:047124529] comment: Check for the relationship. Inapplicable for nearly all monocots. synonym: "medullary ray" [] synonym: "pith ray" [] is_a: PO:0006109 ! pith relationship: part_of PO:0009047 ! stem [Term] id: PO:0006203 name: pericycle namespace: plant_structure def: "Part of the tissue of the stele located between the phloem and endodermis." [ISBN:047124529] subset: reference is_a: PO:0009007 ! tissue relationship: part_of PO:0020124 ! root stele [Term] id: PO:0006204 name: sporocyte namespace: plant_structure def: "A diploid (2n) cell that undergoes meiosis and produces four haploid (1n) spores." [GR:pj] synonym: "meiocyte" [] is_a: PO:0009002 ! plant cell [Term] id: PO:0006205 name: spongy mesophyll cell namespace: plant_structure 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" [] is_a: PO:0004006 ! mesophyll cell relationship: part_of PO:0005647 ! spongy mesophyll [Term] id: PO:0006206 name: palisade mesophyll cell namespace: plant_structure 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" [] is_a: PO:0004006 ! mesophyll cell relationship: part_of PO:0005648 ! palisade mesophyll [Term] id: PO:0006207 name: exodermal passage cell namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "OBSOLETE. The outer most cell layer of the lateral roots." [GR:pj] is_obsolete: true [Term] id: PO:0006210 name: protoderm namespace: plant_structure def: "The undifferentiated surface cell layer of the primary plant body\, which gives rise to epidermis." [GR:pj, ISBN:047124529] comment: It may or may not arise from independent initials. Some researchers also call it an epidermis in meristematic state. synonym: "Dermatogen cell" [] relationship: part_of PO:0009013 ! meristem [Term] id: PO:0006211 name: separation layer namespace: plant_structure def: "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] relationship: part_of PO:0000146 ! abscission zone [Term] id: PO:0006212 name: protective layer namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Parenchyma tissue containing particularly large intercellular spaces." [GR:pj] is_a: PO:0005702 ! aerenchyma relationship: part_of PO:0009047 ! stem [Term] id: PO:0006215 name: leaf aerenchyma namespace: plant_structure 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 ! leaf [Term] id: PO:0006216 name: internal phloem namespace: plant_structure def: "Primary phloem tissue positioned internal to the primary xylem" [ISBN:0122151704] synonym: "intraxylary phloem" [] is_a: PO:0006075 ! primary phloem [Term] id: PO:0006218 name: exotegmen namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "The central region of the 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:0009089 ! endosperm [Term] id: PO:0006221 name: articulated laticifer cell namespace: plant_structure def: "Latex-containing cells in which the walls between contiguous cells may partly or completely disappear." [ISBN:0471245208, TAIR:ki] synonym: "laticiferous vessel" [] is_a: PO:0009002 ! plant cell relationship: part_of PO:0005006 ! articulated laticifer [Term] id: PO:0006222 name: non-articulated laticifer cell namespace: plant_structure def: "Latex-containing cell that elongates indefinitely and grows intrusively between the walls of meristematic cells." [PMID:11732189] synonym: "simple laticifer" [] is_a: PO:0009002 ! plant cell relationship: part_of PO:0005007 ! non-articulated laticifer [Term] id: PO:0006300 name: obsolete plant structure namespace: 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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) namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Any branch forming from the primary or first order inflorescence branch." [GR:pj] synonym: "primary branch" [] is_a: PO:0009081 ! inflorescence branch [Term] id: PO:0006322 name: third order inflorescence branch namespace: plant_structure def: "Any branch forming from the second order inflorescence branch." [GR:pj] synonym: "secondary inflorescence branch" [] is_a: PO:0009081 ! inflorescence branch [Term] id: PO:0006323 name: tassel branch namespace: plant_structure 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 namespace: plant_structure def: "The inflorescence axis of the tassel." [GR:pj] synonym: "tassel rachis" [] is_a: PO:0020122 ! inflorescence axis relationship: part_of PO:0020126 ! tassel [Term] id: PO:0006325 name: inflorescence node namespace: plant_structure def: "The region of the inflorescence axis where the spikelet\, flower\, floret or the 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 namespace: plant_structure def: "The region of rachis present between the two nodes." [GR:pj] is_a: PO:0005005 ! shoot internode relationship: part_of PO:0020122 ! inflorescence axis [Term] id: PO:0006327 name: spikelet meristem namespace: plant_structure def: "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 namespace: plant_structure 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 relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0006329 name: floret meristem (sensu Poaceae) namespace: plant_structure 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 namespace: plant_structure def: "The stalk at the base of the ovary." [Poc:curators] comment: Typically receptacular in origin. subset: reference relationship: part_of PO:0009062 ! gynoecium [Term] id: PO:0006331 name: seed raphe namespace: plant_structure 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 namespace: plant_structure def: "Remnants of the funicle from 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 namespace: plant_structure def: "Remnant of the ovular chalaza which is a region in the ovule where the integuments and the nucellus merge with the funiculus. " [GR:pj] relationship: develops_from PO:0020026 ! chalaza relationship: part_of PO:0009010 ! seed [Term] id: PO:0006334 name: seed micropyle namespace: plant_structure 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 namespace: plant_structure 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] relationship: develops_from PO:0020029 ! obturator relationship: part_of PO:0006332 ! seed funicle [Term] id: PO:0006337 name: inflorescence bract of ear namespace: plant_structure def: "The leaf subtending an ear of corn and acting as outer envelope of the ear." [GR:pj] synonym: "corn husk" [] synonym: "husk" [] synonym: "husk leaf" [] is_a: PO:0009054 ! inflorescence bract relationship: part_of PO:0020136 ! ear (sensu Zea) [Term] id: PO:0006338 name: embryonic leaf namespace: plant_structure def: "The first few leaves developing from the embryonic shoot apical meristem." [GR:pj] is_a: PO:0009025 ! leaf relationship: part_of PO:0009009 ! embryo [Term] id: PO:0006339 name: juvenile leaf namespace: plant_structure 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 ! leaf [Term] id: PO:0006340 name: adult leaf namespace: plant_structure 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 ! leaf [Term] id: PO:0006341 name: primary shoot namespace: plant_structure def: "The shoot developing from the embryonic shoot apical meristem." [UMSL:fz] synonym: "main stalk" [] is_a: PO:0009006 ! shoot [Term] id: PO:0006342 name: infructescence namespace: plant_structure def: "The grouping or arrangement in which fruits are borne on a plant." [GR:pj] relationship: part_of PO:0009003 ! sporophyte [Term] id: PO:0006343 name: axillary shoot namespace: plant_structure def: "The shoot developing from the axillary bud meristem." [GR:pj] synonym: "axillary branch" [] is_a: PO:0004545 ! shoot borne shoot [Term] id: PO:0006344 name: shoot lateral meristem namespace: plant_structure def: "Meristem of the shoot 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 namespace: plant_structure 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 namespace: plant_structure def: "The meristematic tissue 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 ! leaf [Term] id: PO:0006347 name: stem intercalary meristem namespace: plant_structure def: "Meristematic tissue 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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) namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Meristem at the apex of the embryonic axis." [GR:pj] is_a: PO:0008016 ! vegatative shoot apical meristem relationship: part_of PO:0019018 ! embryo axis [Term] id: PO:0006363 name: lemma of ear floret namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Apical shoot 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 namespace: plant_structure def: "Apical shoot 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 namespace: plant_structure 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 namespace: plant_structure def: "Apical meristem that gives rise to the upper and lower florets of the maize ear spikelets." [GR:pj] subset: Maize is_a: PO:0006327 ! spikelet meristem is_a: PO:0009109 ! ear meristem relationship: part_of PO:0020136 ! ear (sensu Zea) [Term] id: PO:0006379 name: tassel spikelet rachilla namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Collectively the stamens of upper floret of a pedicellate spikelet of tassel inflorescence of maize. " [GR:pj] comment: This consitutes 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 namespace: plant_structure def: "Collectively the stamens of lower floret of a pedicellate spikelet of tassel inflorescence of maize." [GR:pj] comment: This consitutes 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "The stalk of a maize ear below the lowest ear node." [GR:pj] synonym: "lateral branch (sensu Zea)" [] synonym: "shank" [] 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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 namespace: plant_structure def: "The style of a maize floret." [GR:pj] synonym: "style (sensu Zea)" [] is_a: PO:0006469 ! style (sensu Poaceae) relationship: part_of PO:0006470 ! carpel (sensu Zea) [Term] id: PO:0006489 name: funicle (sensu Zea) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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 ! transmitting tissue relationship: part_of PO:0006469 ! style (sensu Poaceae) [Term] id: PO:0006500 name: ovary epidermis (sensu Poaceae) namespace: plant_structure 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 namespace: plant_structure 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 ! leaf [Term] id: PO:0006502 name: flower abscission zone namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "The inflorescence axis of the ear." [GR:pj] synonym: "cob (sensu zea)" [] synonym: "ear rachis" [] is_a: PO:0020122 ! inflorescence axis relationship: part_of PO:0020136 ! ear (sensu Zea) [Term] id: PO:0006506 name: chalaza (sensu Zea) namespace: plant_structure 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) namespace: plant_structure 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) namespace: plant_structure 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 namespace: plant_structure def: "The end distal from the fruit pedicel." [(SGN:nm), GR:ap] subset: Tomato synonym: "blossom end" [] relationship: part_of PO:0009001 ! fruit [Term] id: PO:0008002 name: fruit proximal end namespace: plant_structure def: "The stem end of the fruit." [(SGN:nm), GR:ap] subset: Tomato synonym: "fruit shoulders" [] relationship: part_of PO:0009001 ! fruit [Term] id: PO:0008003 name: fruit vascular system namespace: plant_structure 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 namespace: plant_structure def: "The outermost endosperm tissue of the grass caryopsis\, its cells being characterized by presence of protein bodies containing seed storage proteins." [GR:ap] relationship: part_of PO:0009001 ! fruit [Term] id: PO:0008005 name: fruit nucellus namespace: plant_structure def: "Subepidermal tissue in the grass caryopsis." [GR:ap] subset: Poaceae subset: Rice relationship: part_of PO:0009001 ! fruit [Term] id: PO:0008006 name: nucellar epidermis namespace: plant_structure def: "The morphologically distinct outer layer of the nucellus. " [GR:ap] subset: Poaceae subset: Rice relationship: part_of PO:0008005 ! fruit nucellus [Term] id: PO:0008007 name: nucellar projection namespace: plant_structure def: "The morphologically distinct portion of the nucellus overlying the vascular strands in the grass caryopsis." [GR:ap] subset: Poaceae subset: Rice relationship: part_of PO:0008005 ! fruit nucellus [Term] id: PO:0008008 name: modified aleurone namespace: plant_structure def: "The morphologically distinct aleurone layer located adjacent to the nucellar projection." [GR:ap] subset: Poaceae subset: Rice relationship: part_of PO:0008004 ! fruit aleurone layer [Term] id: PO:0008009 name: abaxial nucellar projection namespace: plant_structure def: "The abaxial/lower portion of the nucellus overlying the vascular strands in the grass caryopsis." [GR:ap] subset: Poaceae subset: Rice relationship: part_of PO:0008007 ! nucellar projection [Term] id: PO:0008010 name: adaxial nucellar projection namespace: plant_structure def: "The adaxial/upper portion of the nucellus overlying the vascular strands in the grass caryopsis." [GR:ap] subset: Poaceae subset: Rice relationship: part_of PO:0008007 ! nucellar projection [Term] id: PO:0008011 name: embryo vascular system namespace: plant_structure 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 namespace: plant_structure def: "Vascular system of stigma" [GR:cwt] synonym: "stigma vein" [] is_a: PO:0005017 ! flower vascular system relationship: part_of PO:0005019 ! carpel vascular system [Term] id: PO:0008013 name: anther vascular system namespace: plant_structure 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 namespace: plant_structure def: "Vascular system of filament in the stamen" [GR:cwt] synonym: "filament vein" [] is_a: PO:0005017 ! flower vascular system relationship: part_of PO:0005018 ! stamen vascular system [Term] id: PO:0008015 name: hypocotyl vascular system namespace: plant_structure 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: vegatative shoot apical meristem namespace: plant_structure def: "the meristem which gives rise to the apical growth of vegetative tissues and organs.\n" [GR:cwt] synonym: "vegetative meristem" [] is_a: PO:0020148 ! shoot apical meristem [Term] id: PO:0008017 name: leaf sheath pulvinus namespace: plant_structure 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 namespace: plant_structure 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 ! leaf [Term] id: PO:0008019 name: leaf lamina base namespace: plant_structure def: "The region of the leaf lamina proximal to the stem and usually connected to it by means of a petiole. " [GR:cwt] relationship: part_of PO:0020039 ! leaf lamina [Term] id: PO:0008020 name: central zone of the leaf lamina namespace: plant_structure 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] relationship: part_of PO:0020039 ! leaf lamina [Term] id: PO:0008021 name: tertiary vein namespace: plant_structure def: "The leaf vein arising from the secondary vein" [GR:cwt] synonym: "third order leaf vein" [] relationship: develops_from PO:0020140 ! secondary vein [Term] id: PO:0008022 name: quaternary vein namespace: plant_structure def: "The leaf vein arising from the tertiary vein" [GR:cwt] synonym: "fourth order leaf vein" [] relationship: develops_from PO:0008021 ! tertiary vein [Term] id: PO:0008023 name: higher order vein namespace: plant_structure def: "The leaf vein arising from the quaternary or higher vein order" [GR:cwt] synonym: "fifth and higher order leaf vein" [] relationship: develops_from PO:0008022 ! quaternary vein [Term] id: PO:0008024 name: petiole proximal end namespace: plant_structure def: "The region of the petiole proximal to its stem attachment site." [GR:cwt] synonym: "petiole base" [] relationship: part_of PO:0020038 ! petiole [Term] id: PO:0008025 name: central zone of the petiole namespace: plant_structure def: "Regions of the petiole that does not include petiole distal end and petiole proximal end." [GR:cwt] relationship: part_of PO:0020038 ! petiole [Term] id: PO:0008026 name: petiole distal end namespace: plant_structure def: "The region of the petiole distal to its stem attachment site or proximal to the leaf lamina." [GR:cwt] synonym: "petiole apex" [] relationship: part_of PO:0020038 ! petiole [Term] id: PO:0008027 name: petiole adaxial epidermis namespace: plant_structure def: "The epidermal layer of adaxial/upper surface of the petiole" [GR:cwt] relationship: part_of PO:0000051 ! petiole epidermis [Term] id: PO:0008028 name: reproductive shoot apical meristem namespace: plant_structure def: "the meristem which gives rise to the apical growth of reproductive tissues and organs.\n" [GR:cwt] is_a: PO:0020148 ! shoot apical meristem [Term] id: PO:0008029 name: petiole abaxial epidermis namespace: plant_structure def: "The epidermal layer of the abaxial/lower surface of the petiole" [GR:cwt] relationship: part_of PO:0000051 ! petiole epidermis [Term] id: PO:0008030 name: trichome cell namespace: plant_structure def: "Each cell which is part of a trichome" [GR:cwt] relationship: part_of PO:0000282 ! trichome [Term] id: PO:0008031 name: trichome branch namespace: plant_structure def: "The branch on a trichome" [GR:cwt] relationship: part_of PO:0000282 ! trichome [Term] id: PO:0008032 name: stomatal pore namespace: plant_structure def: "The space of variable size controlled by stomatal guard cells in response to environmental clues. " [GR:cwt] synonym: "stomatal aperture" [] relationship: part_of PO:0002000 ! stomatal complex [Term] id: PO:0008033 name: phyllome whorl namespace: plant_structure def: "a circular arrangement of phyllome" [GR:cwt] is_a: PO:0006001 ! phyllome [Term] id: PO:0008034 name: leaf whorl namespace: plant_structure def: "A cluster of leaves in crowded circles or spirals arising basally from a crown" [GR:cwt] synonym: "rosette" [] is_a: PO:0008033 ! phyllome whorl [Term] id: PO:0008035 name: plerome namespace: plant_structure def: "The 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 namespace: plant_structure def: "The meristem forming the cortex" [ISBN:0471245208 "Anatomy of seed plants by K. Esau \[2nd edition\]"] is_a: PO:0009013 ! meristem [Term] id: PO:0008037 name: seedling namespace: plant_structure def: "A young plant derived from a newly germinated seed" [GR:cwt] relationship: develops_from PO:0009009 ! embryo [Term] id: PO:0008038 name: adventitious root primordium namespace: plant_structure 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 namespace: plant_structure def: "The basal part of stem" [GR:cwt] relationship: part_of PO:0009047 ! stem [Term] id: PO:0008040 name: lodicule primordium namespace: plant_structure def: "The primordium will differentiat into lodicule" [GR:cwt] is_a: PO:0009036 ! lodicule [Term] id: PO:0008041 name: stem internode elongation zone namespace: plant_structure def: "Zone of pronounced cell elongation in stem internode" [GR:cwt "PMID\:14520573"] relationship: part_of PO:0020142 ! stem internode [Term] id: PO:0008042 name: stem internode differentiation zone namespace: plant_structure def: "Region in stem internode where cells are becoming specialzed to form cortex\,\, endodermis or\, vascular tissue" [GR:cwt "PMID\:14520573"] relationship: part_of PO:0020142 ! stem internode [Term] id: PO:0008043 name: floral epidermis namespace: plant_structure def: "Epidermal layer 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 namespace: plant_structure 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 namespace: plant_structure def: "One of a pair of cells flanking the stomatal pore of floral organs" [GR:cwt] relationship: part_of PO:0008044 ! floral stomatal complex [Term] id: PO:0008046 name: floral stomatal pore namespace: plant_structure 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 namespace: plant_structure def: "The vascular system in scutellum" [GR:cwt] synonym: "scutellum vascular system" [] relationship: part_of PO:0008011 ! embryo vascular system relationship: part_of PO:0020110 ! scutellum [Term] id: PO:0008048 name: scutellar epithelium namespace: plant_structure 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" [] relationship: part_of PO:0020110 ! scutellum [Term] id: PO:0009000 name: pulvinus namespace: plant_structure def: " A more or less abrupt swelling\, especially at the apex or base of a petiole or leaf sheath\, often glandular and/or being the place where a plant responds 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.\, cf. articulation.\n" [APWeb:Glossary] is_a: PO:0009008 ! organ [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 namespace: plant_structure def: "The seed-bearing structure in angiosperms\, formed from the ovary after flowering." [APWeb:Glossary, Poc:curators] subset: Arabidopsis subset: Maize subset: Poaceae subset: Rice synonym: "achene" [] synonym: "berry" [] synonym: "capsule" [] synonym: "caryopsis" [] synonym: "circumcissile capsule" [] synonym: "cypsela" [] synonym: "drupe" [] synonym: "follicle" [] synonym: "grain" [] synonym: "kernel" [] synonym: "legume" [] synonym: "loculicidal capsule" [] synonym: "lomentum" [] synonym: "nut" [] synonym: "pod" [] synonym: "pome" [] synonym: "poricidal capsule" [] synonym: "schizocarp" [] synonym: "septicidal capsule" [] synonym: "septifragal capsule" [] synonym: "silicula" [] synonym: "siliqua" [] synonym: "silique" [] relationship: part_of PO:0006342 ! infructescence [Term] id: PO:0009002 name: plant cell namespace: plant_structure def: "Structural and physiological unit of a plant consisting of the cytoplasm\, protoplast and cell wall; in nonliving state\, of cell wall only\, or cell wall and some nonliving inclusions." [GR:pj, ISBN:0471245208] subset: reference xref_analog: CL:0000610 is_a: PO:0009011 ! plant structure [Term] id: PO:0009003 name: sporophyte namespace: plant_structure def: "A plant or phase of a life cycle that bears spores formed by meiosis." [APWeb:Glossary] subset: reference is_a: PO:0009011 ! plant structure [Term] id: PO:0009004 name: gametophyte namespace: plant_structure def: "A haploid plant\, or phase of a plant's life cycle\, that bears gametes after mitotic events." [APWeb:Glossary] subset: reference is_a: PO:0009011 ! plant structure [Term] id: PO:0009005 name: root alt_id: PO:0003006 namespace: plant_structure def: "An axial system which is usually underground and more or less positively geotropic\, does not bear leaves and only rarely shoots\, is endogenous in origin\, indeterminate in growth and often with secondary thickening." [APWeb:Glossary] comment: Commonly thought of as one of the three basic parts of the seed plant body. subset: reference synonym: "aerial root" [] is_a: PO:0009008 ! organ relationship: part_of PO:0009003 ! sporophyte [Term] id: PO:0009006 name: shoot namespace: plant_structure def: "Part of the sporophyte composed of the stems and leaves\, and includes shoot apical meristems." [Poc:curators] subset: reference synonym: "branch" [] synonym: "crown (sensu Poaceae)" [] narrow_synonym: "tree crown" [] relationship: part_of PO:0009003 ! sporophyte [Term] id: PO:0009007 name: tissue namespace: plant_structure def: "Group of cells organized into a structural and functional unit; the component cells may be alike (simple tissue) or varied (complex tissue)." [TAIR:lr] subset: reference is_a: PO:0009011 ! plant structure [Term] id: PO:0009008 name: organ namespace: plant_structure def: "A natural part or structure in a plant\, capable of performing some special action (termed its function)\, which is essential to the life or well-being of the whole." [MaizeGDB:lv] comment: All organs are represented under sporophyte. subset: reference is_a: PO:0009011 ! plant structure [Term] id: PO:0009009 name: embryo namespace: plant_structure def: "A young sporophyte contained within a seed." [APWeb:Glossary, GR:pj] synonym: "germ" [] relationship: part_of PO:0009010 ! seed [Term] id: PO:0009010 name: seed namespace: plant_structure 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:0009003 ! sporophyte relationship: part_of PO:0009001 ! fruit [Term] id: PO:0009011 name: plant structure namespace: plant_structure def: "Any morphological or anatomical feature of a plant." [Poc:curators] [Term] id: PO:0009013 name: meristem namespace: plant_structure def: "Regions of a plant in which cells that 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" [] is_a: PO:0009007 ! tissue [Term] id: PO:0009014 name: dermal tissue namespace: plant_structure def: "Tissue derived from the protoderm that covers the surface of the plant body." [GR:pj, ISBN:0122151704] is_a: PO:0009007 ! tissue [Term] id: PO:0009015 name: vascular tissue namespace: plant_structure def: "Conducting tissues made up of xylem and phloem." [APWeb:Glossary] comment: In the stem it is often found as a stele\, surrounded by the cortex and surrounding the pith. is_a: PO:0009007 ! tissue relationship: part_of PO:0005020 ! vascular bundle [Term] id: PO:0009016 name: ground tissue namespace: plant_structure 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 namespace: plant_structure def: "Pulvinus of 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 namespace: plant_structure def: "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 namespace: plant_structure def: "the 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 namespace: plant_structure def: "The outermost layer of the shoot apical meristem which gives rise to the shoot epidermis." [GR:pj, PMID:12221985] relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0009021 name: meristem L2 namespace: plant_structure def: "The cell layer beneath the L1 layer in the shoot meristem which gives rise to subepidermal tissue." [GR:pj, PMID:12221985] relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0009022 name: meristem L3 namespace: plant_structure def: "The multicellular layer beneath the L2 layer in the shoot meristem which gives rise to internal tissues of leaf and stem." [GR:pj, PMID:12221985] relationship: part_of PO:0020148 ! shoot apical meristem [Term] id: PO:0009023 name: leaf axil namespace: plant_structure def: "The angle between the petiole of a leaf and the stem to which it is attached.\n" [GR:cwt] relationship: part_of PO:0020040 ! leaf base [Term] id: PO:0009024 name: stylar ridge of lower floret of pedicellate spikelet of ear namespace: plant_structure relationship: part_of PO:0006424 ! gynoecium of lower floret of pedicellate spikelet of ear [Term] id: PO:0009025 name: leaf namespace: plant_structure def: "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] subset: reference synonym: "foliage leaf" [] is_a: PO:0006001 ! phyllome [Term] id: PO:0009026 name: sporophyll namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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).\n" [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 namespace: plant_structure 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:0009008 ! organ relationship: part_of PO:0009060 ! calyx [Term] id: PO:0009032 name: petal namespace: plant_structure 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:0009008 ! organ relationship: part_of PO:0009059 ! corolla [Term] id: PO:0009033 name: tepal namespace: plant_structure def: "A perianth segment in a flower in which there are two whorls of such segments\, but all are similar in appearance." [APWeb:Glossary] subset: reference relationship: part_of PO:0009058 ! perianth [Term] id: PO:0009034 name: floral bract namespace: plant_structure def: "Leaf like structure subtending a flower." [Poc:curators] subset: reference synonym: "chaff" [] is_a: PO:0009008 ! organ is_a: PO:0009055 ! bract relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009035 name: nectary namespace: plant_structure def: "A multicellular glandular structure secreting a liquid containing organic substances especially sugars." [GR:pj] subset: reference is_a: PO:0005656 ! secretory tissue relationship: part_of PO:0009006 ! shoot [Term] id: PO:0009036 name: lodicule namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A \"bract\" in the inflorescence of a grass\, sedge or similar plant." [APWeb:Glossary, GR:pj] subset: reference synonym: "rudimentary glume" [] is_a: PO:0009054 ! inflorescence bract relationship: part_of PO:0009051 ! spikelet [Term] id: PO:0009040 name: sterile lemma alt_id: PO:0006029 namespace: plant_structure 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" [] is_a: PO:0009037 ! lemma [Term] id: PO:0009041 name: fertile lemma namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Equals inflorescence bract of an involucre\, as in Asteraceae or Compositeae." [APWeb:Glossary] subset: reference synonym: "phyllary" [] is_a: PO:0009054 ! inflorescence bract relationship: part_of PO:0009100 ! involucre [Term] id: PO:0009046 name: flower alt_id: PO:0004541 namespace: plant_structure def: "A heterosporangiate strobilus\, typically consisting of androecium\, gynoecium\, usually surrounded by a perianth and borne on an axis or receptacle." [APWeb:Glossary, GR:pj] comment: The characteristic reproductive structure of angiosperms. subset: reference synonym: "floret (sensu Asteraceae)" [] relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009047 name: stem namespace: plant_structure def: "The axial system of plants that bears leaves and buds.\n" [APWeb:Glossary] comment: It is usually above ground and more or less negatively geotropic\, is exogenous in origin\, often indeterminate in growth and with secondary thickening. subset: reference synonym: "cane" [] synonym: "culm" [] synonym: "stalk" [] synonym: "trunk" [] relationship: part_of PO:0009006 ! shoot [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 namespace: plant_structure 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" [] synonym: "catkin" [] synonym: "cob (sensu Sorghum)" [] synonym: "corymb" [] synonym: "cyme" [] synonym: "dichasium" [] synonym: "drepanium" [] synonym: "helicoid cyme" [] synonym: "monochasium" [] synonym: "panicle" [] synonym: "raceme" [] synonym: "rhipidium" [] synonym: "scorpioid cyme" [] synonym: "spike (sensu Triticeae)" [] synonym: "umbel" [] synonym: "verticillaster" [] relationship: part_of PO:0009006 ! shoot [Term] id: PO:0009051 name: spikelet namespace: plant_structure 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: reference relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009052 name: pedicel namespace: plant_structure def: "Basal part of the ultimate branch of the inflorescence." [APWeb:Glossary] comment: The bracteoles are borne on the pedicel\, which terminates in a flower. subset: reference relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009053 name: peduncle namespace: plant_structure def: "The stalk of an inflorescence; that part of the inflorescence below the first flower or inflorescence branch and above the last foliage leaf/pair of foliage leaves." [APWeb:Glossary] subset: reference synonym: "inflorescence stem " [] relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009054 name: inflorescence bract namespace: plant_structure def: "A leaf\, modified or not\, subtending a branch of the inflorescence or borne on the inflorescence axis below any branches or flowers." [APWeb:Glossary] subset: reference is_a: PO:0009008 ! organ is_a: PO:0009055 ! bract relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009055 name: bract namespace: plant_structure def: "A leaf\, usually different in form from the foliage leaves\, subtending a flower or inflorescence." [APWeb:Glossary] comment: Often used to refer to what is called here floral bract. subset: reference synonym: "hypsophyll" [] is_a: PO:0006001 ! phyllome [Term] id: PO:0009056 name: floral nectary namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "Non-fertile parts of a flower surrounding the fertile organs\, collectively the calyx and corolla of a flower\, or only a singe whorl." [APWeb:Glossary] subset: reference relationship: part_of PO:0009046 ! flower [Term] id: PO:0009059 name: corolla namespace: plant_structure def: "The petals of a flower collectively." [APWeb:Glossary] subset: reference relationship: part_of PO:0009058 ! perianth [Term] id: PO:0009060 name: calyx namespace: plant_structure def: "The sepals of one flower collectively." [APWeb:Glossary] subset: reference relationship: part_of PO:0009058 ! perianth [Term] id: PO:0009061 name: androecium namespace: plant_structure def: "Collectively the stamens of one flower." [APWeb:Glossary, GR:pj] subset: reference relationship: part_of PO:0009046 ! flower [Term] id: PO:0009062 name: gynoecium namespace: plant_structure def: "Collectively the carpels of a flower." [APWeb:Glossary, GR:pj, MaizeGDB:lv, TAIR:lr] subset: reference synonym: "pistil" [] relationship: part_of PO:0009046 ! flower [Term] id: PO:0009063 name: epicalyx namespace: plant_structure def: "A whorl of structures immediately outside the calyx whorl." [APWeb:Glossary] subset: reference relationship: part_of PO:0009046 ! flower [Term] id: PO:0009064 name: receptacle namespace: plant_structure def: "The region at end of pedicel or axis to which parts of flower are attached." [APWeb:Glossary, Poc:curators] subset: reference relationship: part_of PO:0009046 ! flower [Term] id: PO:0009065 name: hypanthium namespace: plant_structure def: "A cup- or tube-like structure bearing perianth and stamens on its rim\, so these arise above the base\, and often above the top\, of the ovary of a flower." [APWeb:Glossary, Poc:curators] subset: reference relationship: part_of PO:0009046 ! flower [Term] id: PO:0009066 name: anther namespace: plant_structure def: "The pollen-bearing part of a stamen." [APWeb:Glossary] subset: reference relationship: part_of PO:0009029 ! stamen [Term] id: PO:0009067 name: filament namespace: plant_structure def: "The stalk of a stamen." [GR:pj, MaizeGDB:lv] subset: reference relationship: part_of PO:0009029 ! stamen [Term] id: PO:0009068 name: connective namespace: plant_structure def: "The part of the stamen that connects the microsporangia/pollen sacs." [APWeb:Glossary] subset: reference relationship: part_of PO:0009066 ! anther [Term] id: PO:0009069 name: theca namespace: plant_structure 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 namespace: plant_structure def: "Sporangium producing microspores\, usually many in number." [APWeb:Glossary] subset: reference synonym: "anther lobe" [] synonym: "pollen sac" [] relationship: part_of PO:0009066 ! anther [Term] id: PO:0009071 name: tapetum namespace: plant_structure def: "Innermost part of the anther wall\, involved in the nutrition of the pollen." [APWeb:Glossary, TAIR:lr] subset: reference relationship: develops_from PO:0006008 ! inner secondary parietal cell layer relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0009072 name: ovary namespace: plant_structure def: "The basal portion of a carpel or group of fused carpels\, that encloses the ovule(s)." [APWeb:Glossary, TAIR:lr] subset: reference relationship: part_of PO:0009030 ! carpel [Term] id: PO:0009073 name: stigma namespace: plant_structure def: "Part of a carpel or group of fused carpels on which the pollen germinates\, usually apical." [APWeb:Glossary, TAIR:lr] subset: reference relationship: part_of PO:0009030 ! carpel [Term] id: PO:0009074 name: style namespace: plant_structure 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" [] relationship: part_of PO:0009030 ! carpel [Term] id: PO:0009075 name: plant ontology namespace: plant_structure 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 namespace: plant_structure relationship: part_of PO:0006423 ! gynoecium of lower floret of sessile spikelet of ear [Term] id: PO:0009077 name: staminode namespace: plant_structure def: "Sterile stamen." [APWeb:Glossary, GR:pj] is_a: PO:0009028 ! microsporophyll relationship: part_of PO:0009061 ! androecium [Term] id: PO:0009078 name: pistillode namespace: plant_structure 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 namespace: plant_structure relationship: part_of PO:0006426 ! gynoecium of upper floret of pedicellate spikelet of ear [Term] id: PO:0009080 name: spikelet rachilla namespace: plant_structure 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 namespace: plant_structure def: "Any branch forming from the primary or the higher order inflorescence axis." [Poc:curators] synonym: "coflorescence" [] relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009082 name: floret namespace: plant_structure def: "Small flowers\, esp. of the spikelets of Poaceae and Cyperaceae." [APWeb:Glossary] subset: reference is_a: PO:0009046 ! flower [Term] id: PO:0009083 name: reproductive structures namespace: plant_structure def: "OBSOLETE. Aggregation of gamete producing structures." [Poc:curators] is_obsolete: true [Term] id: PO:0009084 name: pericarp namespace: plant_structure def: "The 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" [] synonym: "fruit rind" [] relationship: part_of PO:0009001 ! fruit [Term] id: PO:0009085 name: epicarp alt_id: PO:0006046 alt_id: PO:0006217 namespace: plant_structure def: "The outer layer of the fruit wall or pericarp." [GR:pj] subset: Citrus subset: Tomato synonym: "ectocarp" [] synonym: "epicarp" [] synonym: "exocarp" [] synonym: "flavedo" [] synonym: "outer epidermis of pericarp" [] synonym: "pericarp epidermis" [] relationship: part_of PO:0009084 ! pericarp [Term] id: PO:0009086 name: endocarp alt_id: PO:0006047 namespace: plant_structure def: "The innermost differentiated layer of the fruit wall or pericarp." [GR:pj] subset: Arabidopsis subset: Citrus subset: Maize subset: Poaceae subset: Rice subset: Tomato synonym: "endocarp" [] synonym: "flesh (sensu Citrus)" [] synonym: "inner epidermis of pericarp" [] synonym: "pulp (sensu Citrus)" [] relationship: part_of PO:0009084 ! pericarp [Term] id: PO:0009087 name: mesocarp namespace: plant_structure def: "Middle layer of the fruit wall or pericarp." [GR:pj] subset: Citrus subset: Tomato synonym: "albedo" [] relationship: part_of PO:0009084 ! pericarp [Term] id: PO:0009088 name: seed coat namespace: plant_structure def: "Covering of seed derived from ovular - mainly integumentary - tissue." [APWeb:Glossary, GR:pj, TAIR:lr] comment: Used only when not specified more precisely; see testa\, tegmen. relationship: part_of PO:0009010 ! seed [Term] id: PO:0009089 name: endosperm namespace: plant_structure def: "Nutritive tissue in a seed\, in angiosperms usually triploid and formed after fertilization by the fusion of one gamete with the polar nucleus\, sometimes diploid or polyploid. " [APWeb:Glossary, GR:pj] is_a: PO:0009007 ! tissue relationship: part_of PO:0009010 ! seed [Term] id: PO:0009090 name: aril namespace: plant_structure 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 namespace: plant_structure def: "OBSOLETE. provisional term" [Poc:curators] is_obsolete: true [Term] id: PO:0009092 name: stylar ridge of upper floret of sessile spikelet of ear namespace: plant_structure relationship: part_of PO:0006425 ! gynoecium of upper floret of sessile spikelet of ear [Term] id: PO:0009100 name: involucre namespace: plant_structure def: "A whorl of 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. relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0009101 name: long lateral tassel branch namespace: plant_structure def: "The long branch that arise from the central spike of tassel in maize." [MaizeGDB:lv, GR:pj] subset: Maize synonym: "second order tassel branch" [] is_a: PO:0006323 ! tassel branch relationship: develops_from PO:0009104 ! long lateral tassel branch meristem [Term] id: PO:0009102 name: short tassel branch namespace: plant_structure def: "The very short branch that may arise from either or both the long lateral branch and the central spike of tassel in maize." [MaizeGDB:lv, GR:pj] subset: Maize synonym: "third order tassel branch" [] is_a: PO:0006323 ! tassel branch relationship: develops_from PO:0009103 ! short tassel branch meristem [Term] id: PO:0009103 name: short tassel branch meristem namespace: plant_structure 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." [MaizeGDB:lv, GR:pj] subset: Maize synonym: "short branch meristem" [] synonym: "third order tassel branch meristem" [] 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 namespace: plant_structure def: "The meristem that gives rise to the long lateral branch in the maize tassel." [MaizeGDB:lv] subset: Maize synonym: "long lateral branch meristem" [] synonym: "second order tassel branch meristem" [] is_a: PO:0009107 ! tassel lateral meristem relationship: part_of PO:0006324 ! central spike of tassel [Term] id: PO:0009105 name: inflorescence lateral meristem namespace: plant_structure def: "The meristem which gives rise to the lateral structures of the inflorescence and contributes to their apical growth." [MaizeGDB:lv, GR:pj] is_a: PO:0000230 ! inflorescence meristem is_a: PO:0006344 ! shoot lateral meristem [Term] id: PO:0009106 name: tassel meristem namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "The meristem which 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." [MaizeGDB:lv, GR:pj] is_a: PO:0000230 ! inflorescence meristem is_a: PO:0008028 ! reproductive shoot apical meristem relationship: develops_from PO:0008016 ! vegatative shoot apical meristem [Term] id: PO:0009109 name: ear meristem namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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" [] relationship: part_of PO:0008037 ! seedling [Term] id: PO:0019022 name: arilloid namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A plug-like structure formed in the micropylar region of the seed coat." [ISBN:0080280293] relationship: part_of PO:0009010 ! seed [Term] id: PO:0019026 name: tracheid bar namespace: plant_structure 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] relationship: part_of PO:0009010 ! seed [Term] id: PO:0020001 name: ovary placenta namespace: plant_structure def: "A more or less localized region within an ovary to which ovules are attached." [APWeb:Glossary] subset: reference relationship: part_of PO:0009072 ! ovary [Term] id: PO:0020002 name: endothecium namespace: plant_structure def: "The 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" [] 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 namespace: plant_structure 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 relationship: part_of PO:0009072 ! ovary [Term] id: PO:0020004 name: exothecium alt_id: PO:0006059 namespace: plant_structure 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" [] synonym: "anther sac epidermis" [] is_a: PO:0006035 ! shoot epidermis relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0020005 name: placentoid namespace: plant_structure def: "An inpushing of the anther wall." [APWeb:Glossary] subset: reference relationship: part_of PO:0000002 ! anther wall [Term] id: PO:0020006 name: funicle namespace: plant_structure def: "The stalk which attaches the ovule to the placenta." [APWeb:Glossary, GR:pj] subset: reference synonym: "funiculus" [] relationship: part_of PO:0009072 ! ovary [Term] id: PO:0020008 name: exine namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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" [] is_obsolete: true [Term] id: PO:0020014 name: columella namespace: plant_structure 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" [] is_obsolete: true [Term] id: PO:0020015 name: sculpture elements namespace: plant_structure 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" [] is_obsolete: true [Term] id: PO:0020016 name: foot layer namespace: plant_structure 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" [] is_obsolete: true [Term] id: PO:0020017 name: intine namespace: plant_structure 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 namespace: plant_structure 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" [] is_obsolete: true [Term] id: PO:0020019 name: megaspore namespace: plant_structure 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_analog: CL:0000250 is_a: PO:0009002 ! plant cell relationship: develops_from PO:0000431 ! megasporocyte [Term] id: PO:0020020 name: nucellus namespace: plant_structure def: "Subepidermal tissue in the ovule surrounding the megasporocyte." [APWeb:Glossary] subset: reference synonym: "megasporangium" [] relationship: part_of PO:0020003 ! ovule [Term] id: PO:0020021 name: integument namespace: plant_structure def: "One of the layers of tissue that usually covers the ovule\, enveloping the nucellus and forming the micropyle at the apex." [APWeb:Glossary] subset: reference relationship: part_of PO:0020003 ! ovule [Term] id: PO:0020022 name: inner integument namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure 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] relationship: part_of PO:0020022 ! inner integument [Term] id: PO:0020025 name: micropyle namespace: plant_structure 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 namespace: plant_structure 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 relationship: part_of PO:0020003 ! ovule [Term] id: PO:0020027 name: raphe namespace: plant_structure def: "That part of the funiculus that is adnate to the ovule." [APWeb:Glossary, ISBN:047124529] comment: see antiraphe. subset: reference relationship: part_of PO:0020003 ! ovule relationship: part_of PO:0020006 ! funicle [Term] id: PO:0020028 name: antiraphe namespace: plant_structure def: "The region on the other side of the ovule from the raphe." [APWeb:Glossary] comment: see raphe. subset: reference relationship: part_of PO:0020003 ! ovule [Term] id: PO:0020029 name: obturator namespace: plant_structure 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 relationship: develops_from PO:0020006 ! funicle [Term] id: PO:0020030 name: cotyledon namespace: plant_structure def: "A leaf or leaves formed at the first node of a sporophyte." [APWeb:Glossary, GR:pj] subset: reference is_a: PO:0006001 ! phyllome relationship: part_of PO:0008037 ! seedling [Term] id: PO:0020031 name: radicle namespace: plant_structure 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 namespace: plant_structure 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" [] relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020033 name: coleoptile namespace: plant_structure 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 ! leaf relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020034 name: coleorhiza namespace: plant_structure def: "Tissue surrounding the radicle in the embryo or seedling of some monocots." [APWeb:Glossary] relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020035 name: epicotyl namespace: plant_structure def: "The first internode of the stem above the hypocotyl. In literature also used for the entire embryonic axis\, consisting of several internodes\, above the cotyledonary node. " [APWeb:Glossary] relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020036 name: epiblast namespace: plant_structure def: "A flap of tissue in an embryo or seedling arising opposite to the insertion of the cotyledon/scutellum." [APWeb:Glossary] relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020037 name: mesocotyl namespace: plant_structure def: "The internode between the cotyledon or cotyledons and the leaf or leaves at the next node of a young sporophyte." [APWeb:Glossary] relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020038 name: petiole namespace: plant_structure def: "The stalk of a leaf." [APWeb:Glossary, GR:pj] relationship: part_of PO:0009025 ! leaf [Term] id: PO:0020039 name: leaf lamina namespace: plant_structure def: "The blade of a leaf\, usually dorsiventrally flattened\, and expanded." [APWeb:Glossary] synonym: "leaf blade" [] relationship: part_of PO:0009025 ! leaf [Term] id: PO:0020040 name: leaf base namespace: plant_structure def: "The bottom part of a leaf where it attaches to the stem." [APWeb:Glossary] synonym: "leaf sheath base" [] relationship: part_of PO:0009025 ! leaf [Term] id: PO:0020041 name: stipule namespace: plant_structure 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. relationship: part_of PO:0009025 ! leaf [Term] id: PO:0020042 name: simple leaf namespace: plant_structure def: "A leaf in which the lamina is undivided." [Poc:curators] is_a: PO:0009025 ! leaf [Term] id: PO:0020043 name: compound leaf namespace: plant_structure def: "A leaf having two or more distinct leaflets that are evident as such from early in development." [APWeb:Glossary] is_a: PO:0009025 ! leaf [Term] id: PO:0020044 name: hyperphyll namespace: plant_structure def: "The unifacial terete apical portion of a monocot cotyledon\, sometimes also visible on other leaves." [APWeb:Glossary] relationship: part_of PO:0020030 ! cotyledon [Term] id: PO:0020045 name: pinnate leaf namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A diploid (2n) cell that undergoes meiosis and produces four haploid (1n) microspores." [ISBN:0878934030] subset: reference synonym: "PMC" [] synonym: "microspore mother cell" [] synonym: "pollen mother cell" [] xref_analog: 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 namespace: plant_structure 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_analog: CL:0000252 is_a: PO:0009002 ! plant cell relationship: develops_from PO:0000032 ! tetrad of microspores [Term] id: PO:0020049 name: leaflet namespace: plant_structure def: "One of the ultimate segments of a compound leaf." [APWeb:Glossary] relationship: part_of PO:0020043 ! compound leaf [Term] id: PO:0020050 name: petiolule namespace: plant_structure def: "The stalk of a leaflet." [APWeb:Glossary] relationship: part_of PO:0020049 ! leaflet [Term] id: PO:0020051 name: stipel namespace: plant_structure 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] relationship: part_of PO:0020049 ! leaflet [Term] id: PO:0020052 name: megaphyll namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A reduced leaf surrounding a dormant bud." [UMSL:tk] is_a: PO:0006003 ! scale leaf [Term] id: PO:0020055 name: leaf rachis namespace: plant_structure def: "That part of the main axis of a pinnate or more highly compound leaf\, that bears leaflets or divisions of the axis." [APWeb:Glossary] relationship: part_of PO:0020043 ! compound leaf [Term] id: PO:0020056 name: tegmen namespace: plant_structure def: "That part of the seed coat that develops from the inner integument." [APWeb:Glossary, ISBN:0080374913] relationship: part_of PO:0009088 ! seed coat [Term] id: PO:0020057 name: testa namespace: plant_structure 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] relationship: part_of PO:0009088 ! seed coat [Term] id: PO:0020058 name: perisperm alt_id: PO:0006335 namespace: plant_structure def: "Diploid nutritive tissue in an angiospermous seed derived from nucellar tissue." [APWeb:Glossary] synonym: "seed nucellus" [] is_a: PO:0009007 ! tissue relationship: part_of PO:0009010 ! seed [Term] id: PO:0020059 name: pollen wall namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "A tuft of hairs at one end of a seed." [APWeb:Glossary] synonym: "brush" [] relationship: part_of PO:0009010 ! seed [Term] id: PO:0020062 name: elaiosome namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "OBSOLETE. Fruit that breaks open at maturity to release the contents." [APWeb:Glossary] is_obsolete: true [Term] id: PO:0020065 name: indehiscent fruit namespace: plant_structure def: "OBSOLETE. Fruit that does not open at maturity." [APWeb:Glossary] is_obsolete: true [Term] id: PO:0020066 name: fleshy fruit namespace: plant_structure 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 namespace: plant_structure 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 namespace: plant_structure def: "OBSOLETE." [Poc:curators] is_obsolete: true [Term] id: PO:0020084 name: pyrene namespace: plant_structure 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 namespace: plant_structure def: "OBSOLETE." [Poc:curators] is_obsolete: true [Term] id: PO:0020086 name: multiple fruit namespace: plant_structure 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 namespace: plant_structure 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_analog: CL:0000278 is_a: PO:0009002 ! plant cell relationship: part_of PO:0020092 ! female gametophyte [Term] id: PO:0020091 name: male gametophyte alt_id: PO:0020007 namespace: plant_structure def: "A plant body or cell lineage formed by vegetative growth of the microspore\, producing male gametes." [APWeb:Glossary] subset: reference synonym: "microgametophyte" [] synonym: "pollen" [] synonym: "pollen grain" [] is_a: PO:0009004 ! gametophyte [Term] id: PO:0020092 name: female gametophyte namespace: plant_structure def: "Embryo sac in flowering plants." [APWeb:Glossary] subset: reference synonym: "embryo sac" [] synonym: "megagametophyte" [] is_a: PO:0009004 ! gametophyte [Term] id: PO:0020093 name: antipodal cell namespace: plant_structure 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_analog: CL:0000537 is_a: PO:0009002 ! plant cell relationship: part_of PO:0020092 ! female gametophyte [Term] id: PO:0020094 name: egg cell namespace: plant_structure def: "A non motile cell at the apex of the embryo sac immediately adjacent to the micropyle and associated with the synergid cells." [APWeb:Glossary] subset: reference xref_analog: CL:0000254 is_a: PO:0009002 ! plant cell relationship: part_of PO:0020096 ! egg apparatus [Term] id: PO:0020095 name: polar nucleus namespace: plant_structure 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 namespace: plant_structure def: "The egg cell and two synergids located at the micropylar end of the female gametophyte\, or the embryo sac\, in angiosperms." [TAIR:lr] subset: reference relationship: part_of PO:0020092 ! female gametophyte [Term] id: PO:0020097 name: generative cell namespace: plant_structure def: "A cell of the male gametophyte of angiosperms that divides to produce two male gametes or sperm cells." [APWeb:Glossary] subset: reference xref_analog: CL:0000280 is_a: PO:0009002 ! plant cell relationship: part_of PO:0020091 ! male gametophyte [Term] id: PO:0020099 name: vegetative cell namespace: plant_structure def: "The larger cell of the male gametophyte of angiosperms that does not divide further." [APWeb:Glossary] subset: reference xref_analog: CL:0000296 is_a: PO:0009002 ! plant cell relationship: part_of PO:0020091 ! male gametophyte [Term] id: PO:0020100 name: hypocotyl namespace: plant_structure def: "The part of the stem below the cotyledonary node and transitional to a root\, found in a young sporophyte." [APWeb:Glossary] relationship: part_of PO:0019018 ! embryo axis [Term] id: PO:0020101 name: stomium namespace: plant_structure 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: transmitting tissue namespace: plant_structure def: "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" [] is_a: PO:0009007 ! tissue relationship: part_of PO:0009074 ! style [Term] id: PO:0020103 name: flag leaf namespace: plant_structure 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 namespace: plant_structure def: "Any tubular portion of the leaf surrounding the stem\, as in the Poaceae." [GR:pj] relationship: part_of PO:0009025 ! leaf [Term] id: PO:0020105 name: ligule namespace: plant_structure 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] relationship: part_of PO:0009025 ! leaf [Term] id: PO:0020106 name: auricle namespace: plant_structure def: "Outgrowth at the base of a leaf blade that may wrap around the stem." [GR:pj] relationship: part_of PO:0009025 ! leaf [Term] id: PO:0020108 name: suspensor namespace: plant_structure 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 namespace: plant_structure 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:0009002 ! plant cell relationship: part_of PO:0020108 ! suspensor [Term] id: PO:0020110 name: scutellum namespace: plant_structure def: "A more or less shield-shaped and absorptive portion of an embryo of grasses\, probably a modified cotyledon." [APWeb:Glossary] synonym: "haustorial cotyledon" [] relationship: part_of PO:0009009 ! embryo [Term] id: PO:0020121 name: lateral root namespace: plant_structure 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 namespace: plant_structure def: "The central supporting structure around which flowers are borne." [UMSL:fz] comment: cob (sensu Zea) is different from the cob inflorescence found in Sorghum. synonym: "first order inflorescence branch" [] synonym: "inflorescence rachis" [] relationship: part_of PO:0009049 ! inflorescence [Term] id: PO:0020123 name: root cap namespace: plant_structure 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 namespace: plant_structure 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" [] relationship: part_of PO:0009005 ! root [Term] id: PO:0020125 name: elongation zone namespace: plant_structure 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" [] synonym: "region of radial enlargement" [] relationship: part_of PO:0009005 ! root [Term] id: PO:0020126 name: tassel namespace: plant_structure 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 namespace: plant_structure def: "The root which develops directly from the embryonic radicle." [ISBN:0122151704] synonym: "tap root" [] is_a: PO:0009005 ! root relationship: develops_from PO:0020031 ! radicle [Term] id: PO:0020128 name: leaf margin namespace: plant_structure def: "The margin or edge of the lamina." [UMSL:fz] synonym: "leaf lamina margin" [] relationship: part_of PO:0020039 ! leaf lamina [Term] id: PO:0020130 name: central root cap namespace: plant_structure def: "The central part of a root cap in which the cells are arranged in longitudinal files." [GR:pj] synonym: "columella cells" [] relationship: part_of PO:0020123 ! root cap [Term] id: PO:0020131 name: lateral root cap namespace: plant_structure def: "The part of the root cap that is parallel to the sides of the axis." [ISBN:0122151704] synonym: "peripheral cells" [] relationship: part_of PO:0020123 ! root cap [Term] id: PO:0020132 name: columella root cap cell namespace: plant_structure def: "Cell that constitutes the central part of the root cap\, arranged in longitudinal files." [PMID:9384380, TAIR:ki] is_a: PO:0009002 ! plant cell relationship: develops_from PO:0020133 ! columella root cap initial cell [Term] id: PO:0020133 name: columella root cap initial cell namespace: plant_structure 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" [] is_a: PO:0000059 ! root initial cell [Term] id: PO:0020134 name: statolith namespace: plant_structure 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 namespace: plant_structure 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" [] synonym: "specialization zone" [] relationship: part_of PO:0009005 ! root [Term] id: PO:0020136 name: ear (sensu Zea) namespace: plant_structure 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" [] is_a: PO:0009049 ! inflorescence [Term] id: PO:0020137 name: leaf apex namespace: plant_structure def: "The top part of the leaf\, usually the apex of the leaf blade." [UMSL:fz] synonym: "leaf tip" [] relationship: part_of PO:0020039 ! leaf lamina [Term] id: PO:0020138 name: leaf vein namespace: plant_structure def: "A strand of vascular tissue in the leaf blade." [APWeb:Glossary] relationship: part_of PO:0020039 ! leaf lamina [Term] id: PO:0020139 name: midvein namespace: plant_structure def: "The central\, and usually the most prominent\, vein of a leaf or leaf-like organ." [APWeb:Glossary] synonym: "mid rib" [] is_a: PO:0020138 ! leaf vein [Term] id: PO:0020140 name: secondary vein namespace: plant_structure def: "Second order veins in the leaf blade." [GR:pj] synonym: "veinlet" [] is_a: PO:0020138 ! leaf vein [Term] id: PO:0020141 name: stem node namespace: plant_structure def: "The level (transverse plane) of a stem at which one or more leaves and associated axillary bud(s) arise." [APWeb:Glossary] is_a: PO:0005004 ! shoot node relationship: part_of PO:0009047 ! stem [Term] id: PO:0020142 name: stem internode namespace: plant_structure def: "The portion of a stem between the level of insertion of two successive leaves\, leaf pairs or leaf whorls\, or branches of an inflorescence\, i.e. between two nodes." [APWeb:Glossary] comment: see node. is_a: PO:0005005 ! shoot internode relationship: part_of PO:0009047 ! stem [Term] id: PO:0020144 name: apical meristem namespace: plant_structure def: "The meristems located at the apices of the main and lateral shoots and roots." [GR:pj] synonym: "primary meristem" [] is_a: PO:0009013 ! meristem [Term] id: PO:0020145 name: lateral meristem namespace: plant_structure def: "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" [] is_a: PO:0009013 ! meristem [Term] id: PO:0020147 name: root apical meristem namespace: plant_structure def: "Meristem at the root apex." [GR:pj, UMSL:fz] comment: In most cases it is involved in root elongation. synonym: "promeristem" [] is_a: PO:0006085 ! root meristem is_a: PO:0020144 ! apical meristem [Term] id: PO:0020148 name: shoot apical meristem namespace: plant_structure def: "Meristem formed in the apex of the shoot\, including meristems originating as axillary shoot meristems." [UMSL:fz] synonym: "apical meristem" [] synonym: "primary shoot meristem" [] 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 namespace: plant_structure def: "Hemispherically shaped aggregation of mitotically and metabolically inactive cells positioned behind the root cap." [ISBN:0122151704] relationship: part_of PO:0006085 ! root meristem [Typedef] id: develops_from name: develops from [Typedef] id: part_of name: part_of