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