List of terms without is a parents
Back to POC_Conf._Call_10-6-10
[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]
[Term]
id: PO:0000029
name: root hair tip
def: "Tip portion of an outgrowth of a root epidermal cell." [TAIR:ki]
[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
[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
[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
[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 []
[Term]
id: PO:0002001
name: papillae
def: "A soft protuberance on an epidermal cell of the stigma." [ISBN:0471245208]
subset: reference
[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]
[Term]
id: PO:0004540
name: fruit columella
def: "Central axis of the fruit." [POC:curators]
subset: Tomato
[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
[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 []
[Term]
id: PO:0004724
name: hypocotyl-root junction
def: "Junction point of the embryonic root and hypocotyl." [TAIR:ki]
subset: reference
[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]
[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]
[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]
[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
[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]
[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]
[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]
[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
[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
[Term]
id: PO:0008031
name: trichome branch
def: "The branch on a trichome." [GR:cwt]
[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: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]
[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:0009019
name: basal endosperm transfer layer
def: "A cell layer found in basal endosperm transfer cell." [GR:cwt]
[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: SF: 3007368
[Term]
id: PO:0009024
name: stylar ridge of lower floret of pedicellate spikelet of ear
xref: SF:2959654
[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
[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 []
[Term]
id: PO:0009076
name: stylar ridge of lower floret of sessile spikelet of ear
xref: SF:2959654
[Term]
id: PO:0009079
name: stylar ridge of upper floret of pedicellate spikelet of ear
xref: SF:2959654
[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
[Term]
id: PO:0009092
name: stylar ridge of upper floret of sessile spikelet of ear
xref: SF:2959654
[Term]
id: PO:0019022
name: arilloid
def: "An outgrowth from parts of the seed other than from the funiculus or raphe." [ISBN:0080280293]
[Term]
id: PO:0020005
name: placentoid
def: "An inpushing of the anther wall." [APWeb:Glossary]
subset: reference
[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
[Term]
id: PO:0020061
name: coma
def: "A tuft of hairs at one end of a seed." [APWeb:Glossary]
synonym: "brush" RELATED []
[Term]
id: PO:0020063
name: hilum
def: "The scar on a seed at the place where it was attached to its funicle." [APWeb:Glossary]
[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
[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:0005011 ! anther dehiscence zone
[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.
[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 []
[Term]
id: PO:0020123
name: root cap
def: "A group of cells that covers the apical meristem of the root." [APWeb:Glossary]
subset: reference
[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 []
[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 []
[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: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 []
[Term]
id: PO:0020149
name: quiescent center
def: "Hemispherically shaped aggregation of mitotically and metabolically inactive cells positioned behind the root cap." [ISBN:0122151704]
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