format-version: 1.0
date: 21:07:2005 14:14
saved-by: katica
auto-generated-by: DAG-Edit 1.419 rev 3
default-namespace: plant_ontology
remark: autogenerated-by:     DAG-Edit version 1.419 rev 3
remark: saved-by:             katica
remark: date:                 Fri Jul 08 19:44:07 PDT 2005
remark: version: $Revision: 1.1 $

[Term]
id: PO:0001000
name: meristem eloboration
namespace: plant_growth_and_development_stage
def: "the root meristem gets organized" [GR:ap]
comment: This  term has been obsoleted to keep the structure simple.
is_obsolete: true

[Term]
id: PO:0001002
name: fruit development stages
namespace: plant_growth_and_development_stage
def: "Stages of development of a fruit defined by characteristic morphological\, structural\, histological or other visible features. " [POC:curators]
synonym: "stage 17 flower TAIR\:0000392" []
synonym: "stage 18 flower TAIR\:0000422" []
xref_analog: POC:curators
is_a: PO:0007021 ! plant structure development stage

[Term]
id: PO:0001003
name: P0 formation of the leaf founder cells
namespace: plant_growth_and_development_stage
def: "The initial stage of leaf development  where cells in the SAM are already determined to form a leaf primordium\, but the primordium itself is not distinguishable morphologically." [TAIR:ki]
synonym: "P0 stage" []
is_a: PO:0001051 ! 1 leaf initiation stage

[Term]
id: PO:0001004
name: anther developmental stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the anther defined by characteristic morphological\, cytological\, histological or other visible features." [POC:fz]
xref_analog: POC:fz
is_a: PO:0007605 ! androecium developmental stages

[Term]
id: PO:0001005
name: A archesporial cells visible
namespace: plant_growth_and_development_stage
def: "An initial stage during which archesporial cells arise in four corners of L2 layer. Change in shape of primordia to more oval." [TAIR:ki]
is_a: PO:0001004 ! anther developmental stages

[Term]
id: PO:0001006
name: B enlarged microsporocyte stage
namespace: plant_growth_and_development_stage
def: "Stage during which the microsporocytes become conspicuous." [TAIR:ki]
synonym: "pollen stage 2 TAIR\:0000057" []
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001007
name: pollen developmental stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the pollen defined by characteristic morphological\, cytological\, histological or other visible features." [POC:fz]
synonym: "pollen development TAIR\:0000055" []
xref_analog: POC:fz
is_a: PO:0007605 ! androecium developmental stages

[Term]
id: PO:0001008
name: C callose wall formation in pollen mother cells
namespace: plant_growth_and_development_stage
def: "Stage during which diploid pollen mother cells become separated from each other and from tapetum by a callose wall." [TAIR:ki]
synonym: "pollen mother cell stage" []
synonym: "pollen stage 3 TAIR\:0000058" []
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001009
name: D pollen mother cell meiosis stage
namespace: plant_growth_and_development_stage
def: "Stage during which pollen mother cells undergo meiosis to form tetrads of microspores." [TAIR:ki]
synonym: "pollen stage 4 TAIR\:0000059" []
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001010
name: F microspore release stage
namespace: plant_growth_and_development_stage
def: "Stage of microgametophyte development during which the callose wall between the tetrads breaks down and haploid microspores are released and lie freely in locules. " [TAIR:ki]
synonym: "pollen stage 5 TAIR\:0000060" []
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001011
name: A microsporogenous mass stage
namespace: plant_growth_and_development_stage
def: "An initial stage during which the archesporial cells divide to give rise to primary parietal and sporogenous cells." [TAIR:ki]
synonym: "pollen stage 1 TAIR\:0000056" []
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001012
name: G early unicellular microspore stage
namespace: plant_growth_and_development_stage
def: "Stage of microgametophyte development during which the microspores round up and small vacuoles appear in their cytoplasm.  The microspore walls thicken due to the formation of the exine." [TAIR:ki]
synonym: "pollen stage 6 TAIR\:0000061" []
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001013
name: H late unicellular microspore stage
namespace: plant_growth_and_development_stage
def: "Stage of microgametophyte development during which a large vacuole is formed in each microspore causing a rapid increase in size and a displacement of the nucleus to one side." [TAIR:ki]
synonym: "pollen stage 7 TAIR\:0000062" []
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001014
name: I first mitotic division stage
namespace: plant_growth_and_development_stage
def: "Stage of microgametophyte development during which the asymmetric\, first mitotic division of the microspores occurs producing a large vegetative cell and small generative cell\, located near pollen wall." [TAIR:ki]
synonym: "pollen stage 8 TAIR\:0000063" []
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001015
name: K second mitotic division stage
namespace: plant_growth_and_development_stage
def: "Stage of microgametophyte development during which the generative cell undergoes mitotic division to form two male gametes\, the sperm cells." [TAIR:ki]
comment: In taxa with mature two-celled pollen\, the second mitotic division takes place after pollen germination\, in germinating pollen tube.
synonym: "pollen stage 9 TAIR\:0000064" []
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001016
name: L mature pollen stage
namespace: plant_growth_and_development_stage
def: "Stage of microgametophyte development during which the pollen reaches mature stage and desiccates. " [TAIR:ki]
comment: Mature pollen stages is reached at three-celled pollen in some angiosperms (maize\, rice and Arabidopsis)\, while in others\, the maturepollen has  two haploid cells  (tobacco\, snapdragon).
synonym: "pollen stage 10 TAIR\:0000065" []
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001017
name: M germinated pollen stage
namespace: plant_growth_and_development_stage
def: "The final stage in the life cycle of the male gametophyte. Upon rehydration\, mature pollen grain forms a tubular outgrowth\, the pollen tube\, which carries the male gametes." [TAIR:ki]
synonym: "germinated pollen grain TAIR\:0000085" []
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001018
name: B formation of primary parietal and sporogenous cells
namespace: plant_growth_and_development_stage
def: "Stage during which the primary parietal and  primary sporogenous layers are derived from archesporial cells." [TAIR:ki]
is_a: PO:0001004 ! anther developmental stages

[Term]
id: PO:0001019
name: P1 formation of leaf primordium
namespace: plant_growth_and_development_stage
def: "Stage of leaf development  when leaf primordium is formed as a small protrusion on the flank of SAM." [TAIR:ki]
synonym: "P1 stage" []
is_a: PO:0001052 ! 2 leaf expansion stage

[Term]
id: PO:0001020
name: P2 hood-shaped primordium
namespace: plant_growth_and_development_stage
def: "Stage of leaf development  when a hood-shaped  primordium is formed\, partially enclosing P1 and SAM\, as in Poaceae." [TAIR:ki]
synonym: "P2 stage" []
is_a: PO:0001052 ! 2 leaf expansion stage

[Term]
id: PO:0001021
name: P3 formation of ligule primordium
namespace: plant_growth_and_development_stage
def: "Stage of leaf development  when conical P3 leaf completely encloses SAM\, and the ligule primordium is visible\, as in Poaceae. " [TAIR:ki]
synonym: "P3 stage" []
is_a: PO:0001052 ! 2 leaf expansion stage

[Term]
id: PO:0001023
name: P4 rapid elongation of leaf blade
namespace: plant_growth_and_development_stage
def: "Stage of leaf development  during which a rapid elongation of the leaf blade occurs; the elongation of the leaf sheath has not started\, as in Poaceae." [TAIR:ki]
synonym: "P4 stage" []
is_a: PO:0001052 ! 2 leaf expansion stage

[Term]
id: PO:0001024
name: P5 rapid elongation of leaf sheath
namespace: plant_growth_and_development_stage
def: "Stage of leaf development  during which a rapid elongation of the leaf sheath occurs\, as in Poaceae." [TAIR:ki]
synonym: "P5 stage" []
is_a: PO:0001052 ! 2 leaf expansion stage

[Term]
id: PO:0001025
name: C four anther lobes formed
namespace: plant_growth_and_development_stage
def: "Stage during which the four-lobed anther pattern with two developing stomium regions (notch) are formed." [TAIR:ki]
is_a: PO:0001004 ! anther developmental stages

[Term]
id: PO:0001026
name: D locules established
namespace: plant_growth_and_development_stage
def: "Stage during which the four clearly defined locules are established. All anther cell types present and microspore mother cells appear." [TAIR:ki]
synonym: "stage 8 flower TAIR\:0000382" []
is_a: PO:0001004 ! anther developmental stages

[Term]
id: PO:0001027
name: meristamtic zone formation
namespace: plant_growth_and_development_stage
is_obsolete: true

[Term]
id: PO:0001028
name: elongation zone formation
namespace: plant_growth_and_development_stage
is_obsolete: true

[Term]
id: PO:0001029
name: E tetrad stage
namespace: plant_growth_and_development_stage
def: "Stage immediately following meiosis\, during which the tetrads of microspores are still hold together\, enclosed by the callose wall. " [TAIR:ki]
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001030
name: specialization zone formation
namespace: plant_growth_and_development_stage
is_obsolete: true

[Term]
id: PO:0001031
name: 4 root elongation
namespace: plant_growth_and_development_stage
def: "The stage at which root is elongating." [POC:cuartors]
synonym: "Benfey's stage 2 of root development" []
is_a: PO:0007520 ! root development stages

[Term]
id: PO:0001032
name: E tapetum degeneration initiated
namespace: plant_growth_and_development_stage
def: "Stage during which degeneration of the tapetum is initiated\, as the deposition on the surface of the microspore primexine proceeds." [TAIR:ki]
comment: Microspores within single locule are at unicellular stage.
is_a: PO:0001004 ! anther developmental stages

[Term]
id: PO:0001034
name: F bilocular anther stage
namespace: plant_growth_and_development_stage
def: "Stage during which anther becomes bilocular\, after degeneration and breakage of septum below stomium." [TAIR:ki]
is_a: PO:0001004 ! anther developmental stages

[Term]
id: PO:0001035
name: G anther dehiscence
namespace: plant_growth_and_development_stage
def: "Stage during which the dehiscence of anthers occurs. Anther breaks along stomium and pollen is released." [TAIR:ki]
is_a: PO:0001004 ! anther developmental stages

[Term]
id: PO:0001036
name: H anther senescence
namespace: plant_growth_and_development_stage
def: "Stage during which the senescence of anther and stamen occurs. Shrinkage of cells and anther structure takes place." [TAIR:ki]
is_a: PO:0001004 ! anther developmental stages

[Term]
id: PO:0001040
name: dry seed
namespace: plant_growth_and_development_stage
def: "Stage during which the seed has attained less than 20% of water content\, entering into metabolically inactive\, dormant or quiescent state." [TAIR:ki]
synonym: "dry seed TAIR\:0000213" []
is_a: PO:0001170 ! seed development stages

[Term]
id: PO:0001041
name: chalazal and micropylar domain establishment
namespace: plant_growth_and_development_stage
def: "The initial stage of endosperm development during which the chalazal and micropilar domains are established." [TAIR:ki]
is_a: PO:0007633 ! endosperm development stages

[Term]
id: PO:0001042
name: functional specialization of the endosperm
namespace: plant_growth_and_development_stage
def: "Stage of endosperm development during which the functional specialization of the maturing endosperm occurs." [TAIR:ki]
is_a: PO:0007633 ! endosperm development stages

[Term]
id: PO:0001043
name: D heart-shape stage
namespace: plant_growth_and_development_stage
def: "Stage during which the basic body plan of the embryo is established." [TAIR:ki]
comment: Two major organ systems\, embryo axis and cotyledons become evident.
synonym: "heart stage TAIR\:0000186" []
is_a: PO:0007631 ! embryo development stages

[Term]
id: PO:0001044
name: sepal differentiation and expansion stage
namespace: plant_growth_and_development_stage
def: "Stage of calyx development defined by differentiation and expansion of sepal." [POC:fz]
xref_analog: POC:fz
is_a: PO:0007603 ! calyx developmental stages

[Term]
id: PO:0001045
name: fully expanded sepal
namespace: plant_growth_and_development_stage
def: "Stage of calyx development when sepal is fully expanded." [POC:fz]
xref_analog: POC:fz
is_a: PO:0007603 ! calyx developmental stages

[Term]
id: PO:0001047
name: lemma developmental stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the lemma defined by characteristic morphological\, structural\, histological or other visible features." [GR:ap, POC:fz]
xref_analog: POC:fz
is_a: PO:0007600 ! 3 floral organ development stages

[Term]
id: PO:0001048
name: palea developmental stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the palea defined by characteristic morphological\, structural\, histological or other visible features." [GR:ap, POC:fz]
xref_analog: POC:fz
is_a: PO:0007600 ! 3 floral organ development stages

[Term]
id: PO:0001049
name: lodicule developmental stages.
namespace: plant_growth_and_development_stage
def: "Stages of development of the lodicule defined by characteristic morphological\, structural\, histological or other visible features." [GR:ap, POC:fz]
xref_analog: POC:fz
is_a: PO:0007600 ! 3 floral organ development stages

[Term]
id: PO:0001050
name: leaf development stages
namespace: plant_growth_and_development_stage
def: "Stages of development of a leaf defined by characteristic morphological\, structural\, histological or other visible features. " [TAIR:tb, POC:curators]
synonym: "leaf development TAIR\:0000050" []
is_a: PO:0007021 ! plant structure development stage

[Term]
id: PO:0001051
name: 1 leaf initiation stage
alt_id: PO:0001003
namespace: plant_growth_and_development_stage
def: "Stage of leaf development that begins when meristematic cells are already determined to form the leaf primordium and ends right before the leaf primordium is visible on the shoot apex.  " [TAIR:tb]
comment: Cells in the primordium are not yet differentiated.
synonym: "leaf initiation TAIR\:0000051" []
is_a: PO:0001050 ! leaf development stages

[Term]
id: PO:0001052
name: 2 leaf expansion stage
namespace: plant_growth_and_development_stage
def: "Stage of leaf development which begins when the leaf primordium is visible and finishes when leaf reaches its full size.\n" [TAIR:ki]
synonym: "leaf expansion stage TAIR\:0000052" []
is_a: PO:0001050 ! leaf development stages

[Term]
id: PO:0001053
name: 3 leaf fully expanded
namespace: plant_growth_and_development_stage
def: "Stage of leaf development when leaf is fully expanded." [TAIR:ki]
synonym: "P6 mature leaf stage" []
synonym: "fully expanded leaf stage TAIR\:0000053" []
is_a: PO:0001050 ! leaf development stages

[Term]
id: PO:0001054
name: 4 leaf senescence stage
namespace: plant_growth_and_development_stage
def: "The final stage of leaf development when the leaf ceases metabolic activity and senesces." [TAIR:tb]
synonym: "leaf senescence stage TAIR\:0000054" []
is_a: PO:0001050 ! leaf development stages

[Term]
id: PO:0001055
name: lemma primordia visible
namespace: plant_growth_and_development_stage
def: "Stage of lemma development that begins when the lemma primordia arise." [POC:fz]
comment: The lemma primordium forms in 1/2 alternate phylotaxy in rice spikelet.
xref_analog: POC:fz
is_a: PO:0001047 ! lemma developmental stages

[Term]
id: PO:0001056
name: lemma differentiation and expansion stage
namespace: plant_growth_and_development_stage
def: "Stage of lemma development defined by differentiation and expansion of lemma." [POC:fz]
xref_analog: POC:fz
is_a: PO:0001047 ! lemma developmental stages

[Term]
id: PO:0001057
name: fully expanded lemma
namespace: plant_growth_and_development_stage
def: "Stage of lemma development when lemma is fully expanded." [POC:fz]
xref_analog: POC:fz
is_a: PO:0001047 ! lemma developmental stages

[Term]
id: PO:0001058
name: palea primordia visible
namespace: plant_growth_and_development_stage
def: "Stage of palea development that begins when the palea primordia arise." [POC:fz]
comment: The palea primordium forms in 1/2 alternate phylotaxy in rice spikelet.
xref_analog: POC:fz
is_a: PO:0001048 ! palea developmental stages

[Term]
id: PO:0001059
name: J bicellular pollen stage
namespace: plant_growth_and_development_stage
def: "Stage of microgametophyte development during which the small generative cell moves inward\, becoming completely surrounded by the cytoplasm of the vegetative cell. " [TAIR:ki]
is_a: PO:0001007 ! pollen developmental stages

[Term]
id: PO:0001070
name: palea differentiation and expansion stage
namespace: plant_growth_and_development_stage
def: "Stage of palea development defined by differentiation and expansion of palea." [POC:fz]
xref_analog: POC:fz
is_a: PO:0001048 ! palea developmental stages

[Term]
id: PO:0001071
name: fully expanded palea
namespace: plant_growth_and_development_stage
def: "Stage of palea development when palea is fully expanded." [POC:fz]
xref_analog: POC:fz
is_a: PO:0001048 ! palea developmental stages

[Term]
id: PO:0001072
name: lodicule primordia visible
namespace: plant_growth_and_development_stage
def: "Stage of palea development that begins when the palea primordia arise." [POC:fz]
comment: Two lodicules form on the side of the lemma in rice spikelet.
xref_analog: POC:fz
is_a: PO:0001049 ! lodicule developmental stages.

[Term]
id: PO:0001074
name: N second mitotic division stage in germinating pollen
namespace: plant_growth_and_development_stage
def: "Stage of microgametophyte development during which the generative cell undergoes a mitotic division to form two male gametes\, the sperm cells." [TAIR:ki]
is_a: PO:0001017 ! M germinated pollen stage

[Term]
id: PO:0001076
name: E torpedo stage
namespace: plant_growth_and_development_stage
def: "Stage during which elongation of linear embryo axis and cotyledons takes place.  " [TAIR:ki]
comment: This term is specifically used in Arabidopsis
synonym: "torpedo stage TAIR\:0000187" []
is_a: PO:0007631 ! embryo development stages

[Term]
id: PO:0001077
name: lodicule differentiation and expansion stage
namespace: plant_growth_and_development_stage
def: "Stage of lodicule development defined by differentiation and expansion of lodicule." [POC:fz]
xref_analog: POC:fz
is_a: PO:0001049 ! lodicule developmental stages.

[Term]
id: PO:0001078
name: F cotyledon stage
namespace: plant_growth_and_development_stage
def: "The stage during which embryo axis and cotyledons rapidly elongate as a result of cell division and cell expansion." [TAIR:ki]
synonym: "curled cotyledon stage TAIR\:0000320" []
is_a: PO:0007631 ! embryo development stages

[Term]
id: PO:0001079
name: fully expanded lodicule
namespace: plant_growth_and_development_stage
def: "Stage of lodicule development when lodicule is fully expanded." [POC:fz]
xref_analog: POC:fz
is_a: PO:0001049 ! lodicule developmental stages.

[Term]
id: PO:0001081
name: mature embryo stage
namespace: plant_growth_and_development_stage
def: "terminal stage at which the embryo expansion and its cellular metabolic activities has ceased." [TAIR:ki]
synonym: "mature TAIR\:0000368" []
is_a: PO:0007631 ! embryo development stages

[Term]
id: PO:0001083
name: inflorescence development stages
namespace: plant_growth_and_development_stage
def: "Stages of development of an inflorescence defined by characteristic morphological\, structural\, histological or other visible features. " [POC:curators]
xref_analog: POC:curators
is_a: PO:0007021 ! plant structure development stage

[Term]
id: PO:0001094
name: coleoptilar stage
namespace: plant_growth_and_development_stage
def: "The coleoptilar primordium\, SAM and radicle are formed in the embryo of grasses." [TAIR:ki]
synonym: "SAM and radicle formation stage" []
is_a: PO:0007631 ! embryo development stages

[Term]
id: PO:0001095
name: true leaf formation
namespace: plant_growth_and_development_stage
def: "During this stage\, the protrusion of the first leaf primordia takes place in succession in the grass embryo." [TAIR:ki]
is_a: PO:0007631 ! embryo development stages

[Term]
id: PO:0001096
name: primary endosperm cell stage
namespace: plant_growth_and_development_stage
def: "One cell stage that takes place following the fertilization\, produced by the fusion of sperm cell nucleus and one or more polar nuclei." [TAIR:ki]
is_a: PO:0007633 ! endosperm development stages

[Term]
id: PO:0001097
name: A zygote
namespace: plant_growth_and_development_stage
def: "One cell stage that results from fertilization." [PO:KI]
synonym: "one cell stage" []
synonym: "zygote TAIR\:0000097" []
is_a: PO:0007631 ! embryo development stages

[Term]
id: PO:0001098
name: formation of starchy endosperm
namespace: plant_growth_and_development_stage
def: "Stage of endosperm development during wich the formation of starchy endosperm occurs." [TAIR:ki]
is_obsolete: true

[Term]
id: PO:0001099
name: formation of aleurone and starchy layers
namespace: plant_growth_and_development_stage
def: "Differentiation of aleurone layer\, the outermost endosperm tissue\, and the internal starchy tissue." [TAIR:ki]
is_a: PO:0001042 ! functional specialization of the endosperm

[Term]
id: PO:0001170
name: seed development stages
namespace: plant_growth_and_development_stage
def: "Stages of seed development\, from fertilization to the dry or quiescent state." [TAIR:ki]
synonym: "seed development TAIR\:0000170" []
is_a: PO:0007021 ! plant structure development stage

[Term]
id: PO:0001177
name: transition stage
namespace: plant_growth_and_development_stage
def: "Stage during which a switch from radial to bilateral symmetry takes place and a further axis of asymmetry becomes imposed on the embryo." [TAIR:ki]
synonym: "triangle stage TAIR\:0000029" []
is_a: PO:0007631 ! embryo development stages

[Term]
id: PO:0001180
name: B proembryo stage
namespace: plant_growth_and_development_stage
def: "A stage in the early development of the sporophyte between the zygote and the embryo\, multicellular\, but before the appearance of any organ rudiments" [TAIR:ki, APWeb:glossary]
synonym: "eight-celled stage TAIR\:0000180" []
synonym: "two-celled stage TAIR\:0000177" []
is_a: PO:0007631 ! embryo development stages

[Term]
id: PO:0001185
name: C globular stage
namespace: plant_growth_and_development_stage
def: "During this stage the embryo proper retains radial symmetry (increasing in diameter)\, and three main tissue systems are established." [TAIR:ki]
synonym: "dermatogen stage TAIR\:0000369" []
synonym: "globular stage TAIR\:0000028" []
synonym: "late globular stage TAIR\:0000185" []
synonym: "mid-globular stage TAIR\:0000184" []
is_a: PO:0007631 ! embryo development stages

[Term]
id: PO:0001378
name: sepals enclosing meristem
namespace: plant_growth_and_development_stage
def: "Stage of calyx development that begins when the developing sepals overlie the floral meristem." [ISBN:0387940898]
synonym: "Arabidopsis stage 4" []
is_a: PO:0001044 ! sepal differentiation and expansion stage

[Term]
id: PO:0001380
name: sepals enclosing floral bud
namespace: plant_growth_and_development_stage
def: "Stage of calyx development that begins when the sepals enclose the floral bud." [ISBN:0387940898]
synonym: "Arabidopsis stage 6 TAIR\:0000380" []
is_a: PO:0001044 ! sepal differentiation and expansion stage

[Term]
id: PO:0007021
name: plant structure development stage
namespace: plant_growth_and_development_stage
def: "The succession of changes during the development of plant parts." [POC:curators]
is_a: PO:0009012 ! plant growth and development stage

[Term]
id: PO:0007501
name: root cap formation
namespace: plant_growth_and_development_stage
def: "The stage at which the root cap becomes evident. " [GR:ap]
comment: The number and origin of root cap initials that form the root cap varies among species. The root cap initials become independent from the more internally located root meristem cells by an increase in the thickness of the cell wall that separates them
synonym: "Root cap formation in crown root." []
synonym: "Root cap formation in lateral root." []
synonym: "Root cap formation in primary root." []
is_a: PO:0007525 ! 3 establishment of tissue systems

[Term]
id: PO:0007503
name: A2.1 root intials differntiation of primary roots
namespace: plant_growth_and_development_stage
def: "The root initials divide repeatedly and add more cells" [GR:ap]
comment: This  term has been obsoleted to keep the structure simple.
is_obsolete: true

[Term]
id: PO:0007504
name: crown root primordium formation
namespace: plant_growth_and_development_stage
def: "The stage at which the initial cells of crown root primordium are formed in  the innermost ground meristem cells by one or two periclinal divisions." [GR:ap]
comment: Crown root primordia formed endogenously opposite the collateral bundles in maize.
is_a: PO:0007505 ! 1 root primordium formation

[Term]
id: PO:0007505
name: 1 root primordium formation
namespace: plant_growth_and_development_stage
def: "The stage at which root primordium originates and develops at specific locations in embryonic and post embryonic roots." [GR:ap]
is_a: PO:0007520 ! root development stages

[Term]
id: PO:0007506
name: primary root primordium formation
namespace: plant_growth_and_development_stage
def: "The stage at which a group of cells or initials that will differentiate into the primary root become organized in the embryo ." [GR:ap]
is_a: PO:0007505 ! 1 root primordium formation

[Term]
id: PO:0007507
name: radicle emergence
namespace: plant_growth_and_development_stage
def: "The stage at which the radicle emerges through the coleorhiza." [GR:ap]
is_a: PO:0007510 ! root emergence

[Term]
id: PO:0007509
name: root vascular cylinder differentiation
namespace: plant_growth_and_development_stage
def: "The stage at which the root vascular cylinder becomes evident." [GR:ap]
comment: The first identifiable region in the differentiating vascular cylinder is the pericycle. In the xylem the differentiation of the tracheary elements begins in a centrifugal direction but is completed in the centripetal direction. The first phloem elements mature before the first xylem elements.
is_a: PO:0007525 ! 3 establishment of tissue systems

[Term]
id: PO:0007510
name: root emergence
namespace: plant_growth_and_development_stage
def: "The stage at which the fully formed root emerges." [GR:ap]
is_a: PO:0001031 ! 4 root elongation

[Term]
id: PO:0007511
name: lateral root primordium formation
namespace: plant_growth_and_development_stage
def: "This stage at which the transverse divisions in pericycle cells form the initials of the lateral root primordium." [GR:ap]
is_a: PO:0007505 ! 1 root primordium formation

[Term]
id: PO:0007512
name: A2 root initials differentiation stage
namespace: plant_growth_and_development_stage
def: "The root initials differentiate by cell division and cell expansion. " [GR:ap]
comment: Crown root stages are based on rice plant. This  term has been obsoleted to keep the structure simple.
is_obsolete: true

[Term]
id: PO:0007513
name: root cortex differentiation
namespace: plant_growth_and_development_stage
def: "The stage at which the root cortex becomes evident." [GR:ap]
comment: Repetitive periclinal divisions and radial enlargement of cells form the cortex layers\, the innermost layers become the endodermis with the differentiation of casparian strips.
synonym: "Cortex differentiation of crown root." []
synonym: "Cortex differentiation of lateral root" []
synonym: "Cortex differentiation of primary root." []
is_a: PO:0007525 ! 3 establishment of tissue systems

[Term]
id: PO:0007514
name: B3 crown root meristem formation
namespace: plant_growth_and_development_stage
def: "The stage at which the meristem of the crown root becomes evident." [GR:ap]
is_obsolete: true

[Term]
id: PO:0007516
name: root epidermal differentiation
namespace: plant_growth_and_development_stage
def: "The stage at which the root epidermis becomes evident." [GR:ap]
comment: Root hairs come to full development beyond the region of elongation zone\, approximately at the level where the xylem begins to mature.
synonym: "Epidermal differentiation of lateral root." []
synonym: "Epidermal differentiation of primary root" []
synonym: "Epidermial differentiation of crown root." []
is_a: PO:0007525 ! 3 establishment of tissue systems

[Term]
id: PO:0007517
name: lateral root emergence
namespace: plant_growth_and_development_stage
def: "The stage at which the lateral root emerges." [GR:ap]
comment: Starch grains can be seen in the root cap after emergence.
is_a: PO:0007510 ! root emergence

[Term]
id: PO:0007518
name: crown root emergence
namespace: plant_growth_and_development_stage
def: "The stage at which the crown root emerges." [GR:ap]
comment: Crown root stages are based on rice plant.
is_a: PO:0007510 ! root emergence

[Term]
id: PO:0007519
name: 5 root hair formation
namespace: plant_growth_and_development_stage
def: "The stage at which the root hairs becomes evident. " [GR:ap]
synonym: "Benfey's stage 3 of root development" []
is_a: PO:0007520 ! root development stages

[Term]
id: PO:0007520
name: root development stages
namespace: plant_growth_and_development_stage
def: "Stages of development of a root defined by characteristic morphological\, structural\, histological or other visible features. " [GR:ap]
comment: At present the stages are described for primary\, lateral and crown roots.
is_a: PO:0007021 ! plant structure development stage

[Term]
id: PO:0007521
name: C3.1 metaxylem differentiation of root.
namespace: plant_growth_and_development_stage
def: "Differentiation begins with the enlargement and vacuolation of the tracheary elements of the metaxylem." [GR:ap]
comment: These stages are based on Arabidopsis plant. This  term has been obsoleted to keep the structure simple.
synonym: "metaxylem differentiation of crown root" []
synonym: "metaxylem differentiation of lateral root" []
synonym: "metaxylem differentiation of primary root" []
is_obsolete: true

[Term]
id: PO:0007523
name: establishment of initial cells
namespace: plant_growth_and_development_stage
is_obsolete: true

[Term]
id: PO:0007524
name: B1 primary root meristem formation
namespace: plant_growth_and_development_stage
def: "The stage at which the meristem of the primary root becomes evident." [GR:ap]
is_obsolete: true

[Term]
id: PO:0007525
name: 3 establishment of tissue systems
namespace: plant_growth_and_development_stage
def: "The stage at which distinct tissues become organized." [GR:ap]
synonym: "Benfey's stage 1 of root development" []
synonym: "Cell differentiation stage of root development" []
synonym: "establishment of fundamental organization in adventitious root" []
synonym: "establishment of fundamental organization in primary root." []
synonym: "establishment of fundamental organization lateral root." []
is_a: PO:0007520 ! root development stages

[Term]
id: PO:0007526
name: F2 root hair elongation
namespace: plant_growth_and_development_stage
def: "The stage at which the root hairs are fully elongated." [GR:ap]
is_obsolete: true

[Term]
id: PO:0007527
name: 2 root meristem formation
namespace: plant_growth_and_development_stage
def: "The stage at which the root meristem becomes evident. " [GR:ap]
comment: Characteristic differences in meristem organization have been related to taxonomic groups.
is_a: PO:0007520 ! root development stages

[Term]
id: PO:0007528
name: A2.2 root initials differentiation of lateral roots
namespace: plant_growth_and_development_stage
def: "Radial expansion followed by subsequent periclinal divisions forms the pericycle-derived tissues." [GR:ap]
comment: This  term has been obsoleted to keep the structure simple.
is_obsolete: true

[Term]
id: PO:0007529
name: E emerged root elongation
namespace: plant_growth_and_development_stage
def: "The stage at which the emerged root starts to elongate. " [GR:ap]
synonym: "emerged crown root elongation" []
synonym: "emerged lateral root elongation" []
synonym: "emrged primary root elongation" []
is_obsolete: true

[Term]
id: PO:0007530
name: A2.3 founder cell derivatives of lateral root
namespace: plant_growth_and_development_stage
def: "Radial expansion followed by subsequent periclinal divisions forms the isodiametric founder cell tissues." [GR:ap]
comment: This  term has been obsoleted to keep the structure simple.
is_obsolete: true

[Term]
id: PO:0007531
name: F1 root hair initiation
namespace: plant_growth_and_development_stage
def: "The stage at which the roots hairs are initiated." [GR:ap]
is_obsolete: true

[Term]
id: PO:0007532
name: obsolete plant growth and development terms
namespace: plant_growth_and_development_stage
is_obsolete: true

[Term]
id: PO:0007533
name: C3.3 maturation of protoxylem elements in root.
namespace: plant_growth_and_development_stage
def: "The first protoxylem elements next to the pericycle develop secondary walls and mature." [GR:ap]
comment: This  term has been obsoleted to keep the structure simple.
synonym: "maturation of protoxylem elements in crown root" []
synonym: "maturation of protoxylem elements in lateral root" []
synonym: "maturation of protoxylem elements in primary root" []
is_obsolete: true

[Term]
id: PO:0007534
name: A2.4 root initials differentiation of crown roots
namespace: plant_growth_and_development_stage
def: "Initial cells of crown root primordium divide anticlinally and periclinally to form epidermis-endodermis initial\, vascular-cylinder initial and root cap initial." [GR:ap]
comment: Crown root stages are based on rice plant. This  term has been obsoleted to keep the structure simple.
is_obsolete: true

[Term]
id: PO:0007535
name: A1 root initials formation stage
namespace: plant_growth_and_development_stage
def: "After the formation of the apical-basal axis in the young embryo\, the central and basal portion give rise to the root meristem. " [GR:ap]
comment: Endogenously formed embryonic roots are exclusive to Poaceae.\nThis  term has been obsoleted to keep the structure simple.
is_obsolete: true

[Term]
id: PO:0007536
name: root primordium visible
namespace: plant_growth_and_development_stage
is_obsolete: true

[Term]
id: PO:0007537
name: C3.2 maturation of phloem elements in root.
namespace: plant_growth_and_development_stage
def: "The first phloem elements matures." [GR:ap]
comment: This  term has been obsoleted to keep the structure simple.
synonym: "maturation phloem elements of crown root." []
synonym: "maturation phloem elements of lateral root." []
synonym: "maturation phloem elements of primary root." []
is_obsolete: true

[Term]
id: PO:0007539
name: B2 lateral root meristem formation
namespace: plant_growth_and_development_stage
def: "The stage at which the meristem of the lateral root becomes evident." [GR:ap]
is_obsolete: true

[Term]
id: PO:0007600
name: 3 floral organ development stages
namespace: plant_growth_and_development_stage
def: "Stages of development of floral organs defined by characteristic morphological\, structural\, histological or other visible features. " [POC:curators]
is_a: PO:0007615 ! flower development stages

[Term]
id: PO:0007601
name: 1 floral meristem visible
namespace: plant_growth_and_development_stage
def: "Stage of flower development marked by the emergence of the floral meristem on the flank of the inflorescence meristem." [POC:curators]
synonym: "stage 1 flower TAIR\:0000375" []
is_a: PO:0007615 ! flower development stages

[Term]
id: PO:0007602
name: 2 floral meristem notched
namespace: plant_growth_and_development_stage
def: "Stage of floral development that begins when the floral meristem becomes demarcated from the inflorescence meristem by a slight indentation." [POC:curators]
synonym: "stage 2 flower TAIR\:0000376" []
is_a: PO:0007615 ! flower development stages

[Term]
id: PO:0007603
name: calyx developmental stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the calyx defined by characteristic morphological\, structural\, histological or other visible features." [POC:curators]
is_a: PO:0007600 ! 3 floral organ development stages

[Term]
id: PO:0007604
name: corolla developmental stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the corolla defined by characteristic morphological\, structural\, histological or other visible features." [POC:curators]
is_a: PO:0007600 ! 3 floral organ development stages

[Term]
id: PO:0007605
name: androecium developmental stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the androecium defined by characteristic morphological\, structural\, histological or other visible features." [POC:curators]
is_a: PO:0007600 ! 3 floral organ development stages

[Term]
id: PO:0007606
name: gynoecium developmental stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the gynoecium defined by characteristic morphological\, structural\, histological or other visible features." [POC:curators]
is_a: PO:0007600 ! 3 floral organ development stages

[Term]
id: PO:0007607
name: sepal primordum visible
namespace: plant_growth_and_development_stage
def: "Stage of calyx development that begins when the sepal primordia arise." [POC:curators]
synonym: "stage 3 flower TAIR\:0000377" []
is_a: PO:0007603 ! calyx developmental stages

[Term]
id: PO:0007608
name: petal primordum visible
namespace: plant_growth_and_development_stage
def: "Stage of corolla development that begins when the petal or petal-stamen primordia arise." [POC:curators]
synonym: "stage 5 flower TAIR\:0000379" []
is_a: PO:0007604 ! corolla developmental stages

[Term]
id: PO:0007609
name: sepals 50% of final size
namespace: plant_growth_and_development_stage
def: "50% of the absolute size of the sepals." [POC:curators]
is_obsolete: true

[Term]
id: PO:0007610
name: sepals 100% of final size
namespace: plant_growth_and_development_stage
def: "100% of the absolute size of the sepals." [POC:curators]
is_obsolete: true

[Term]
id: PO:0007611
name: petal differentiation and expansion stage
namespace: plant_growth_and_development_stage
def: "Stage of corolla development defined by differentiation and expansion of petal." [POC:fz]
synonym: "stage 10 flower TAIR\:0000384" []
synonym: "stage 12 flower TAIR\:0000386" []
synonym: "stage 9 flower TAIR\:0000383" []
xref_analog: POC:fz
is_a: PO:0007604 ! corolla developmental stages

[Term]
id: PO:0007612
name: fully expanded petal
namespace: plant_growth_and_development_stage
def: "Stage of corolla development when petal is fully expanded." [POC:fz]
xref_analog: POC:fz
is_a: PO:0007604 ! corolla developmental stages

[Term]
id: PO:0007613
name: stamen primordum visible
namespace: plant_growth_and_development_stage
def: "Stage of androecium development that begins when the stamens or petal-stamen primordia arise." [POC:curators]
synonym: "stage 7 flower TAIR\:0000381" []
is_a: PO:0007605 ! androecium developmental stages

[Term]
id: PO:0007615
name: flower development stages
namespace: plant_growth_and_development_stage
def: "Stages of development of a flower defined by characteristic morphological\, structural\, histological or other visible features. " [POC:curators]
synonym: "flower development TAIR\:0000004" []
is_a: PO:0007021 ! plant structure development stage

[Term]
id: PO:0007616
name: 4 anthesis
namespace: plant_growth_and_development_stage
def: "The phase of a flower when pollen is presented and/or the stigma is receptive." [APWeb:glossary]
synonym: "stage 13 flower TAIR\:0000388" []
is_a: PO:0007615 ! flower development stages

[Term]
id: PO:0007617
name: 5 post anthesis
namespace: plant_growth_and_development_stage
def: "The phase of a flower after the pollen is presented and/or the stigma is receptive." [POC:curators]
synonym: "stage 16 flower TAIR\:0000391" []
is_a: PO:0007615 ! flower development stages

[Term]
id: PO:0007618
name: carpel primordium visible
namespace: plant_growth_and_development_stage
def: "Stage of gynoecium development that begins when the carpel primordia arise." [POC:curators]
is_a: PO:0007606 ! gynoecium developmental stages

[Term]
id: PO:0007619
name: ovule developmental stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the ovule defined by characteristic morphological\, structural\, histological or other visible features." [POC:curators]
is_a: PO:0007606 ! gynoecium developmental stages

[Term]
id: PO:0007620
name: ovule primordium visible
namespace: plant_growth_and_development_stage
def: "Stage of ovule development that begins when the ovule primordia arise." [POC:curators]
synonym: "ovule stage 1-I TAIR\:0000006" []
is_a: PO:0007619 ! ovule developmental stages

[Term]
id: PO:0007621
name: megagametophyte developmental stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the megagametophyte." [POC:curators]
comment: Although megaspore and megagametophyte development are normally separate\, one spore producing one gametophyte\, in some flowering plants a single gametophyte may be produced from two or four spores.
is_a: PO:0007620 ! ovule primordium visible

[Term]
id: PO:0007622
name: integument initiation stage
namespace: plant_growth_and_development_stage
def: "Stage of ovule development that begins when the integument primordia are visible." [POC:curators]
synonym: "ovule stage 2-II TAIR\:0000009" []
synonym: "ovule stage 2-III TAIR\:0000010" []
is_a: PO:0007620 ! ovule primordium visible

[Term]
id: PO:0007623
name: A megaspore mother cell enlarges
namespace: plant_growth_and_development_stage
def: "The stage of megagametophyte development when the megaspore mother cell enlarges." [POC:curators]
synonym: "ovule stage 2-I TAIR\:0000008" []
is_a: PO:0007621 ! megagametophyte developmental stages

[Term]
id: PO:0007624
name: B meiosis of MMC
namespace: plant_growth_and_development_stage
def: "The stage of megagametophyte development when the megaspore mother cell undergoes meiosis." [POC:curators]
synonym: "ovule stage 2-IV TAIR\:0000011" []
is_a: PO:0007621 ! megagametophyte developmental stages

[Term]
id: PO:0007625
name: C tetrad of megaspores
namespace: plant_growth_and_development_stage
def: "The product of meiosis of the megaspore mother cell." [POC:curators]
synonym: "ovule stage 2-V TAIR\:0000012" []
is_a: PO:0007621 ! megagametophyte developmental stages

[Term]
id: PO:0007626
name: D megaspore degeneration
namespace: plant_growth_and_development_stage
def: "The stage of megagametophyte development when non-functional megaspores degenerate." [POC:curators]
comment: In some plants more than one megaspore contributes to the megametophyte.
synonym: "ovule stage 3-I TAIR\:0000013" []
is_a: PO:0007621 ! megagametophyte developmental stages

[Term]
id: PO:0007627
name: E two nucleate megagametophyte
namespace: plant_growth_and_development_stage
def: "The stage of megagametophyte development when there are two nuclei." [POC:curators]
synonym: "ovule stage 3-II TAIR\:0000014" []
is_a: PO:0007621 ! megagametophyte developmental stages

[Term]
id: PO:0007628
name: F four nucleate megagametophyte
namespace: plant_growth_and_development_stage
def: "The stage of megagametophyte development when there are four nuclei." [POC:curators]
synonym: "ovule stage 3-IV TAIR\:0000016" []
is_a: PO:0007621 ! megagametophyte developmental stages

[Term]
id: PO:0007629
name: G eight nucleate megagametophyte
namespace: plant_growth_and_development_stage
def: "The stage of megagametophyte development when there are eight nuclei." [POC:curators]
comment: Some plnats do not form an eight nucleate megametophyte.
synonym: "ovule stage 3-V TAIR\:0000017" []
is_a: PO:0007621 ! megagametophyte developmental stages

[Term]
id: PO:0007631
name: embryo development stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the embryo." [TAIR:ki]
synonym: "embryonic TAIR\:0000374" []
is_a: PO:0001170 ! seed development stages

[Term]
id: PO:0007632
name: seed maturation stage
namespace: plant_growth_and_development_stage
def: "Stage during which the seed storage products (storage proteins\, lipids and starch) are being accumulated\, either in the cotyledons or in the endosperm. Also\, LEA proteins are accumulated and subsequentially\, desiccation tolerant state is reached at the end of this stage." [TAIR:ki]
synonym: "seed maturation TAIR\:0000173" []
is_a: PO:0001170 ! seed development stages

[Term]
id: PO:0007633
name: endosperm development stages
namespace: plant_growth_and_development_stage
def: "Stages of development of the endosperm." [TAIR:ki]
is_a: PO:0001170 ! seed development stages

[Term]
id: PO:0009012
name: plant growth and development stage
namespace: plant_growth_and_development_stage
def: "The succession of changes leading from the zygote to the mature plant. " [Poc:curators ""]
synonym: "Arabidopsis growth" [TAIR:0000205]

[Term]
id: PO:0009075
name: plant ontology
namespace: plant_structure
def: "OBSOLETE. A controlled vocabulary to describe the various plant parts and the growth and developmental stages." [Poc:curators]
is_obsolete: true

[Term]
id: PO:0021002
name: calyx absolute size
namespace: plant_growth_and_development_stage
def: "The proportion of the absolute size reached by the calyx" [POC:curators]
is_obsolete: true

[Term]
id: PO:0021003
name: calyx relationship
namespace: plant_growth_and_development_stage
def: "The stages of development of the calyx with respect to the rest of the bud" [POC:curators]
is_obsolete: true

[Term]
id: PO:0021004
name: inflorescence initiation stage
namespace: plant_growth_and_development_stage
def: "Stage of inflorescence development marked by the formation of the inflorescence meristem on a vegetative branch." [POC:fz]
xref_analog: POC:fz
is_a: PO:0001083 ! inflorescence development stages

[Typedef]
id: part_of
name: Part of