Details of Changes to Release 21

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• Includes all revisions from 2228 and on.

New PAE terms:

• leaf lamina tip (PO:0025589): a leaf tip (PO:0025142) area that is the distal portion of the leaf lamina (PO:00200039). Comment: This is the portion of the leaf lamina (PO:0020039) that is furthest away from the stem (PO:0009047).

• receptacle pith (PO:0025590): A portion of pith (PO:0006109) that is part of a receptacle (PO:0009064). part_of receptacle.

• receptacle cortex (PO:0025591): A portion of cortex (PO:0005708) that is part of a receptacle (PO:0009064).

• phyllome founder cell (PO:0025586): A plant cell (PO:0009002) that is part of the phyllome anlagen (PO:0025430).

• vascular leaf founder cell (PO:0025592): A phyllome founder cell (PO:0025586) that is part of a vascular leaf anlagen (PO:0025431).

New PSDS terms:

• vascular leaf development stage (PO:0025570): A leaf development stage (PO:0001051) which begins with the onset of the vascular leaf initiation stage (PO:0001051) and ends with the termination of the vascular leaf senescence stage (PO:0001054).

• multi-tissue plant structure development stage (PO:0025571): A plant structure development stage (PO:0009012) that has as primary participant a multi-tissue plant structure (PO:0025496).

• non-vascular leaf development stage (PO:0025573): A leaf development stage (PO:0001050) that begins with the non-vascular leaf initiation stage and ends with the non-vascular leaf senescence stage. not added yet

• vascular leaf primordium polarity determination stage (PO:0025570): A vascular leaf initiation stage (PO:0001051) during which the vascular leaf primordium (PO:0004725) develops an adaxial side (PO:0004726) and an abaxial side (PO:0004725).

Renamed terms

No substantial change in the meaning of the definition

Format 'new_name'(PO:ID); was:'old_name'

Renamed PAE terms

• vascular leaf primordium adaxial side (PO:0004726); was: 'adaxial side of leaf primordium'

• vascular leaf primordium abaxial side (PO:0004725); was: 'abaxial side of leaf primordium'

• vascular leaf adaxial meristem (PO:0025401); was 'leaf adaxial meristem'

• vascular leaf abaxial meristem (PO:0025403); was: leaf abaxial meristem (PO:0025403)

Renamed PSDS terms

• vascular leaf initiation stage (PO:0001051); was: 1 leaf initiation stage

• vascular leaf expansion stage (PO:0001052); was: 2 leaf expansion stage

• mature vascular leaf stage (PO:0001053); was: 3 leaf fully expanded stage

• vascular leaf senescence stage (PO:0001054); was: 4 leaf senescence stage

• vascular leaf anlagen formation stage (PO:0001003); was: formation of leaf founder cells

• vascular leaf primordium formation stage (PO:0001019); was: formation of leaf primordium stage

• formation of vascular leaflet primordia stage (PO:0004500); was: formation of leaflet primordia stage

• rapid elongation of vascular leaf lamina stage (PO:0001023); was: rapid elongation of leaf blade stage

• XXXX (PO:0001024); was: rapid elongation of leaf sheath stage (PO:0001024)

• XXXX (PO:0001021); was: ligule primordial stage (PO:0001021)

• XXXX (PO:0001020); was: hood-shaped primordium stage (PO:0001020)