Details of Changes to Release 21

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Includes all revisions from xxxx and on.

New PSDS terms:

• 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).

• 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).

• non-vascular leaf development stage (new PO:id): 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 PSDS terms

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

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

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