Details of Changes to Release 20

Go back to main page: Release_20

Includes all revisions from 1761 and on.

New terms

• multicellular trichome tip (PO:0025535):

comment:

• plant cuticle ridge (PO:0025536): A portion of plant cuticle (PO:000022) that forms a ridge, may be overlayed with epicuticular wax (PO:0025388).

Comment: The plant cuticle ridges are mainly cutin (PO:0025385).

• adventitious shoot axis PO:0025534: A shoot axis (PO:00025029) that develops in an unusual place. develops from a bud (narrow synonym adventitious bud )

• plant sap (new PO:00255380): A portion of plant substance (PO:0025161) that is an aqueous solution which may contain sugars, hormones, mineral elements and/or other nutrients.

Comment: plant sap should not be confused with latex or resins.

• xylem sap (new PO:0025539): A plant sap (PO:0025538) that is an aqueous solution which may contain mineral elements, nutrients, and plant hormones, and is transported from the root system (PO:0025025) toward the leaves through the tracheary elements (PO:0000290) of the xylem.

Transport of sap in xylem is characterized by movement from the roots toward the leaves.

• phloem sap (new PO:0025539): A plant sap (new PO:0025538) that is an aqueous solution which may contain sugars, mineral elements, and plant hormones, and is transported through the phloem sieve elements (PO:0025406).

Obsolete terms

paraclade was merged into primary inflorescence branch