Details of Changes to Release 20

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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. Comment: 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).
  • bundle sheath cell (PO:0025541): A ground tissue cell (PO:0000076) that is part of a bundle sheath (PO:0006023). part_of bundle sheath
  • bundle sheath chlorenchyma cell (PO:0025542): A chlorenchyma cell (PO:0000076) that is part of a bundle sheath (PO:0006023).
  • tapetum cell (PO:0025543): A plant cell (PO:0009002) that is part of the tapetum (PO:0025313). exact synonym: tapetal cell. comment: The tapetum is the inner-most layer of a sporangium wall (PO:0025306).
  • microsporangium tapetum cell (PO:0025544): A tapetum cell (PO:0025543) that is part of a microsporangium tapetum (PO:0025314). part_of a microsporangium tapetum; exact synonym: tapetal cell
  • anther wall tapetum cell (PO:0025545): A microsporangium tapetum cell (PO:0025544) that is part of the anther wall tapetum (PO:0009071). part_of the anther wall tapetum; exact synonym: anther wall tapetal cell

Obsolete terms

paraclade was merged into primary inflorescence branch

GO Requests

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