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secondary xylem

Term Information

Accession
PO:0005848
Name
secondary xylem
Ontology
plant_anatomy
Synonyms
portion of secondary xylem tissue (exact), wood (exact), xilema secundario (Spanish, exact), 二次木部 (Japanese, exact)
Alternate IDs
None
Definition
A portion of xylem (PO:0005352) tissue that develops from a vascular cambium (PO:0005598). Source: ISBN:0471245194
Comment
Secondary xylem develops as part of secondary growth (GO:0080117). Secondary xylem is the wood of gymnosperm and dicot angiosperm trees, shrubs, and lianas. May be organized into axial (PO:0025410) and ray (PO:0025411) systems. Secondary xylem is often part of a shoot axis (PO:0025029) or a root (PO:0009005) but may occur in other organs. Some monocots have a primary thickening meristem (PO:0005039), located near the shoot apical meristem (PO:0020148), that gives the appearance of secondary growth and may produce lignified tissue that appears woody but is not composed of secondary xylem. Tracheary elements in secondary xylem (PO:0000290) have lignified cell walls with secondary thickening and are dead at maturity.
Subset
TraitNet
Feedback
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Parents of secondary xylem (PO:0005848)
subject[Reorder by subject] relation[Reorder by relation] object[Reorder by object]
secondary xylem [is_a relation] is_a  xylem (PO:0005352)
secondary xylem [is_a relation] is_a  secondary vascular tissue (PO:0025409)
Children of secondary xylem (PO:0005848)
subject[Reorder by subject] relation[Reorder by relation] object[Reorder by object]
growth ring (PO:0004514) [is_a relation] is_a  secondary xylem
secondary xylem development stage (PO:0025427) [RO:0000057 relation] RO:0000057  secondary xylem
secondary xylem parenchyma (PO:0004532) [BFO:0000050 relation] BFO:0000050  secondary xylem
early wood (PO:0004515) [is_a relation] is_a  secondary xylem
heartwood (PO:0004512) [is_a relation] is_a  secondary xylem
secondary xylem vessel (PO:0025451) [BFO:0000050 relation] BFO:0000050  secondary xylem
secondary xylem volumetric density (TO:1000002) [RO:0000052 relation] RO:0000052  secondary xylem
growth ring boundary (PO:0004517) [is_a relation] is_a  secondary xylem
late wood (PO:0004516) [is_a relation] is_a  secondary xylem
reaction wood (PO:0025472) [is_a relation] is_a  secondary xylem
sapwood (PO:0004513) [is_a relation] is_a  secondary xylem
secondary xylem tracheary element (PO:0025445) [BFO:0000050 relation] BFO:0000050  secondary xylem
PO_GIT
434
164