Term Information

Accession

PO:0025473

Aspect

plant anatomy

Synonyms

None

Definition

A portion of reaction wood (PO:0025472) found on the lower side of a shoot axis (PO:0025029) that is or was angled away from vertical and that has as parts heavily lignified tracheids (PO:0000301) with a specialized S2 layer that contains more lignin and has a larger (more horizontal) microfibril angle. [source: ISBN:3540411739, PO_REF:00012]

Comment

Develops as a response to gravity (compression) and may function in restoring a stem (PO:0009047) or branch (PO:0025073) that is leaning to its original position. Found in gymnosperms.

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Term Lineage

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External References

None.