tapetum

Term Information

Accession
PO:0025313
Aspect
plant anatomy
Synonyms
exact: 絨毯組織、タペート組織 (Japanese)
exact: tapeto (Spanish)
Definition
A portion of ground tissue (PO:0025059) that is the inner-most layer of a sporangium wall (PO:0025306). [source: ISBN:0471244554, ISBN:9780003686647, ISBN:9780070588493]
Comment
May function in providing nutrition to developing sporocytes or pollen. May have one or more layers of cells. May break down as spores mature. A tapetum does not develop in some plants, such as Psilotum. In angiosperms, the tapetum develops from one of the parietal layers. In non-seed plants, the tapetum may develop from the outer cells of archesporium or from the inner-most layer of the sporangium wall. The tapetum may be one of two types ameboid or secretory/glandular.

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External References

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