Gametophore

Gametophores are prominent structures in seedless plants on which the reproductive organs are borne.[1] The word gametophore (more accurately gametangiophore) is composed of the greek ‘gamete-,’ referring (loosely) to gametangia and ‘-phore’ (Greek Φορά, "to be carried").[2] In mosses, liverworts and ferns (Archegoniata), the gametophores support gametangia (sex organs, female archegonia and male antheridia).[3] If both archegonia and antheridia occur on the same plant, it is called monoicous. If there are separate female and male plants they are called dioicous.

Single gametophore of Physcomitrella patens

In Bryopsida the leafy moss plant (q. v. "Thallus") is called gametophore. It is the adult form of the haploid gametophyte and develops from the juvenile form, the protonema, under the influence of phytohormones (mainly cytokinins).[3] Whereas the filamentous protonema grows by apical cell division, the gametophore grows by division of three faced apical cells.

See also

Rhizoid

References
  1. Campbell, Neil A.; Reece, Jane B. (2008). Biology (8th ed.). 1301 Sansome St., San Fransisco, CA 94111: Pearson Benjamin Cummings. pp. 602–609. ISBN 978-0-8053-6844-4.{{cite book}}: CS1 maint: location (link)
  2. Bryological Glossary
  3. Reski, R. (1998). "Development, Genetics and Molecular Biology of Mosses". Botanica Acta. 111 (1): 1–15. doi:10.1111/j.1438-8677.1998.tb00670.x.


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