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gametophyte

Translation
gametophyte
—gametophytic /geuh mee'teuh fit"ik, gam'i-/, adj.
/geuh mee"teuh fuyt', gam"i-/, n. Bot.
the sexual form of a plant in the alternation of generations. Cf. sporophyte.
[1890-95; GAMETO- + -PHYTE]

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In certain plants, the sexual phase (or an individual representing the phase) in the alternation of generations.

The alternate, nonsexual phase is the sporophyte. In the gametophyte phase, male and female organs (gametangia) develop and produce eggs and sperm (gametes), which unite in fertilization (syngamy). The fertilized egg (zygote) develops into the sporophyte, which produces numerous single-celled spores, which in turn develop directly into new gametes.

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▪ plant stage
      in certain plants, sexual phase (or an individual representing the phase) in the alternation of generations—a phenomenon in which two distinct phases occur in the life history of the plant, each phase producing the other. The alternate, nonsexual phase is the sporophyte.

      In the gametophyte phase, male and female organs (gametangia) develop and produce eggs and sperm (gametes), which unite in fertilization (syngamy). The fertilized egg (zygote) develops into the sporophyte phase, which produces numerous unicellular spores. These, in turn, develop directly into new gametes. Almost the entire life cycle of many algae and fungi is gametophyte; in others it is almost all sporophyte. See also sporophyte.

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Universalium. 2010.

  
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