megaspore

views updated Jun 08 2018

megaspore The larger of two kinds of spore produced by heterosporous ferns, or the first cell of the female gametophyte generation of such ferns and seed plants (angiosperms and gymnosperms). In angiosperms, it is one of 4 haploid cells formed from a megasporocyte during meiosis, the other 3 degenerating. The megaspore of angiosperms divides to produce the female gametophyte (embryo sac).

megaspore

views updated May 23 2018

megaspore

views updated May 08 2018

megaspore See SPORE.

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