INTRASPECIFIC VARIATION IN SPORE-SIZE OF HOMOSPOROUS FERNS AND ITS IMPLICATIONS ON FERN MATING SYSTEMS

Abstracts

In the homosporous ferns, sex determination is delayed until spore germination. Published data reveal a wide variety of adaptations that help avoid intragametophytic selfing, despite the potential bisexuality or hermaphroditism of their gametophytes. The major developmental adaptation appears to be asynchronous germination of spores, originating even from a single sporophyte. Several studies have entertained the possibility of differential capacities of fern spores as a causative factor, suspecting some kind of a "genetic" basis for such inequality.

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Posted July 21, 2018 04:16