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gametophye and sporophyte

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gametophye and sporophyte

Postby hiro » Tue May 24, 2005 1:24 pm

for green algae and mushroom...what is their dominant form of life? gametophyte or sporophyte?
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Postby MrMistery » Tue May 24, 2005 6:05 pm

Most green algae are haplobiontic organisms(dominant genration is gametophyte). The sporophyte is represented only by the egg cell. Some algae(like Spirogira) are haplobiontic(they have both gametophyte and sporophyte and we can not say that one is dominant over the other)
Don't remember about those mushrooms though...
PS: topic moved to botany forum
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Postby clarence » Wed May 25, 2005 7:04 am

Fungi are not considered plants because they lack chloroplasts (with one exception), their body construction is filamentous, and many of their metabolic pathways are not homologous with corresponding pathways in plants. In other words, the terms "gametophyte" (by definition a plant [-phyte] that produces the gametes [gameto-]) and "sporophyte" can't be used to refer to the life cycle of fungi.

About the most dominant part of the life cycle, in Basidiomycetes (mushrooms, puffballs, etc.) the "dominant" one is the basidiocarp "stage", the "fruiting" body that has gills underneath for spore growth and protection.
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Postby MrMistery » Wed May 25, 2005 8:26 pm

Oh yes you are right
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