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Unformatted text preview: The three groups are neither related to the fungi nor to each other, but they have in common heterotrophy and a sporangia form in their life cycle. The myxomycetes are reproductively more advanced than the cellular slime molds and form a true plasmodium that can be several centimeters in diameter and look to the untrained eye like a patch of yellow vomitus spewed over a decaying log on the forest floor. The plasmodium is multinucleate and diploid. When food supplies are limited or the environment dries, the plasmodia cease their streaming and may form thick-walled structures called sclerotia (singular, sclerotium) in which the protoplasm can withstand adverse environmental conditions. Growth is resumed with the return of more favorable circumstances. Both asexual and sexual reproduction occurs, but the initiation clues to each process remain obscure. Under some conditions, the plasmodium produces erect sporangiophores with sporangia obscure....
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- Fall '08