BIO 181 Study Guide - Quiz Guide: Glomeromycota, Chytridiomycota, Plasmogamy
7 Jan 2019
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Document Summary
Motile zoospores only fungi with flagella, and therefore, the only fungi with true motility. Primarily aquatic (rest of fungi are primarily terrestrial) Likely either a sister group to other fungi or a paraphyletic basal assemblage. Fossils resembling modern chytrids date back as far as about 400 mya. Chytrids may give us a good picture of what the ancestors of all fungi were like. Some forms have alternation of generations also: phylum zygomycota zygomycetes. Hyphae lack septa, except in reproductive structures, which has multiple nuclei. No dikaryotic hyphae because of the presence of plasmogamy and karyogamy together, followed by zygosporangium formation, then followed by meiosis when conditions are right. During sexual reproduction, the meiospores made in zygosporangia. Specialized, thick-coated microscopic structures that protect the diploid (zygotic) cells inside. Environmental signal of some sort sparks the zygotic cells to undergo meiosis, forming meiospores and breaking open the zygosporangium. More commonly seen than sexual reproduction for this group.
