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Fungi. Chapter 31. Fungal Structure. Hyphae & mycelium Cells walls made of chitin Coenocytic or septate. Roles of Fungi. External decomposers – exoenzymes Saprobic Parasitic Mutualistic Mycorrizhae. Relationship with Humans. Disease Medicine Cooking. Asexual Reproduction.
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Fungi Chapter 31
Fungal Structure Hyphae & mycelium Cells walls made of chitin Coenocytic or septate
Roles of Fungi • External decomposers – exoenzymes • Saprobic • Parasitic • Mutualistic • Mycorrizhae
Relationship with Humans Disease Medicine Cooking
Asexual Reproduction Deuteromycetes Budding Mitotic production of spores Yeast, mold, most parasitic fungi can reproduce this way.
Chytridiomycota Diverged earliest in fungal evolution May be paraphyletic with Zygomycota Mostly aquatic Has zoospores
Zygomycota Example: bread mold, most mold on produce Reproduces sexually & asexually Forms zygosporangia
Glomeromycota Ecologically significant - mycorrizhae May have helped early plants Important to lumber industry
Ascomycota • Examples include truffles, and the yeast used for bread & beer. • Can reproduce asexually using conidia. • Reproduces sexually using ascocarp.
Basidiomycota Examples include mushrooms, shelf fungi, rusts & smuts. Almost never reproduces asexually.
Basidiomycota Reproduces sexually using a basidium.
Lichen Break down rocks into soil Often first life on new land Pollution indicators Crustose, fruticose, & foliose
Lichen Image removed – Fig. 31.24 on p. 621. Actually millions of photosynthetic algae or cyanobacteria surrounded by fungal hyphae. Named as single organisms