Chapter 31 - Chapter 31 Nutrition and Fungal...

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Chapter 31 Nutrition and Fungal Lifestyles -Heterotroph -Nutrients through absorption -Secrete Enzyme to break down complex molecules Body Structure -Networks of myclia, branches of hyphae -Septa allow cell to cell movement -Coenocytic lack septa -Mycorrhizal symbiotic with plants Sexual Reproduction -Cytoplasmic fusion -Nuclear fusion -short diploid phase from karyogamy Asexual Reproduction -Grow rapidly -Yeasts -Deuteromycetes no known sexual stage The origin of fungi -Common ancestor with animal -Unicellular and bore flagella The move to land -Symbionts with plants -Early colonizer of land Chytrids -Saprobic -Parasitic -Found in freshwater and terrestrial habitats -Flagellate spores
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Zygomecetes -Produced zygoesporangia -Unicellular parasite Glomeromycetes -Symbiotic with plant -Arbuscular mycorrhizae Ascomycetes -asexually internally in sacs (asci) -ascocarps Basidiomycetes -Decomposers of wood -Elaborate fruiting body called basidiocarp Decomposer Symbionts -Mycorrhizae increase plant productivity -enable digestion of plant tissue -Lichens Pathogens -Parasites -Disease Practical Uses -Food -Antibiotics
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