Fungi. Characteristics eukaryotic multicellular (except yeasts) heterotrophic by absorption...
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Transcript of Fungi. Characteristics eukaryotic multicellular (except yeasts) heterotrophic by absorption...
![Page 1: Fungi. Characteristics eukaryotic multicellular (except yeasts) heterotrophic by absorption (saprophytes – feed on dead organic matter) reproduce sexually.](https://reader036.fdocuments.net/reader036/viewer/2022081519/56649f175503460f94c2d6ab/html5/thumbnails/1.jpg)
Fungi
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Characteristics• eukaryotic• multicellular (except yeasts)• heterotrophic by absorption
(saprophytes – feed on dead organic matter)• reproduce sexually & asexually• no locomotion• cell walls made of chitin• classified by sexual reproduction• decomposers
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• hyphae – rootlike structures for absorbing nutrients
• mycelium - all the hyphae in a fungus, collectively
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Fungal structure
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A. Phylum Oomycota
• protist-like fungi• reproduce sexually by oospores• reproduce asexually by sporangia• ex: water molds
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B. Phylum Zygomycota
• conjugation fungi• reproduce sexually by conjugation - • + & - mating strains of hyphae fuse to form a
zygospore• reproduce asexually by sporangia• ex: Rhizopus (black bread mold)
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Zygomycota life cycle
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Rhizopus
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C. Phylum Ascomycota
• sac fungi• sexually reproduces by ascospores• asexually reproduces by conidia or budding• ex: Peziza (cup fungus), morels, yeasts
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Ascomycota life cycle
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Ascomycetes
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Yeasts budding
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D. Phylum Basidiomycota
• club fungi• sexually reproduces by basidiospores• asexually reproduces by sporangia or not at all• ex: Agaricus (mushroom), puffballs, Amanita (death cap mushroom)
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Basidiomycota life cycle
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E. Phylum Deuteromycota
• imperfect fungi• no known sexual reproduction• asexually reproduce by conidia• ex: ringworm fungus, athletes’s foot fungus
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Symbiotic relationships in fungi:
1) Lichens – fungus & alga living together
2) Mycorrhizae – fungi & tree roots living together
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Lichens
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Importance of fungi:
Helpful• make antibiotics (penicillin)• used in cheese-making (bleu cheese)• used in baking industry (yeast)• used in alcohol industry (yeast)• used as a food source• decomposers
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Importance of fungi:
Harmful:• cause disease in humans• cause disease in crops• cause allergies• spoil food