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13 Fungi Notes - Biol 127 Fungi and Fungal Diseases Ch 11 p...

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Biol 127 Fungi and Fungal Diseases Ch 11: p. 319-326 Ch 13: p. 388-389 Ch 19: p. 588-589, 590 Mycology is the study of fungi - Fungi include - Yeasts - Molds - Mushrooms, morels, puffballs, tree ears - Rusts, smuts - Medical mycology is the study of medically important fungi and the diseases they cause - Molds typically grow as filamentous hyphae (hypha) - Hyphae form a visible mass called a mycelium - Yeasts – round/oval, unicellular organisms - Form colonies on laboratory media Fungi share several characteristics What Kingdom? [Fig 9-5] - Eukaryotic organisms - Most are multicellular; Some are unicellular - Heterotrophic metabolism - What’s a heterotroph? - What’s it different from? - Saprobes – get nutrients from - Secrete enzymes; absorbtive nutrition - When pathogenic, are parasites - Have a cell wall, with most containing chitin - CHO polymer of acetylglucosamine - Gives rigidity to cell wall; keeps it from bursting Hyphae can be septate or non-septate - Septate – have crosswalls - Septa typically have pores - Non-septate – have no crosswalls - Coenocytic – have >1 nucleus per cell - Hyphae grow at the tips - Hyphae can be branched or unbranched - These characteristics are relevant to identification and classification Fungal growth - Slow growers, compared to bacteria - Thrive in moist environments - Oxygen – typically aerobes; Exception?
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13 Fungi Notes - Biol 127 Fungi and Fungal Diseases Ch 11 p...

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