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2005_campbl31 - Fungi along with bacteria are the principle...

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1 Chapter 31: Fungi Variations on the Fungi Theme Mushrooms are sexual structures (fruiting bodies) Fungi which do not have sex (including most molds and yeasts) are described as imperfect fungi, or deuteromycete The bulk of fungal mass is found within their food Fungal Ecology Fungi along with bacteria are the principle decomposers The secrete exoenzymes to digest nutrients extracellularly, which are then brought into cells directly across plasma membranes Fungi (especially club fungi) are virtually the only organism capable of breaking down lignin (the stuff that makes wood woody) Some fungi act as disease-causing organisms of animals and, especially, of plants (mycosis = fungus-caused disease) Fungi produce antibiotics (e.g., Penicillin) which they use to limit ecological competition from bacteria We take advantage of fungus-mediated decomposition in the production of bread, beer, wine, cheeses, and soy sauce! Fungi Phyla All “fungi are heterotrophs that feed by adsorption.” p. 608, Campbell & Reece (2005) Recall that fungi have chitin cell walls Also, befitting terrestrial adapted
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