lecture_notes_12_7_07

lecture_notes_12_7_07 - Lecture Notes 12-7 -07 Fungi,...

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Lecture Notes 12-7 -07 Fungi, Sponges, Cnidaria Fungi, then on to the Animals Fungi Mostly multicellular (some single-cell forms, such as yeasts) heterotrophs. . Fungi absorb food from their surroundings in the form of small organic molecules. Fungi secrete exoenzymes into the food. Multicellular forms have a body composed of small filaments called hyphae (hypha) , which form an interwoven mat called a mycelium . The hyphae are often hidden in soil. Cells have walls containing chitin Often what we recognize as a fungus—mushroom, toadstool, etc, is the reproductive structure at the tip of extensive hyphal mats. Fruiting Body Not all fungal groups produce these structures Fruiting bodies produce spores Some fungi feed on dead organic matter --saprobes-- others form mutualistic relationships, others are parasitic, and some are predators--trapping microscopic organisms The Chytrids are found in lakes and in soil, and are different from other fungal groups in that they have flagellated spores The Zygomycetes include “molds” that rot produce. The Glomeromycota include a type of mycorrhizal fungi The Ascomycetes are named for their fruiting bodies, containing small sacs The Basidiomycetes are the Club Fungi, also named for the structure of their
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This note was uploaded on 04/29/2008 for the course BIOCORE 301 taught by Professor Howell during the Fall '07 term at Wisconsin.

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lecture_notes_12_7_07 - Lecture Notes 12-7 -07 Fungi,...

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