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10 - a fungi break down complex molecules in wood into...

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Lecture 16: Fungi: 2/12/10 A. Why Fungi is Studied 1. Nutrients for plants 2. Carbon Cycle 3. Economic impacts 4. Model organisms for genetics B. How Fungi is Studied 1. Morphological a. Fungi have two simple growth forms: single celled forms (yeast) and multicellular (mycelia) 2. Reproductive 3. Evaluating C. Lignin Degradation 1. Fungi can break down lignin with the enzyme lignin peroxidase 2. Fungi break down lignin to get to cellulose , which they can live on, but cannot harness oxidation of lignin to produce ATP or live directly off cellulose 3. Cellulose is converted to glucose D. Fungi's Facilitation 1. of Growth in Plants a. presence of Mucorrhizal fungi in plant roots which lead to faster plant growth 2. in Speed of Carbon Cycle on Land
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Unformatted text preview: a. fungi break down complex molecules in wood into reusable organic compounds b. CO2 released from fungi as a result of cellular respiration E. Ectomycorrhizal Fungi (EMF) 1. Form a dense network of hyphae that cover a plant's roots but do not enter the root cells. 2. Hyphae (filaments that make up mycelium, most haploid) extend into the soil 3. Provide nitrogen (useful for amino acids--> proteins) and phosphate ions to the host plant and receive sugars and other complex carbon compounds in return F. Arbuscular Micorrhizal Fungi (AMF) 1. Do not give nitrogen, but provide phosphorous 2. Hyphae extend into plant cells and directly contact the plasma membrane of the plant cell...
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