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Mutualism09 - Very important in water uptake drought...

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BSCI 106 Outline 9 Fall 2009 p. 1 Dr. Sara Via Lecture 9 Species interactions IV - Mutualism A. In a mutualism (same as symbiosis) both participating species benefit (+/+) 1. Nitrogen fixation by Rhizobium (bacteria) Bacteria take N2 from air ammonium 2. Mycorrhizae (fungi) on plant roots Mycorrhizae are fungi that infect plant roots Aid in water, nutrient uptake Inside (endomycorrhizae) Aid in P uptake by extending way past root hairs Outside (Ectomycorrhizae)
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Unformatted text preview: Very important in water uptake, drought resistance 3. Pollination required by many plants flowers evolved to attract pollinators! BSCI 106 Outline 9 Fall 2009 p. 2 Dr. Sara Via 4. Corals and Zooxanthellae Q: Why do coral need the zooxanthellae? Other marine invertebrates don’t use them Zooxanthellae (algae) - Fix carbon Coral - Acquire nitrogen Corals are victims of global warming: In warming water, zoothanthellae leave “Coral Bleaching”- corals die...
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