BIO 1305 Lecture Notes - Lecture 8: Karyogamy, Heterokaryon, Nephron
16 Dec 2017
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Document Summary
Lichen (mutualistic endosymbiotic): describe the body structure of fungi. Fungi consist of mycelia, networks of branched hyphae adapted for absorption. Hyphae consist of tubular cell walls surrounding the plasma membrane and cytoplasm of cell. The morphology of multicellular enhances their ability to grow into and absorb nutrients from their surroundings. Cell walls made of chitin, a strong by flexible polysaccharide. Better absorption of nutrients and prevent cells from bursting. Two types of fungi form: coencytic & septa (allows transfer of information- nuclei, ribosomes, mitochondria) The have endosymbiotic relationships with plants that are mutually beneficial. Some fungi have specialized hyphae that allow them to feed on living animal or haustoria that allow them to penetrate the tissues of their host (specialized hyphae). Ectomycorrhizal: form sheaths of hyphae over a root and also grow into the extracellular spaces. Arbuscular mycorrhizal: extend branching hyphae through the cells walls of root cells and into tubes formed by pushing inward into the root cell membrane.
