01:119:116 Lecture Notes - Lecture 4: Hypha, Mating Type, Glomeromycota
22 Apr 2016
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Unikont diversity i: origin - opisthokonts; unicellular, flagellated ancestor animals/nucleariids/fungi chytrids/other fungi; 1-1. 5 bya, colonization of land. Cyanobacteria, algae, small heterotrophs (including fungi: diverse fungi lineages. General characteristics: nearly all multicellular (from ancestors, not photosynthetic (no chlorophyll, no chloroplasts not plants, heterotrophs. C. 3. secrete hydrolases absorb organic molecules hypha: digestive enzyme secreted substrate digested organic matter absorbed: 3 lifestyles. Decomposers - absorb nutrients from non-living organic material. Parasites - absorb nutrients from cells of living hosts. Mutualists - absorb nutrients from living host organisms, but both benefit: chitinous cell wall. Body structure in multicellular fungi (more common: hyphae - long, branched, threadlike filaments; basic building block of fungal body; tubular cell wall surrounding plasma membrane; allow fungus to expand to new food source. Coenocytic hypha: mycelium - tangled mass of hyphae; feeding network that grows around and within food source, reproductive structures - most fungi produced via spores.
