Ch 31 - Fungi (1 slide per page)-1

11 campbell et al 31 2 zygomycetes 1000 species known

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Unformatted text preview: , & mutualists • Help cattle breakdown plants in their stomach • Responsible for some amphibian declines Figure 31.11 (Campbell et al) 31 2. Zygomycetes ~1000 species known • Many fruit & bread molds • Aseptate hyphae (thus many nuclei in same “cell” (coenocytic) • Asexual reproduction during good times (and thus produces asexual spores) • Sexual reproduction when conditions bad (e.g. food runs out) • Different strains’ hyphae fuse (i.e. plasmogamy) • Form a thick-walled structure (Zygosporangium) btwn hyphae which produces sexual spores when conditions improve See Figure 31.13 (Campbell et al) but DO NOT need to remember all details of this lifecycle 32 3. Glomeromycetes ~160 species known • Most form Endomychorrhizae (arbuscular) • Associated w/ ~90% of all plant spp! • Branched hyphae tips (arbuscules) penetrate root cell walls • Take some glucose • Give some water & minerals Figure 37.13 (Campbellet al.) Figure 31.15 (Campbellet al.) 33 Ecto- vs. Endomycorrhizae Ectomycorrhizae • Cover root in dense mat • Hyphae go btwn cells but do not penetrate cell wall • Mostly Basidiomycota and Ascomycota, but a few are Zygomycota. Figure 37.13 (Campbellet al.) 34 4. Ascomycetes (Sac Fungi) • > 65K species • Includes unicellular yeasts and many multicellular species (e.g. penicillium, morels, truffles) • Septate hyphae • Sexual spores produced in sac-shaped fruiting body (ascocarp) “Orange peel fungus” Morel Truffle Penicillium Figure 31.16(Campbell et al) See Figure 31.17 (Campbell et al) but DO NOT need to remember all details of this lifecycle 35 4. Ascomycetes (Sac Fungi) Asexual spore producing structures Ascocarp Sexual spore producing structures Asci w/ascospores 36 Maiden veil fungus 5. Basidiomycetes (Club Fungi) • ~30K species •...
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This note was uploaded on 02/12/2014 for the course BIOLOGY 2011 taught by Professor Woo during the Fall '10 term at University of Central Florida.

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