Bis2CF10.Lecture24

Bis2CF10.Lecture24 - Lecture 24 FUNGI LICHENS...

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Unformatted text preview: Lecture 24 FUNGI: LICHENS, BASIDIOMYCETES Last: dikaryotic cycle, ascomycetes Lichens Parasitic basidiomycete lines: rusts and smuts Holobasidiomycetes: mushrooms, etc. Next: animals, midterm Absorptive heterotrophy Chitin walls Sporangium with rhizoids and chitinous wall Haploid life cycle zoospore Allomyces: alternation of generations zygosporangium alternation of generations? paraphyletic! paraphyletic! Loss of motile cells Terrestrial form mycorrhizae Dikarya Septate hyphae Dikaryotic stage “Hemiascomycetes” Saccharomycetes Taphrinomycetes Taphrina Euascomycetes Saccharomyces yeasts secondarily unicellular Dimorphic: hyphal and yeast-like stages ascocarp ASCOMYCOTA ascus; conidia/budding? asci ASCOCARP LICHENS LICHENS Reindeer “moss” (Cladonia) LICHENS Epiphytic crustose foliose fruticose Cross-section of lichen soredium BASIDIOMYCETES Absorptive heterotrophy Chitin walls Sporangium with rhizoids and chitinous wall Haploid life cycle zoospore Allomyces: alternation of generations zygosporangium alternation of generations? paraphyletic! paraphyletic! Loss of motile cells Terrestrial form mycorrhizae Dikarya Septate hyphae Dikaryotic stage FAIRY RING CLAMP CONNECTIONS what might be expected without clamps CLAMP CONNECTIONS what might be expected without clamps Fossil hyphae with clamp connections (Carboniferous, 300 MY) RUSTS Pucciniomycetes SMUTS Ustilaginomycetes Holobasidiomycetes Mushrooms etc. Multicellular dikaryotic fruiting structures Mostly parasites on angiosperms BASIDIOMYCOTA basidium; clamp connections? WHEAT RUST LIFE CYCLE (Puccinia graminis) spermatium 1n n+n asexual loop 1n 2n n+n WHEAT RUST LIFE CYCLE (Puccinia graminis) CORN SMUT LIFE CYCLE (Ustilago) huitlacoche RUSTS Pucciniomycetes SMUTS Ustilaginomycetes Holobasidiomycetes Mushrooms etc. Multicellular dikaryotic fruiting structures Mostly parasites on angiosperms BASIDIOMYCOTA basidium; clamp connections? Auricularia 木耳 Tremella “Jelly fungi” Mushrooms etc. HOLOBASIDIOMYCETES Puffball Stinkhorn Wood-degrading fungi Serpula: dry rot Wood-degrading fungi Bird’s nest fungus VESICULAR-ARBUSCULAR ENDOMYCORRHIZAE Vesicle Arbuscule Liverwort and symbiotic fungus (endomycorrhizae) ECTOMYCORRHIZAE a basidiomycete ...
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