1. Fungi Biol 121, Fall 2010, Tom Buckley 11 Oct 10 heterotrophs some are unicellular (yeasts) most are multicellular body = mycelium (many hyphae) feed by absorption some are septate, others ceonocytic cell walls strengthened by chitin coenocytic hypha septate hypha

2. Fungal life cycles Fig 31.5 hetero- = different -karyon = nucleus gamos = marriage Many spp only reproduce asexually (deuteromycetes)

3. Ascomycetes Fig 31.17 dikaryotic hyphae ascus karyogamy plasmogamy meiosis mitosis ascospores conidia (asexual spores)

4. Basidiomycetes Fig 31.19 dikaryotic hyphae basidia karyogamy plasmogamy meiosis basidiospores basidiocarpmushroom = basidiocarp

5. Importance of fungi Symbioses leaf-cutter ants mycorrhizae lichens

6. Importance of fungi Pathogens (mostly of plants) Medicine, biotech, foods chestnut blight ringworm penicillin Saccharomyces (beer & bread)