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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
coenocytichyphaseptate
hypha
Fungallife cycles
Fig 31.5
hetero- = different-karyon = nucleus
gamos = marriage
Many spp only reproduce asexually (deuteromycetes)
Ascomycetes
Fig 31.17
dikaryotichyphae
ascus
karyogamy
plasmogamy
meiosis
mitosis
ascospores
conidia(asexual spores)
Basidiomycetes
Fig 31.19
dikaryotichyphae
basidia
karyogamy
plasmogamy
meiosis
basidiospores
basidiocarpmushroom = basidiocarp
Importance of fungi
Symbioses
leaf-cutter ants
mycorrhizae
lichens
Importance of fungi
Pathogens (mostly of plants)
Medicine, biotech, foods
chestnut blightringworm
penicillinSaccharomyces (beer & bread)
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