b112_Lecture_31

b112_Lecture_31 - BIOL 112 BIOL 112 Kingdom Fungi General...

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Unformatted text preview: BIOL 112 BIOL 112 Kingdom Fungi General Characteristics General Characteristics Mostly multicellular and terrestrial Absorptive heterotrophs (small organics & minerals): saprobes, parasites or mutualists Cell walls composed of chitin Reproduce either sexually or asexually by spores Hyphae Structure Hyphae Structure The Mycelium The Mycelium Extensive hyphal growth produces a mycelium Mycelia are either on soil surface or other objects or grow below the soil A single mycelium can cover 100s of acres of area with thousands of miles of hyphae! Hyphal growth is key to increased absorption due to increased surface area General Fungal Life Cycle General Fungal Life Cycle May persist & divide for years Typical Cycle Common in changing environment Very brief Fungal Phylogeny Fungal Phylogeny Zygomycota Zygote Fungi Zygomycota Zygote Fungi Mostly terrestrial, on soil or detritus Mycorrhizae are mutualists on plant roots Coenocytic hyphae, except where reproductive cells are formed Zygosporangia are extremely resistant to environmental conditions Rhizopus Rhizopus on Orange Peel on Orange Peel Progametangium Progametangium Rhizopus Rhizopus Zygosporangium Zygosporangium Arbuscular Mycorrhizae Arbuscular Mycorrhizae Ascomycota Sac Fungi...
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b112_Lecture_31 - BIOL 112 BIOL 112 Kingdom Fungi General...

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