fungus chapter 31 not as innocent as they look!
TRANSCRIPT
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Fungus
Chapter 31
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Not as innocent as they look!
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Mucor Diabetes
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Sporotrichosis
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Madura Foot
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Severe Athletes Foot
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Characteristics
Eukaryotic Majority multicellular (except yeast) Lack chlorophyll Chitin Heterotrophic; they digest food outside
the body and absorb it (saprobes).
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Study this!
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Body structure
Mass of netlike filaments called hyphae. Entire mass of hyphae is called the
mycelium. Hyphae
– divided into cells by cross walls called septa– continuous cells called coenocytic hyphae– Embedded into a plant called haustoria
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Coenocytic
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Haustoria
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Septate
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Reproduction
Sexual or asexual spores. Sexual reproduction occurs during
difficult conditions. Under favorable conditions asexual
spores are produced Adult bodies of most fungi are haploid.
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Diversity of Fungi:
Classified into units called Divisions. 3 divisions based primarily on variations
of sexual reproduction and structures.
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Division Zygomycota:
Terrestrial fungi that live in soil or on decaying plant or animal material.
Coenocytic hyphae, with many haploid nuclei. Asexual spores produced by sporangia Zygosporangia (resistant bodies) form during
sexual reproduction
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2. Division Ascomycota: Sac fungi. Range from yeast to large cup fungi. A small sac called an asci is the sexual
reproductive structure Asci are packed into large fruiting
structures called ascocarps.
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Multicellular septate hyphae Conidia are asexual spores Ascospores are sexual spores. Important in decomposing lignin and
collagen of dead plants and animals. Some are mutualistic (ex. lichen) Many are parasitic to plants (ex.
powdery mildew and Dutch elm disease
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3.Division Basidiomycota:
Club fungus Ex. Shelf fungi, puffballs and stink horns Sexual reproductive structure called the
basidium. The club like shape gives the name to
some of the most common fungal types in this division.
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QuickTime™ and aTIFF (Uncompressed) decompressorare needed to see this picture.
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Division Deuteromycota:
These organism have no known sexual life style.
Fungi imperfecti Ex. Penicillium
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Lichens:
Symbiotic associations of millions of algal cells tangled in a lattice of fungal hyphae.
Soredia, small clusters of hyphae with embedded algae
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Lichens
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Mycorrhizae
Mutualistic association of a fungus and a root.
90% of the fungi is basidiomycota
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Mycorrhizae