Dana Hock

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• Dana Hock
• Put any additional information here

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Introduction

• Students should be able to describe the
  morphology , life cycles and economic importance
  of the major divisions of Fungi

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Fungi Kingdom

• Fungi are multicellular, eukaryotic heterotrophs
  which obtain their nourishment by absortion

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Structural and life history

• asci- spore producing sacs
• ascocarp- fruiting bodies
• basidocarp-fruiting bodies of basidia ( club
  shaped )
• Mating strains /- different phenotypic fungal
  types no sex
• sporangium-haploid spores develop

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Structural and life history

• Chitn- material of construction in fungi made of
  a nitrogen containing polysaccharide
• Hyphae-fungal filaments
• Mycelium-provide and extensive surface for
  absorption
• Septa- cross partitions
• Haustoria-modified fungal hypahe that penetrate
  a host s tissue

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Classification

• Three major divisions( phyla) based on method of
  reproduction
• Zygomycota- zygote fungi
• Ascomycotta- sac fungi
• Basidomycota-club Fungi

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Alternation of Generation in Fungi

• Coencytic- many nuclei in one large cell
• dikaryotic- two haploid nuclei in one cell that
  have not fused
• plasmogamy- fusion of cytoplasm without nuclear
  fusion
• karyogamy-fusion of nuclei

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Zygomycota

• Bread molds and mycorrhizae
• Hyphae are coenocytic
• erect hyphae with sporangia produce spores
• dikaryotic zygosporangia produced
• karyogomy followed immediately by meiosis

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• Common bread mold

sporangia
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Haploid spores
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Ascomycota

• From unicellular yeast to Morells
• many are mutualistic ( Lichens)
• conidia-asexual spores produced in chains or
  clusters
• ascocarps-dikaryoting fruiting bodies
• asci-terminal sac-like cells where karyogomy
  occurs followed by meiosis results in ascospores

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Parasitic forms
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morrel
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Basidomycota

• Mushrooms, shelf fungi, puffballs, and rusts
• produce spores on a club shaped basidium during a
  short diploid stage
• basidocarp- fruiting body of dikaryotic hyphae
• karyogamy and meiosis occurs in cells at the tip
  ( basidia )making spores

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mushrooms
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Gills on underside of cap
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Mycorrhizae

• Fungal hyphae form a beneficial (mutualistic)
  relationship with pplant roots

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Lichens

• Symbiotic association of Fungus and algae
• Mutualism fungus absorbs moisture and minerals
  providing a suitable growing area/ algae provides
  carbohydrates by photosynthesis

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Crustose
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Fruticose
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Foliose
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Answers to Study Guide 28.2

• A. conidia ( asexual) I. basidocarp
• B. ascocarp J. basidium
• C. ascospore K. basidospore
• D. asci L.
  basidomycete
• E. ascomycete ( cota)
• G. zygosporangium ( zygote)
• F. Sporangia
• H. zygomycete

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Test Your Knowledge

• 1. Septum
• 2. Dikaryon
• 3. Chitin
• 4. Condidia
• 5. Basidium

• 6. Asci
• 7. Mycorrhizae
• 8. Zygospore
• 9. Coenocytic
• 10. Chtridionmycota

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Deuteromycota

• Imperfect fungi
• reproduce only asexually
• pennicillin mold, blue cheese

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Mycorrhizae

• Fungal hyphae form a beneficial (mutualistic)
  relationship with plant roots

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Deuteromycota- athletes foot fungus
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Athletes foot