Fungus
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Fungus

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    Fungus Fungus Presentation Transcript

    • The Fungus Amongus
    • Overview of Kingdom Fungi
      • Eukaryotic, heterotrophic, multicellular
      • Most are microscopic molds or yeasts
      • Molds - tangled masses of filaments of cells
      • Yeasts - unicellular fungi resembling bacteria
      • The study of fungi is known as mycology
    • Molds and Yeasts
    • Obtaining Nutrients
      • Absorb nutrients from their environment
      • Secrete enzymes into food
      • Saprophytic - live on organic compounds absorbed from dead organisms
    • Structure
      • Hyphae - chitin containing filaments distinguish fungi from plants
    • Reproduction
      • Asexually
      • Spores - modified cells on hyphae
      • Fragmentation - hyphae dry and scatter
      • Budding - part of yeast cell pinches off and forms new cell
      • Sexually - fungi occur not in male and female, but rather in minus or plus
      • Minus and plus fungi can fuse hyphae (conjugation) and produce genetically diverse spores
    • Adaptive Advantage!
    • Classification
      • Fungi are classified in 3 phyla
      • Zygomycota, Basidiomycota, and Ascomycota
    • Phylum Zygomycota
      • Coenocytic hyphae - lack septa (dividing walls)
      • Reproduce by forming spores and conjugating
      • Examples: Mucor (soil mold) , Rhizopus (bread/veggie mold)
    • Mucor and Rhizopus
    • Phylum Basidiomycota
      • Spetate hyphae - contain dividing walls
      • Asexual reproduction is rare
      • Sexually by producing basidiospores (from fruiting body)
      • Examples: Puccinia (plant rust), Amanita (shrooms)
    • Puccinia and Amanita
    • Phylum Ascomycota
      • Septate or unicellular hyphae
      • Form conidia spores, buds(asexual)
      • Sexually by producing ascospores
      • Examples: yeasts, morels
    • Symbiosis
      • Mycorrhizae - form along root systems of plants and absorb sugars while delivering nitrogen to plants
      • Lichens - fungus/plant structure found on rocks, fungus dissolves rock for nutrients
    • Fungi and Humans
      • Fungal diseases: athletes foot, ringworm, yeast infections, jock itch
      • Result from a fungal attack on tissue
      • Result in itching, burning, discharge
    • Fungi and Humans
      • Many fungi are a valuable food source or beneficial in medicine/food production (Penicillin)