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FUNGI
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FUNGI COMMON FUNGI EXAMPLES:
Mushrooms, yeasts, molds, morels, bracket fungi, puff balls
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FUNGI GENERAL INFORMATION
Primarily decomposers – return organic matter to the soil Used to produce antibiotics like penicillin Used for food – mushrooms, yeast Parasites – plants and animals (athlete’s foot, ringworm)
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FUNGI OVERVIEW Nonmotile organism than obtain food by decomposing organic matter Once considered plants, but contain no chlorophyll and are not photosynthetic Also unlike animals, therefore placed in own kingdom
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FUNGI DOMAIN EUKARYOTA KINGDOM FUNGI General characteristics
Eukaryotic Heterotrophic Have cell walls with chitin (different than plant, protist, and bacterial cell walls) May be unicellular but most are multicellular
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molds
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mildews
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rusts
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smuts
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yeasts
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mushrooms
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GIANT PUFFBALL
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FUNGI BASIC FUNGI BODY STRUCTURE Hyphae
Individual filaments that contain cytoplasm and one or more nuclei Secrete enzymes to digest food Nutrients absorbed through cell wall
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FUNGI Mycelium Entwined hyphae
Most of fungus, under substrate (surface it’s growing on)
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FUNGI FRUITING BODY Visible part Contains spore producing structures
Like a mushroom cap
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FUNGI FEEDING TYPES (NUTRITION) Saprophytic – feed on dead matter
Parasitic – feed on living organisms
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FUNGI HABITATS Need organic material, moisture
Live almost everywhere, from polar icecaps to deserts to oceans Reach new areas through spores carried by wind Spores are necessary to find new food sources
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FUNGI FOUR GROUPS OF FUNGI -- 81,500 species of fungi divided by structure and reproduction ZYGOMYCETES – bread molds ASCOMYCETES – sac fungi (morels, truffles, and yeasts BASIDIOMYCETES – mushrooms, puff balls DEUTEROMYCETES – imperfect fungi (penicillium)
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FUNGI Common molds –Zygomycetes
Frequently found in soil or on dead animals or plants Hyphae lack septa Specialized hyphae Rhizoids that absorb nutrients and hold molds to their food source Stolons that connect groups of rhizoids together Sporangia produces spores during reproduction
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FUNGI ZYGOMYCOTA gets its name from the tough spores produced during sexual reproduction
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FUNGI Sac fungi –Ascomycetes
Powdery mildews, yeasts, fungi in lichens, and morels Characteristic that links these are production of saclike structures called asci during sexual reproduction Asexually reproduction is rare
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FUNGI Club Fungi –Basidiomycetes Mushrooms are club fungi
Have a tendency to reproduce sexually Asexually reproduction is rare Three visible structures of mushrooms Stipe Cap Gills made from tightly packed mycelia Fruiting bodies are called basidia
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Structure of Mushroom annulus stipe
Most fungi are saprophytic or parasitic. The saprophytes are helpful because they break down organic material returning nutrients to the soil.
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FUNGI Imperfect fungi – Deuteromycetes
Reproduce asexually and NOT sexually Examples are athlete’s foot & ringworm Example that is helpful is Penicillium because it make the antibiotic Spores called conidia come from hyphae called conidiophores
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FUNGI ECOLOGICAL ROLES
Decompose dead organisms; clear out dead plants and animals Recycle nutrients
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FUNGI ECOLOGICAL ROLES SYMBIOTIC RELATIONSHIPS
LICHEN --a symbiotic association between a fungus and a photosynthetic partner, usually a cyanobacterium or green alga. The fungi hyphae provide protection and hold moisture while food is provided by the photosynthetic partner.
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FUNGI ECOLOGICAL ROLE -- SYMBIOTIC RELATIONSHIP WITH PLANT ROOTS
Mycorrhizae: a symbiotic association between a fungus and plant roots. Over 90% of plants have fungi associated with their roots. The fungus absorbs and concentrates phosphates for delivery to the plant roots. In return, the fungus receives sugars synthesized by the plant during photosynthesis.
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FUNGI ECONOMIC ROLE Used directly as food, or to make food Yeasts are useful in the making of bread and fermented drinks.
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FUNGI ECOLOGICAL ROLE Some parasitic fungi are actually human pathogens causing athlete's foot and ringworm Some parasitic fungi are plant pathogens that destroy crops Produce medicine (antibiotics)
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IMPERFECT FUNGI
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IMPERFECT FUNGI
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