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24 Cards in this Set
- Front
- Back
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Fungal growth cycles |
Involve a growth phase and reproductive phase |
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Molds |
Grow as long, tangled filaments of cells in colonies |
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Yeasts |
Unicellular fungi |
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Mycelium |
Thick mass of hyphae |
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Fungal cell walls |
Composed of chitin |
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Hyphae |
Contain many nuclei (coenocytic) |
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Fungi |
-Heterotrophic -most are saprobes |
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Fungal growth |
-take up nutrients -aerobic -room temp growth -psychrophilic= grow in refrigerator |
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Fungal endophytes |
-live in plant tissue, particularly leaves. |
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Asexual reproduction |
-develop at end of hyphae -sporangiospores develop in sacs called sporangia. -conidiophores unprotected spores. -can also produce serially -heterokaryon= opposite mating types come together |
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Chytridiomycota |
-oldest fungi -aquatic -flagellated reproductive cells |
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Glomeromycota |
-live in over 80% of plant roots -mitosporic fungi lack sexual cycle of reproduction |
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Zygomycetes |
-Terrestrial fungi grow as mold on bread or produce. -during sexual reproduction form diploid zygospore. |
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Ascomycetes |
-75% of known fungi -Bakers yeast -aflatoxin -edible morel -produces penicillin -produces candida albicans -conidia: asexual -ascospores: sexual |
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Lichens |
Mutualistic: between fungus and photosynthetic organism |
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Basidiomycetes |
-Club fungi: mushrooms / puff balls -some form mycorrhizae -others form plant pathogens -gills on mushroom gap contain sexual ly produced basidiospores |
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Yeasts |
-Represent a term for any single celled stage of a fungus. -saccharomyces: fungus can ferment sugars. Used in bread baking and alcohol production. |
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Mycotoxins |
Some fungi can be poisonous or deadly. Ex: ergot on rye |
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Dermatophytosis |
Infection of the body surface |
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Sporotrichosis |
-Occupational hazard -Can occur in people who work with wood, wood products,soil |
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Histoplasmosis |
-System disease/respiratory disease most common -found in dry, dusty soil, chicken coops, bat caves |
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Amanita |
Causes 90% of deaths from mushroom ingestion |
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Blastomycosis |
-caused by dusty soil/bird droppings -respiratory route -can cause lung and skin infections |
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Coccidiodomycosis |
-respiratory: inhalation of spores -potentially lethal -seen in desert valleys |
