Fungal Groups

Fungal Groups PowerPoint PPT Presentation

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Fungus-related terms. SaprobeSaprophyteHyphaeMyceliumFruiting bodyChitinconidia. Fungi. Cellular CharacteristicsMulticellularEukaryoticHeterotrophicHave cell walls reinforced with chitinUsually haploidDiploid only during sexual reproduction. Basidiomycetes. Examplesmushrooms, rusts, smu

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Fungal Groups

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1. Fungal Groups Ascomycetes Basidiomycetes Imperfect Fungi--Deuteromycetes Zygomycetes

2. Fungus-related terms Saprobe Saprophyte Hyphae Mycelium Fruiting body Chitin conidia

3. Fungi Cellular Characteristics Multicellular Eukaryotic Heterotrophic Have cell walls reinforced with chitin Usually haploid Diploid only during sexual reproduction

4. Basidiomycetes Examples—mushrooms, rusts, smuts, puffballs Basidia—club shaped reproductive structure found on the gills. Mating strains Fusion Dikaryotic hyphae Nuclear fusion Zygote—diploid Meiosis Formation of haploid spores Germination

6. Basidiomycetes

7. Ascomycetes Sac Fungi Truffels, Morels, Penicillium, Yeasts, Candida albicans, Saccharomyces cervisiae, Sordaria Ascus ascospore

8. Ascomycetes

10. Zygomycetes Terrestrial Fungi Examples—Bread Mold, many disease-causing parasitic fungi, Rhizopus stolonifer, Zygosporangium Zygospores

11. Zygomycetes

13. Imperfect Fungi Taxonomic holding station Scientists have not discovered a sexually reproductive stage in these organisms Candida and Penicillium were both once categorized in this group.

14. Fungal Symbiosis Mycorrhizae—Mutualistic association between tree roots and fungi. Help to increase water absorption. Lichens—Mutualistic association between fungi and cyanobacteria. Play a role in primary succession.

15. Fungal Diseases Ascomycetes Aspergillus—Aspergilloses—allergies; sinus, ear, and lung infections. Candida albicans—yeast infections, thrush Claviceps purpurea—ergotism Ophiostoma ulmi—Dutch elm disease Cryphonectria parasitica—Chestnut blight Trichophyton tonsurans –ringworm Trichophyton mentagrophytes and Trichophyton rubrum --Athlete’s foot Basidiomycetes Amanita—Severe poisoning Ustilago maydis—corn smut Puccinia graminis—Wheat rust

16. Mycorrhizae

17. Meiosis in Sordaria Ascomycete Fungi Hyphae Mycelium Fruiting Body Asexual Spores--Conidia Sexual Spores--Ascospores Ascus Fungus is usually Haploid.

18. Meiosis in Sordaria Fusion of Mycelia forms Diploid cells. Undergoes meiosis to form ascospores. Perithecium or Fruiting Body Tan and Black Spore Producers

19. Life Cycle of Sordaria

20. Sordaria (Sexual Spore Formation without Crossing Over)

21. Sordaria (Formation of Sexual Spores with Crossing Over)

22. Stereomicroscope View of Hyphae and Fruiting Bodies

23. Sordaria Ascospores with no crossing over

24. Sordaria Ascospores with crossing over

25. Sordaria Ascospores with crossing over

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