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Biology 342

Biology 342. Prerequisite – Biol 204 or permission Requirements – Kendrick (text), lab manual, dissecting kit, lab coat recommended http://www.usask.ca/biology/kaminskyj/342/lectures/

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Biology 342

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  1. Biology 342 • Prerequisite – Biol 204 or permission • Requirements – Kendrick (text), lab manual, dissecting kit, lab coat recommended • http://www.usask.ca/biology/kaminskyj/342/lectures/ • Format – lectures, student presentations, field collection, lab collection and experiments, lab reports, midterm, final exam • Lab demonstrator – Krista Anderson

  2. Field trip Emma Lake Sept 11th • 830am departure, all day trip • Collection and field characteristics • Return to lab and lay out samples for spore prints • Remainder of specimens to 4°C and -20°C

  3. Supplies for the field trip • Field clothes, footwear, hat, raingear • Sunscreen, insect repellent • Clipboard, pencil, notebook • Trowel or spoon, knife (P) • Wide baskets (P), paper bags (P), waxed paper (P) • Field guides (P) • Camera, GPS

  4. More admin details • List of names and email addresses • Class pictures – probably during the first lab period • Signup for literature presentation

  5. Basic fungal facts • Domain? • Subdomain? • Mode of nutrition – auto/heterotrophic? • Mode of nutrition – ingestive/absorptive? • Reproduction?

  6. Major groups of fungi • True fungi – eukarya • Other fungi –

  7. Compare/contrast major groups of fungi • Ascomycetes • Basidiomycetes • Zygomycetes • Chytridiomycetes • Oomycetes • deuteromycetes Ploidy Nutrition Saprotrophy /pathogenesis /symbiosis Examples

  8. Predominant growth mode of fungi – ?? • Consequences • Modular design • Internal transport • Totipotency • Proliferation through sporulation

  9. Morphogenesis – form generation • Animals control body form using • cell division commitment and division plane control • cell migration, • cell differentiation, • regulated cell death • Determinate growth

  10. Plant morphogenesis • Plants control body form using • cell division commitment and division plane control • cell differentiation • regulated cell death (e.g. for leaf abscission) to control body form • Autotrophs, so reduced need to translocate • Growth is indeterminate

  11. Fungal morphogenesis • Fungi are heterotrophic but walled – use directed growth to find nutrients • Unlike animals/plants, fungi are generally small, so gravity is seldom a major factor • Exceptions?

  12. Gravity as a morphogenetic factor

  13. Morphogenic factors include • Turgor • Surface tension • Surface chemistry • Light • Competition

  14. Ecological roles of fungi • Saprobic -- recycling • Pathogenic -- disease • Mutualistic --

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