Frog Dissection Why are we dissecting frogs?? dissecting frogs??
Biology 342 Prerequisite – Biol 204 or permission Requirements – Kendrick (text), lab manual,...
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Transcript of Biology 342 Prerequisite – Biol 204 or permission Requirements – Kendrick (text), lab manual,...
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
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
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
More admin details
• List of names and email addresses
• Class pictures – probably during the first lab period
• Signup for literature presentation
Basic fungal facts
• Domain?– Subdomain?
• Mode of nutrition – auto/heterotrophic?
• Mode of nutrition – ingestive/absorptive?
• Reproduction?
Major groups of fungi
• True fungi – eukarya
• Other fungi –
Compare/contrast major groups of fungi
• Ascomycetes
• Basidiomycetes
• Zygomycetes
• Chytridiomycetes
• Oomycetes
• deuteromycetes
PloidyNutrition
Saprotrophy/pathogenesis/symbiosis
Examples
Predominant growth mode of fungi – ??
• Consequences• Modular design
• Internal transport
• Totipotency
• Proliferation through sporulation
Morphogenesis – form generation
• Animals control body form using– cell division commitment and division plane
control– cell migration, – cell differentiation, – regulated cell death
• Determinate growth
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
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?
Gravity as a morphogenetic factor
Morphogenic factors include
• Turgor
• Surface tension
• Surface chemistry
• Light
• Competition
Ecological roles of fungi
• Saprobic -- recycling
• Pathogenic -- disease
• Mutualistic --