Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will...
-
Upload
amberlynn-brianna-griffin -
Category
Documents
-
view
218 -
download
3
Transcript of Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will...
![Page 1: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/1.jpg)
Announcements
• Next week – no lab Wednesday evening– Lab closes 5pm for Biol 203 exam– Lab will be open Tuesday 5-10 pm
• Biol 204 notes– www.usask.ca– Biology– Class notes -- Biol 204 – kaminskyj– 2004 lectures
![Page 2: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/2.jpg)
Cytoplasmic migration in tip growth
![Page 3: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/3.jpg)
Fungal cell walls
• Thin• Fiber reinforced
– Taxonomically relevant
• Plastic/extensible at tip
• Elastic/inextensible at maturity
![Page 4: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/4.jpg)
Wall vesicle exocytosis at Saprolegnia hyphal tip
![Page 5: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/5.jpg)
Hydrophobins
• Without hydrophobins, hyphae cannot break through the surface tension of water
• Hydrophobins are essential for mold sporulation and mushroom formation
![Page 6: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/6.jpg)
Hydrophobin rodlets
![Page 7: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/7.jpg)
Diverse features of Protista (P), Chromista (C), Eumycota (F)
• Walls in vegetative phase– Lacking (P)– Having (C, F)
![Page 8: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/8.jpg)
Diverse features of Protista (P), Chromista (C), Eumycota (F)
• Walls in vegetative phase
• Mode of nutrition (always heterotrophic)– Ingestive (P)– Absorptive (C, F)
![Page 9: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/9.jpg)
Protistan fungi – three taxa
• Myxomycota – “acellular” slime molds
![Page 10: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/10.jpg)
Dictyosteliomycota – cellular slime molds
![Page 11: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/11.jpg)
Plasmodiophoromycota – endoparasitic slime molds
![Page 12: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/12.jpg)
Common features of Protistan fungi
• Nutrition by ingestion– Possible because vegetative stages do not
have walls
![Page 13: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/13.jpg)
Common features of Protistan fungi
• Nutrition by ingestion
• Lifestyle – Individual cells or colonies– Dictyosteliomycota -> Alternating individual
and colonial stges
![Page 14: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/14.jpg)
Common features of Protistan fungi
• Nutrition by ingestion• Lifestyle
– Individual cells or colonies
– Alternating individual and colonial stges (Dictyosteliomycota)
• Sexual reproduction by spore formation– Only walled stage– Fibrils of peptidoglycan, cellulose, chitin
![Page 15: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/15.jpg)
Myxomycete plasmodia
![Page 16: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/16.jpg)
Physarum – nuclear behaviour
![Page 17: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/17.jpg)
Myxomycete plasmodia can distinguish nonself and self
![Page 18: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/18.jpg)
Physarum on heterogeneous substrate – food preference
![Page 19: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/19.jpg)
Myxomycete spores in sporangia
Physarum Stemonitis
![Page 20: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/20.jpg)
Myxomycete spore walls contain peptidoglycan
![Page 21: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/21.jpg)
![Page 22: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/22.jpg)
Dictyosteliomycota – “cellular” slime molds
![Page 23: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/23.jpg)
Dictyostelium
Aggregation of amoebae uses chemical signals
![Page 24: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/24.jpg)
Dictyostelium cell differentiation model system
www2.mrc-lmb.cam.ac.uk
![Page 25: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/25.jpg)
Dictyostelium spore walls contain cellulose
niko.unl.edu
![Page 26: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/26.jpg)
Plasmodiophoromycota – endoparasitic slime molds
![Page 27: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/27.jpg)
Plasmodiophora in cabbage root hair
![Page 28: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/28.jpg)
Plasmodiophora resting spores
![Page 29: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/29.jpg)
Chromistan fungi – Oomycetes
• Saprobes, parasites/pathogens
![Page 30: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/30.jpg)
Chromistan fungi – Oomycetes
• Saprobes, parasites/pathogens
• Obligate parasites – must have a living host to complete life cycle – aggressive
• Facultative parasites – parasitism is optional – less aggressive
![Page 31: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/31.jpg)
Saprophytes and facultative parasites
Asexual zoospores ofAchlya biusexualis
![Page 32: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/32.jpg)
Attachment, infection, colonization
• In nature, infective stage is motile flagellated zoospores – primary and secondary
• Heterokont flagella• Zoospores find a food
source by chemotaxis
![Page 33: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/33.jpg)
Attachment, infection, colonization
• In nature, infective stage is motile flagellated zoospores – primary and secondary
• Heterokont flagella
• Zoospores locate a food source by chemotaxis
![Page 34: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/34.jpg)
![Page 35: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/35.jpg)
Attachment, infection, colonization
• In nature, infective stage is motile flagellated zoospores – primary and secondary
• Zoospores find food a source by chemotaxis
• Attachment is followed by shedding flagella
• Infection requires growth of a penetrating hypha
![Page 36: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/36.jpg)
Saprophyte attachment and germination
![Page 37: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/37.jpg)
1° zoospore
1° cyst
2° zoospore
2° cyst
germinationandinfection
Morphology and parasitic aggressiveness
![Page 38: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/38.jpg)
![Page 39: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/39.jpg)
Parasitism
The joy of slime
![Page 40: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/40.jpg)
Oomycetes as plant pathogens Phytophthora infestans
www.scisoc.org/feature/lateblit/chapter1/epidemic.htm
![Page 41: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/41.jpg)
Understanding late blight
• disease attributed to – excess water in the plants, – effects of the newly
introduced steam locomotives
• Reverend M.J. Berkeley– Early 1850’s– Fungal pathogen
![Page 42: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/42.jpg)
Phytophthora sporangia and zoospores
www.scisoc.org/feature/lateblit/chapter1/epidemic.htm
Drier soils -> direct germination
Wet soils -> zoospores
![Page 43: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/43.jpg)
Social consequences of Phytophthora infestans riots, eviction, emigration
![Page 44: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/44.jpg)
Sexual spores of oomycetes
Major significance in genetic recombination -> development of new pathotypes
![Page 45: Announcements Next week – no lab Wednesday evening –Lab closes 5pm for Biol 203 exam –Lab will be open Tuesday 5-10 pm Biol 204 notes –.](https://reader036.fdocuments.us/reader036/viewer/2022062722/56649f345503460f94c520a3/html5/thumbnails/45.jpg)
Next time:it’s not easy being green