27 lecture protists!

729 views

Published on

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
729
On SlideShare
0
From Embeds
0
Number of Embeds
16
Actions
Shares
0
Downloads
6
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

27 lecture protists!

  1. 1. Gram
  2. 2. • Botulin, tetanus • Exotoxin is made inside bacteria and secreted out • Exotoxin can elicit immune response • Exotoxin can be vaccinated against
  3. 3. Exotoxin • Botulin, tetanus • Exotoxin is made inside bacteria and secreted out • Exotoxin can elicit immune response • Exotoxin can be vaccinated against • G-positive
  4. 4. Endotoxin • Gram negative • Have outer membrane • ENDOtoxin is released when bacteria die • ENDOtoxin does not elicit an immune response
  5. 5. Protists (28) • All are eukaryotes • Habitat
  6. 6. Old classification 1. slime mold 2. Algae 3. Protozoa
  7. 7. diplomad • • • • Flagella Mostly parasites Asexual reproduction TWO nuclei, lack mitochondria, no Golgi • Giardia (cause diarrhea) “looks like a happy face”
  8. 8. parabasalids • • • • Anaerobic flagellate NO mitochondria YES, it has a Golgi Flagella arranged in cluster on anterior • Commensal symbiont of animals • Termites and cockroaches have parabasalids in their guts • Trichomonas (STD) transmit through toilet seat
  9. 9. Trichomoniasis • Change of pH in vagina shift from 4 to 5 (less acidic)
  10. 10. kinetoplastids • Kinetoplast: DNA found in mitochondria • Some are free living and some are parasites • Leishmania (sand fly) • Trypanosome (African sleeping sickness) • Chagas (kissing bug)
  11. 11. Euglenids • pellicle (thin, flexible outer covering) • Chloroplast (auto or heterotrophic) • Eyespot (stigma): detect light • One or two flagella • Paramylon granule: stores starch • Euglena
  12. 12. Alveolates • Alveoli (membrane bound sac) • THREE phylum 1. Dinoflagellate 2. Ciliate 3. apicomplexa
  13. 13. dinoflagellate • marine, unicellular, photosynthetic • possess 2 flagella • chromosomes lack histones • bioluminescence • many are symbiont of corals; dinoflagellates give sugar to corals; corals provide home • coral bleaching
  14. 14. red tide • explosive growth of dinoflagellates • filter feeder (i.e. clams) eat the neurotoxin, then humans eat the clams • Pfiesteria (dinoflagellate) make poison
  15. 15. Apicomplexan (sprozoan) • harmful protist • malaria 1. apicoplast (nonphotosynthetic plastid) which stores starch 2. apical complex used to penetrate host’s cell • two or more different host species for life cycle completion • Plasmodium sps: cause malaria • cyclical chills • female mosquito Anopheles
  16. 16. Toxoplasma (apicomplexan) • causes toxoplasmosis • can cause blindness in immunocompromised people • can damage human fetus
  17. 17. ciliates • possess cilia to move and feed • have TWO nuclei 1. 2. large: everyday cell function (metabolism) small: sexual reproduction (conjugation) • MOST advanced protist – gullet: food particles go in – anal pore: waste goes out – For other protists, “same hole is used for everything,” Prof. Phommasaysy
  18. 18. stramenopiles (heterokontes) • TWO flagella 1. hairy 2. smooth • EXCEPT oomcytes, all have fucoxanthin (yellow-brown carotenoid) • golden algae • brown algae – conceptide: make gametes and zoospores
  19. 19. FOUR clades of stramenopiles 1. 2. 3. 4. oomycetes diatoms golden algae brown algae
  20. 20. oomycetes (water molds) • fungus-like protists • oogonia “egg fungi” have female gametes • oogonia • water molds: fish parasites • white rust: tree parasites • downy mildew: crop plant parasites
  21. 21. Irish potato famine • oomycetes • Phytophthora infestans
  22. 22. diatoms • photosynthetic • two-part, silica shell called frustule • Why are they important? – most O2 production (more than rain forests) – food for organisms – oil (fossil fuel) – diatomaceous earth make insectide
  23. 23. golden algae • pigment fucoxanthin • biflagellated • most are freshwater • P. Parvums
  24. 24. brown algae (seaweed, kelp) • Phaeophyles • most complex, largest algae • most are multicellular • algin
  25. 25. Quiz on Thursday 11/21!

×