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Chapter 11, part B

Chapter 11, part B. The Prokaryotes: Domains Bacteria and Archaea. The Nonproteobacteria Gram-Negative Bacteria. Cyanobacteria. Oxygenic photosynthesis Gliding motility Fix nitrogen. Cyanobacteria. Figure 11.12a-c. Purple and Green Photosynthetic Bacteria. Anoxygenic photosynthesis

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Chapter 11, part B

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  1. Chapter 11, part B The Prokaryotes:Domains Bacteria and Archaea

  2. The Nonproteobacteria Gram-Negative Bacteria

  3. Cyanobacteria • Oxygenic photosynthesis • Gliding motility • Fix nitrogen

  4. Cyanobacteria Figure 11.12a-c

  5. Purple and Green Photosynthetic Bacteria • Anoxygenic photosynthesis • Purple and green sulfur bacteria light 2H2O + CO2 (CH2O) + H2O + O2 light 2H2S + CO2 (CH2O) + H2O + 2S0

  6. Chlamydiae • C. trachomatis • Trachoma • STD, urethritis • C. pneumoniae • C. psittaci • Causes psittacosis

  7. In Bergey's Manual, Volume 5 Figure 11.22a

  8. In Bergey's Manual, Volume 5 Figure 11.22b

  9. Spirochaetes • Borrelia • Leptospira • Treponema Figure 11.23

  10. Bacteroidetes • Anaerobic • Bacteroides. In mouth and large intestine • Cytophaga. Cellulose-degrading in soil

  11. Fusobacteria • Fusobacterium • Found in mouth • May be involved in dental diseases Figure 11.24

  12. Firmicutes • Low G + C • Gram-positive

  13. Clostridiales • Clostridium • Endospore-producing • Obligate anaerobes • Epulopiscium Figure 11.14 & 15

  14. Bacillales • Bacillus • Endospore-producing rods Figure 11.16b

  15. Bacillales • Staphylococcus • Cocci Figure 1.17

  16. Lactobacillales • Generally aerotolerant anaerobes, lack an electron-transport chain • Lactobacillus • Streptococcus • Enterococcus • Listeria Figure 11.18

  17. Mycoplasmatales • Wall-less, pleomorphic • 0.1 - 0.24 µm • M. pneumoniae Figure 11.19a, b

  18. Actinobacteria • High G + C • Gram-positive

  19. Actinobacteria • Actinomyces • Corynebacterium • Frankia • Gardnerella • Mycobacterium • Nocardia • Propionibacterium • Streptomyces Figure 11.20b

  20. Domain Archaea • Hyperthermophiles • Pyrodictium • Sulfolobus • Methanogens • Methanobacterium • Extreme halophiles • Halobacterium Figure 11.25

  21. Microbial Diversity • Bacteria size range • Thiomargarita (750 µm) to nanobacteria (0.02 µm) in rocks Figure 11.26

  22. Microbial Diversity • PCR indicates up to 10,000 bacteria/gm of soil. Many bacteria have not been identified or characterized because they: • Haven't been cultured • Need special nutrients • Are part of complex food chains requiring the products of other bacteria • Need to be cultured to understand their metabolism and ecological role

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