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

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

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

4. Actinobacteria
High G + C
Gram-positive

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

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

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

8. 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