《微生物学 Microbiology》课程PPT教学课件（英文版）domains bacteria archaea 5/5

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

Copyright © 2004 Pearson Education, Inc., publishing as Benjamin Cummings B.E Pruitt & Jane J. Stein Chapter 11, part E The Prokaryotes: Domains Bacteria and Archaea

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

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

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

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

Actinobacteria 。High G+C 。Gram-positive High G+Cgram-positives Form No mycelia filaments No Form Acid-fast Not acid-fast conidiospores conidiospores Mycobacterium Stain Stain gram- Fix N2 gram Acid-fast Aerobic Anaerobic Gardnerella Nocardia Frankia Streptomyces Actinomyces Cause Make diphtheria propionic acid Corynebacterium Propionibacterium

• High G + C • Gram-positive Actinobacteria

Actinobacteria 。Actinomyces ·Corynebacterium Filament Conidiospores 。Frankia Gardnerella ·Mycobacterium 。Nocardia 。Propionibacterium (b) ·Streptomyces Figure 11.20b

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

Domain Archaea 。Hyperthermophiles ·Pyrodictium 。Sulfolobus 。Methanogens 。Methanobacterium 。Extreme halophiles 。Halobacterium Figure 11.25

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

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

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

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

• 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 Microbial Diversity