- Eukaya
- Archea
- Bactria
DOMAIN EUKAYA;
This domain contains 4 more domains within it;
- Protista
- Fungi
- Plante
- Animalia
These are only found in the most EXTREME ENVIRONMENTS:
· Hot springs
· Anerobic or microaerophilic conditions
· Sulphurous Volcanic upwellings
· Extremely saline conditions
· High alkalinity
· Extremely acidic conditions
Phylum: EURYARCHAEOTA
· Metgangens
· Obligate anaerobes producing methane
· Some are also extreme thermophiles
· Extreme Halophiles
· Some use Bacteriorhodopsin to photosynthesis
Methanobrevibacter smithii
Domain: Archaea
Kingdom: Euryarchaeota
Phylum: Euryarcheota
Class: Methanobacteria
Order: Methanobacteriales
Family: Methanobacteriaceae
Genus: Methanobrevibacter
Species: M. smithii
Phylum: Crenarchaeota
- Extreme acidophilic and/or thermophiles (often found at volcanic vents)
- E.g Thermus aquaticus= taq polymerase used DNA amplification
- Some can survive pH 0.9 and >70 degrees
Sulfolobus acidocaldarius
Domain: Archaea
Kingdom: Crenarchaeota
Phylum: Crenarchaeota
Class: Thermoprotei
Order: Sulfolobales
Family: Sulfolobaceae
Genus: Sulfolobus
Species: Sulfolobus acidocaldarius
DOMAIN BACTERIA;
Phylum: Proteobacteria
· Gram negative
- Negatively charged cell wall:
Helps evading Phagocytosis
Physical Barrier
· Largest Number of species:
- E.coli, salmonella, vibrio, Helicobacter
- Anaerobic, Chemoautotrophs, photoautotrophs, heterotrophs
- Beneficial symbionts
- Pathogens
Example;
ESCHERICHA COLI (E.COLI)
Domain: Bacteria
Phylum: Eubacteria
Class: Protebacteria
Order: Gammaprotebacteria
Family: Enterobacteriace
Genus: Escherichia
Species: E.Coli
Phylum: Firmicutes
· Gram positive, with cell wall containing teichoid acids
· Teichoid acids:
- Movement of cations in/out of the cell
- Antigenic specificity
- Some produce extremely persistent endospore e.g. anthrax, tetanus
· Actinomycetales are filamentous bacteria
· Superficially resembling fungi
· Important component of the soil microbiota
· Some serious pathogen, e.g. Mycobacterium
· Produce many antibiotics, e.g. Streptomycin group
STAPHYLOCOCCUS ALBUS (S.ALBUS)
Domain: Bacteria
Phylum: Firmicutes
Class: Cocci
Order: Bacillales
Family: Staphylococcaceae
Genus: Staphylococcus
Species: Staphylococcus Albus
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