Pseudomonadaceae
| Pseudomonadaceae | ||||||||||
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Colonies of Pseudomonas aeruginosa in a blood agar |
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| Systematics | ||||||||||
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| Scientific name | ||||||||||
| Pseudomonadaceae | ||||||||||
| Winslow et al. 1917 |
The Pseudomonadaceae form a family within the Gammaproteobacteria . Like all proteobacteria, the representatives of this family are gram-negative . They are aerobic bacteria, they need oxygen to grow.
Within this family, the genus Pseudomonas is very species-rich and contains bacteria of ecological and medical importance. Species such as Pseudomonas aeruginosa can be dangerous for people with weakened immune systems, sub-species of Pseudomonas syringae cause tubercular disease in the olive tree .
metabolism
Species of this family, also known as "pseudomonads", use many different substances as food, but they are not able to break down substances through fermentation (so-called non- fermenters). The Entner-Doudoroff pathway is a typical metabolic pathway for this group. The genera Azotobacter and Azomonas are also able to absorb nitrogen (N 2 ) and use it for protein synthesis. They are among the free-living nitrogen fixers . In contrast to some other N 2 -fixing bacteria (such as the nodule bacteria ), they are not dependent on a symbiosis with plants. Some nitrate-reducing bacteria ( denitrificants ) are also represented in the group, e.g. B. Pseudomonas denitrificans .
Systematics
The following genera are placed in the family Pseudomadaceae:
- Azomonas Winogradsky 1938
- Azorhizophilus Thompson & Skerman 1981
- Azotobacter Beijerinck 1901
- Cellvibrio (Winogradsky 1929) Blackall et al. 1986
- Mesophilobacter Nishimura et al. 1989
- Pseudomonas Migula 1894
- Rhizobacter Goto & Kuwata 1988
- Rugamonas Austin & Moss 1987
- Serpens Goto & Kuwata 1988
The genera Azotobacter , Azorhizophilus and Azomonas are also summarized in the Azotobacter group (Azotobacter group). Furthermore, some authors put Azotobacter and Azomonas in their own family, the Azotobacteraceae (also spelled with i : Azotobacter i aceae).
swell
- ↑ JP Euzéby: List of Prokaryotic names with Standing in Nomenclature - Family Pseudomonadaceae ( Memento of the original dated December 6, 2006 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (As of January 4, 2013)
- ↑ NCBI
literature
- Michael T. Madigan, John M. Martinko, Jack Parker: Brock - Microbiology . 11th edition. Pearson Studium, Munich 2006, ISBN 3-8274-0566-1