Nitrosomonas ureae
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Koops et al. 1991 |
Nitrosomonas ureae is a species of bacteria in the genus Nitrosomonas . It is a nitrifying bacterial species which metabolizes ammonia (NH 3 ) to nitrite (NO 2 - ) and thereby gains energy.
features
The cells are rod-shaped with rounded ends or spherical, 0.9-1.1 X 1.5-2.5 micrometers in size. Like all bacteria of the Proteobacteria group, the species is gram-negative . Nitrosomonas ureae is aerobic , the bacterium needs oxygen.
The species can use urea as a source of ammonium. Nitrosomonas ureae , like all members of the Nitrosomonadaceae family , is chemolithoautotrophic ; H. Inorganic electron donors (ammonia) are used to generate energy, the species does not depend on organic energy and carbon sources.
Nitrosomonas ureae is mainly found in oligotrophic freshwater, less often in soils.
metabolism
Like all Nitrosomonadaceae, Nitrosomonas ureae is one of the nitrifiers. The metabolism is based on nitrification , ammonia (NH 3 ) is oxidized to nitrite (NO 2 - ).
The oxidation of ammonia brings electrons into an electron transport chain . A proton motor force is generated, which ultimately leads to the formation of ATP . For carbon fixation , the nitrifying bacteria use the Calvin cycle , which is also used during photosynthesis in plants.
Nitrification is an important part of the earth's nitrogen cycle .
literature
- Michael T. Madigan, John M. Martinko, Jack Parker: Brock - Microbiology . 11th edition. Pearson Studium, Munich 2006, ISBN 3-8274-0566-1
- George M. Garrity: Bergey's manual of systematic bacteriology . 2nd Edition. Springer, New York 2005, Vol. 2: The Proteobacteria Part C: The Alpha-, Beta-, Delta-, and Epsilonproteabacteria , ISBN 0-387-24145-0
Web links
- Genus Nitrosomonas - LPSN List of Prokaryotic Names with Standing in Nomenclature
- A little glimpse into the world of bacteria - AquaCare. Sellner, BR 1997: A little glimpse into the world of bacteria - biological metabolic processes in the aquarium using the example of nitrogen oxidation (nitrification).