CLASSIFICATION

Their classification is based on the shape and flagellation. The type of growth and biochemical characteristics are important. The GC content of the DNA, which differs among the species is 61.2 mol% for Nitrobacter winogradskyi .

BIOCHEMISTRY

Nitrobacter winogradskyi is facultatively mixotrophic and capable of growing anaerobically with nitrate as electron acceptor, producing nitrite, nitric oxide and nitrous oxide. Aerobically it oxidises nitric oxide to nitrite and thence to nitrate. It can use nitric oxide as a substrate for NADH production. Carboxysomes, poly-beta-hydroxybutyrate (PHB) and ployphosphate granules are present. Heterotrophic growth is slow and inefficient. All tricarboxylic acid cycle enzymes are present.

There is no information.

No information.

There are none known to be produced.

NORMAL FLORA

They live together with the ammonia oxidisers. They are present in many soils, natural stones as well as fresh or brackish waters. The presence of organic materials often selects for the facultatively lithotrophic Nitrobacter species.

Not pathogenic.

Strains of N. winogradskyi can easily be isolated from soils and waters using mineral nitrite media.

Normally found in water and soils.

They are important for the ecology of soil and therefore in agriculture.

None.

Nitrobacteriaceae

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