S. Myhr et T. Torsvik, Denitrovibrio acetiphilus, a novel genus and species of dissimilatory nitrate-reducing bacterium isolated from an oil reservoir model column, INT J SY EV, 50, 2000, pp. 1611-1619
Citations number
48
Categorie Soggetti
Microbiology
Journal title
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
A novel dissimilatory, nitrate-reducing bacterium, designated strain N2460(
T), was isolated from an oil reservoir model column. Strain N2460(T) is a m
esophilic, obligately anaerobic, marine, Gram-negative bacterium. The cells
are vibrio-shaped and motile by a bipolar flagellum. Strain N2460(T) reduc
es nitrate to ammonia in a mineral medium supplied by acetate. The presence
of a 2-oxoglutarate dehydrogenase activity indicates that acetate is oxidi
zed via the citric acid cycle. No growth is obtained on formate, higher fat
ty acids, malate, fumarate, benzoate, alcohols, sugar, yeast extract, crude
oil, alkanes, proline, hydrogen, sulfur or thiosulfate with nitrate as ele
ctron acceptor. Oxygen, sulfate, thiosulfate and sulfur are not utilized as
alternative electron accepters. Strain N2460(T) grows fermentatively on fu
marate, but not on pyruvate. The G+C content of the DNA is 42.6 mol%. 16S r
RNA gene analysis shows that strain N2460(T) belongs to the Bacteria and th
at the closest relative is 'Geovibrio ferrireducens' (sequence similarity 8
6.9%). On the basis of phylogenetic as well as phenotypic data, it is propo
sed that strain N2460(T) represents the type strain of a new genus and spec
ies, Denitrovikrio acetiphilus gen. nov., sp. nov.