Desulfonatronovibrio halophilus sp. nov., a novel moderately halophilic sulfate-reducing bacterium from hypersaline chloride–sulfate lakes in Central Asia

Desulfonatronovibrio halophilus sp. nov., a novel moderately halophilic sulfate-reducing bacterium from hypersaline chloride–sulfate lakes in Central Asia

Sorokin, D.Y.
Tourova, T.P.
Abbas, B.
Suhacheva, M.V.
Muyzer, G.

Applied Sciences

Biotechnology

2012-05-01

Four strains of lithotrophic sulfate-reducing bacteria (SRB) have been enriched and isolated from anoxic sediments of hypersaline chloride–sulfate lakes in the Kulunda Steppe (Altai, Russia) at 2 M NaCl and pH 7.5. According to the 16S rRNA gene sequence analysis, the isolates were closely related to each other and belonged to the genus Desulfonatronovibrio, which, so far, included only obligately alkaliphilic members found exclusively in soda lakes. The isolates utilized formate, H2 and pyruvate as electron donors and sulfate, sulfite and thiosulfate as electron acceptors. In contrast to the described species of the genus Desulfonatronovibrio, the salt lake isolates could only tolerate high pH (up to pH9.4), while they growoptimally at a neutral pH. They belonged to the moderate halophiles growing between 0.2 and 2 MNaCl with an optimumat 0.5 M.On the basis of their distinct phenotype and phylogeny, the described halophilic SRB are proposed to form a novel species within the genus Desulfonatronovibrio, D. halophilus (type strain HTR1T = DSM24312T = UNIQEM U802T).

sulfate-reducing bacteria (SRB)
desulfonatronovibrio
hypersaline lakes
halophilic

http://resolver.tudelft.nl/uuid:63607f4e-e08c-44ea-9ad5-e8f6d74209cc

doi:1007/s00792-012-0440-

Springer-Verlag

1433-4909

http://link.springer.com/article/10.1007/s00792-012-0440-5

Extremophiles, 16(3)2012

Institutional Repository

journal article

(c)2012 The Authors and Springer