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Published online ahead of print on 19 June 2009 as doi:ijs.0.004341-0
International Journal of Systematic and Evolutionary Microbiology 2009;59:1733.

Int J Syst Evol Microbiol (2009); DOI 10.1099/ijs.0.004341-0
© 2009 International Union of Microbiological Societies
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Oceanibaculum indicum gen. nov. sp. nov., isolated from deep sea water of Indian Ocean

Qiliang Lai, Jun Yuan, Changliang Wu and Zongze Shao1

The Third Institute of State Oceanic Administration SOA

1 E-mail: shaozz{at}163.com

A taxonomic study was carried out on strain P24T, which was isolated from a PAH-degrading consortium, enriched from a deep seawater sample collected from the Indian Ocean. The isolate was Gram-negative, rod-shape, motile by means of a polar flagellum, moderately halophilic and capable of reducing nitrate to nitrite. Growth was observed at salinities from 0 to 9% and at temperatures from 10 to 42 °C; it was unable to degrade Tween 80 or gelatin. The dominant fatty acids were C16:0 (15.2%), C18:0 (10.3%), C18:1{omega}7c (52.0%), C18:12-OH (4.7%) and C19:0 {omega}8c cyclo (4.7%). The G+C content of the chromosomal DNA was 64.8 mol%. The 16S rRNA gene sequence comparisons showed that strain P24T was most closely related to Thalassobaculum litoreum CL-GR58T (92.7%), others were all below 90.8%. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain P24T formed a distinct evolutionary lineage within the family Rhodospirillaceae. The strain P24T was distinguishable from phylogenetically related genera by differences in several phenotypic properties. On the basis of the phenotypic and phylogenetic data, strain P24T represents a novel species of a novel genus, for which the name Oceanibaculum indicum gen. nov., sp. nov. is proposed. The type strain of Oceanibaculum indicum is P24T (=CCTCC AB 208226T =LMG 24626T=MCCC 1A02038T).






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