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Int J Syst Evol Microbiol 59 (2009), 1640-1644; DOI  10.1099/ijs.0.004234-0
© 2009 International Union of Microbiological Societies

Sediminibacillus albus sp. nov., a moderately halophilic, Gram-positive bacterium isolated from a hypersaline lake, and emended description of the genus Sediminibacillus Carrasco et al. 2008

Xiaowei Wang1,2, Yanfen Xue1 and Yanhe Ma1

1 State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, 100101 Beijing, PR China
2 Graduate University of the Chinese Academy of Sciences, 100049 Beijing, PR China

Correspondence
Yanfen Xue
xueyf{at}im.ac.cn

A moderately halophilic, Gram-positive-staining, endospore-forming, rod-shaped and strictly aerobic bacterium, designated strain NHBX5T, was isolated from Lake Nanhuobuxun in China. Strain NHBX5T was able to grow at NaCl concentrations of 0–22 % (w/v) (optimally at 7 %, w/v), at pH 6.0–9.0 (optimally at pH 7.5) and at temperatures of 10–45 °C (optimally at 37 °C). The cell-wall peptidoglycan of strain NHBX5T contained meso-diaminopimelic acid as the diagnostic diamino acid. The predominant isoprenoid quinone was MK-7. The major cellular fatty acids were anteiso-C15 : 0 and anteiso-C17 : 0. The polar lipids were phosphatidylglycerol, diphosphatidylglycerol and a glycolipid. The genomic DNA G+C content of strain NHBX5T was 44.9 mol%. Phylogenetic analysis based on 16S rRNA gene sequence comparisons revealed that strain NHBX5T was most closely related to Sediminibacillus halophilus EN8dT (98.6 % gene sequence similarity). The level of DNA–DNA relatedness between strain NHBX5T and S. halophilus CGMCC 1.6199T was 34.6 %. Based on the data presented, strain NHBX5T represents a novel species of the genus Sediminibacillus, for which the name Sediminibacillus albus sp. nov. is proposed. The type strain is NHBX5T (=DSM 19340T =CGMCC 1.6502T). In addition, an emended description of the genus Sediminibacillus is presented.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain NHBX5T is DQ989634.

A scanning electron micrograph of cells of strain NHBX5T and the cellular fatty acid profiles of strain NHBX5T and S. halophilus EN8dT are available as supplementary material with the online version of this paper.






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