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Published online ahead of print on 19 June 2009 as doi:ijs.0.004234-0
International Journal of Systematic and Evolutionary Microbiology 2009;59:1640.

Int J Syst Evol Microbiol (2009); DOI 10.1099/ijs.0.004234-0
© 2009 International Union of Microbiological Societies
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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, Yanfen Xue2,4 and Yanhe Ma3

1 Institute of Microbiology, CAS;
2 Institution of Microbiology;
3 Institute of Microbiolgy, CAS

4 E-mail: xueyf{at}im.ac.cn

A moderately halophilic, Gram-positive, 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 35-37 °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 the 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 Sediminibacillus halophilus EN8dT was 34.6 %. Based on the polyphasic taxonomic data presented, strain NHBX5T represents a novel species of the genus Sediminibacillus, for which the name Sediminibacillus halotolerans 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.






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