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Int J Syst Evol Microbiol 58 (2008), 2828-2832; DOI  10.1099/ijs.0.2008/000471-0
© 2008 International Union of Microbiological Societies

Bacillus aidingensis sp. nov., a moderately halophilic bacterium isolated from Ai-Ding salt lake in China

Yanfen Xue1, A. Ventosa2, Xiaowei Wang1, Peigen Ren1, Peijin Zhou1 and Yanhe Ma1

1 State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
2 Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla, 41012 Sevilla, Spain

Correspondence
Yanhe Ma
mayanhe{at}im.ac.cn

A Gram-positive, halophilic bacterium was isolated from a sediment sample from Ai-Ding salt lake in China. The isolate, designated strain 17-5T, grew at salinities of 8–33 % (w/v) NaCl (optimally at 12 %, w/v). The genomic DNA G+C content of strain 17-5T was 48.1 mol%. The predominant isoprenoid quinone was MK-7(H2) and the cell-wall peptidoglycan contained meso-diaminopimelic acid. The major polar lipids were diphosphatidylglycerol and an unidentified glycolipid. The major cellular fatty acids were anteiso-C15 : 0, anteiso-C17 : 0, iso-C16 : 0 and C16 : 0. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain 17-5T was a member of the genus Bacillus, being most closely related to Bacillus qingdaonensis JCM 14087T (96.0 % sequence similarity) and Bacillus salarius DSM 16461T (95.6 %). The levels of 16S rRNA gene sequence similarity with respect to other Bacillus species were less than 91.7 %. Comparative analysis of the 16S rRNA gene sequence data, chemotaxonomy and phenotypic features of the novel isolate and related species of Bacillus indicated that strain 17-5T represents a novel species within the genus Bacillus, for which the name Bacillus aidingensis sp. nov. is proposed. The type strain is 17-5T (=CGMCC 1.3227T=DSM 18341T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain 17-5T is DQ504377.

Photomicrographs of cells of strain 17-5T are available as supplementary material with the online version of this paper.






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Copyright © 2008 by the International Union of Microbiological Societies.