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Salinibacillus aidingensis gen. nov., sp. nov. and Salinibacillus kushneri sp. nov., moderately halophilic bacteria isolated from a neutral saline lake in Xin-Jiang, China

State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100080, China

Correspondence
Pei-Jin Zhou
zhou{at}sun.im.ac.cn

Three Gram-positive, moderately halophilic, heterotrophic bacterial strains were isolated from a neutral saline lake in the Xin-Jiang area of China. The strains, designated 8-2^T, W11-1 and 25-7^T, were motile, spore-forming, aerobic rods and contained meso-diaminopimelic acid in their cell walls. Their DNA G+C contents were 37·4, 37·2 and 39·9 mol%, respectively. The main fatty acids in the cellular membranes of these novel strains were C₁₅ and C₁₇ methyl-branched. No species with validly published names showed 16S rRNA gene sequence similarity of more than 95 % with respect to these novel isolates; the most closely related species was a halophilic denitrifier, Bacillus halodenitrificans (94·6 %). Polyphasic taxonomic studies revealed that these strains belong to the Bacillaceae and are distantly related to other genera of the family. It is proposed that a new genus, Salinibacillus, should be created, with Salinibacillus aidingensis (type strain, 25-7^T=AS 1.3565^T=JCM 12389^T) as the type species. Another species, Salinibacillus kushneri, is also proposed, with 8-2^T (=AS 1.3566^T=JCM 12390^T) as the type strain.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains 25-7^T, W11-1 and 8-2^T are AY321436, AY321437 and AY321434, respectively.

The results of SDS-PAGE of whole-cell proteins of strains 8-2^T and W11-1 and a table showing the fatty acid compositions of strains 25-7^T, W11-1 and 8-2^T are available as supplementary material in IJSEM Online.

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