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Aquisalimonas asiatica gen. nov., sp. nov., a moderately halophilic bacterium isolated from an alkaline, saline lake in Inner Mongolia, China

¹ Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Seville, 41012 Seville, Spain
² State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, 100080 Beijing, People's Republic of China
³ Department of Biotechnology, University of the Western Cape, Bellville 7535, Cape Town, South Africa
⁴ Genencor International BV, Archimedesweg 30, 2333 CN Leiden, The Netherlands
⁵ Department of Infection, Immunity and Inflammation, University of Leicester, Leicester LE1 9HN, UK

Correspondence
M. C. Márquez
cmarquez{at}us.es

Two novel moderately halophilic, Gram-negative rods (strains CG12^T and CG13) were isolated from Lake Chagannor in Inner Mongolia Autonomous Region, China. They were strictly aerobic and motile. They grew at pH 6.0–10.8 (optimally at pH 7.5–8.5), at 20–50 °C (optimally at 37 °C) and at salinities of 1–20 % (w/v) total salts (optimally at 7–10 %, w/v). Phylogenetic analysis of the two strains, based on a comparison of their 16S rRNA genes, led to their classification within the class Gammaproteobacteria, the closest recognized type strain being Alkalispirillum mobile DSM 12769^T, with which they were found to share 94.4–94.6 % sequence similarity. On the basis of DNA–DNA hybridization data (showing 100 and 99 % relatedness for each other), the two isolates were found to be members of the same species. The DNA G+C contents of strains CG12^T and CG13 were found to be 63.6 and 64.0 mol%, respectively. The major cellular fatty acids of strain CG12^T, selected as the representative strain, were C_{18 : 1}7c, C_{16 : 0} and C_{12 : 0}, and its polar lipids consisted of phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, a phosphoglycolipid and six unidentified phospholipids. On the basis of the polyphasic evidence from this study, strains CG12^T and CG13 represent a novel genus and species, for which the name Aquisalimonas asiatica gen. nov., sp. nov. is proposed. The type strain of Aquisalimonas asiatica is CG12^T (=CCM 7368^T=CECT 7151^T=CGMCC 1.6291^T=DSM 18102^T).

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