Marivita lacus sp. nov., isolated from a saline lake

International Journal of Systematic and Evolutionary Microbiology
Zhi-Ping ZhongZhi-Pei Liu

Abstract

A Gram-staining-negative, strictly heterotrophic and aerobic bacterium, strain TS-T44T, was isolated from a saline lake, Tuosu Lake in Qaidam basin, Qinghai province, China. Its taxonomic position was investigated using a polyphasic approach. Cells of strain TS-T44T were non-endospore-forming, non-motile rods, 0.8-1.2 μm wide and 1.2-3.0 μm long. Catalase- and oxidase-positive. Growth occurred in the presence of up to 8 % (w/v) NaCl (optimum, 3.0 %) and at 15-35 °C (optimum, 25 °C) and pH 7.0-10.0 (optimum, pH 7.5-8.5). C18 : 1ω7c was the predominant fatty acid. The major respiratory quinone was Q-10. The major polar lipids were phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine, an unidentified aminolipid and an unknown lipid. The DNA G+C content was 65.5 mol% [determined from the melting temperature (Tm)]. Phylogenetic trees based on 16S rRNA gene sequences showed that strain TS-T44T was associated with the genus Marivita and showed highest sequence similarity to Marivita cryptomonadis CL-SK44T (97.7 %), Marivita litorea CL-JM1T (97.5 %) and Marivita geojedonensis DPG-138T (97.3 %), and < 97 % to other species. DNA-DNA relatedness of strain TS-T44T to M. cryptomonadis JCM 15447T, M. litorea JCM 15446T and M. ...Continue Reading

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May 29, 2014·International Journal of Systematic and Evolutionary Microbiology·Zhi-Ping ZhongZhi-Pei Liu

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