Maritimibacter lacisalsi sp. nov., isolated from a salt lake, and emended description of the genus Maritimibacter Lee et al. 2007----中国科学院微生物研究所

科研成果

论文题目:	Maritimibacter lacisalsi sp. nov., isolated from a salt lake, and emended description of the genus Maritimibacter Lee et al. 2007
作者:	Zhong Zhi-Ping, Liu Ying, Zhou Yu-Guang, Liu Hong-Can, Wang Fang, and Liu Zhipei*.
联系作者:	Liu, Zhipei*
刊物名称:	Int J Syst Evol Microbiol
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影响因子:	2.403
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摘要:	A Gram-staining-negative, non-motile, strictly aerobic bacterium, strain X12M-4T, was isolated from Xiaochaidan Lake, a salt lake (salinity 9.9 %, w/w) in Qaidam basin, Qinghai Province, China. Its taxonomic position was determined by using a polyphasic approach. Strain X12M-4T was catalase- and oxidase-positive. Cells were rod-shaped, 0.5-0.8 microm wide and 1.1-1.6 microm long. Growth was observed in the presence of 0-11.0 % (w/v) NaCl (optimum, 5.0-6.0 %), and at 15-40 degrees C (optimum, 25 degrees C) and pH 6.5-9.5 (optimum, pH 7.0). No growth occurred at 10 degrees C or 45 degrees C. Strain X12M-4T contained C18:1omega7c, C19:0 cyclo omega8c and C16:0 as the major fatty acids (>10.0 %). The predominant respiratory quinone was Q-10. The major polar lipids were phosphatidylcholine (PC), phosphatidylglycerol (PG), diphosphatidglycerol (DPG), an unknown aminolipid and an unidentified lipid. The DNA G+C content was 65.7 mol% (Tm). Strain X12M-4T showed highest 16S rRNA gene sequence similarities to Maritimibacter alkaliphilus HTCC2654T (96.7 %), Roseibacterium elongatum DSM 19469T (96.4 %), Tropicimonas aquimaris DPG-21T (95.6 %), 'Roseibacterium beibuensis' JLT1202rT (95.6 %) and Tropicimonas sediminicola M97T (95.5 %), and <95.5 % to others. Phylogenetic trees based on 16S rRNA gene sequences showed that strain X12M-4T formed a robust cluster with M. alkaliphilus HTCC2654T. Based on the data, it is concluded that strain X12M-4T represents a novel species of the genus Maritimibacter, for which the name Maritimibacter lacisalsi sp. nov. is proposed. The type strain is X12M-4T (= CGMCC 1.12922T= JCM 30555T). To accommodate the new species, the description of the genus Maritimibacter was emended.