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嗜盐盐球菌新种,从盐湖中分离得到。

Jeotgalicoccus halophilus sp. nov., isolated from salt lakes.

作者信息

Liu Wen-Yan, Jiang Lin-Lin, Guo Chun-Jing, Yang Su Sheng

机构信息

National Engineering Lab. of Biohydrometallurgy, General Research Institute for Nonferrous Metals, Beijing 100088, PR China.

Department of Microbiology and Immunology, College of Biological Sciences, China Agricultural University, Key Laboratory for Agro-Microbial Resource and Application, Ministry of Agriculture, Beijing 100193, PR China.

出版信息

Int J Syst Evol Microbiol. 2011 Jul;61(Pt 7):1720-1724. doi: 10.1099/ijs.0.022251-0. Epub 2010 Aug 27.

Abstract

Two slightly halophilic bacterial strains, C1-52(T) and YD-9, were isolated from Daban and Aiding salt lakes in Xinjiang, China, respectively. The isolates were gram-positive, non-endospore-forming, non-motile, facultatively anaerobic cocci. Colonies were pale yellow, and a light pink, diffusible pigment was produced after a few additional days of incubation. The isolates grew optimally with 2-3 % (w/v) NaCl, at pH 7.5 and at 30-35 °C. The peptidoglycan type was L-Lys-Gly(3-4)-L-Ala(Gly). The menaquinones were MK-7 (83.2 %) and MK-6 (16.8 %). The major fatty acids (>10 %) were anteiso-C(15 : 0) and iso-C(15 : 0). The DNA G+C content of strains C1-52(T) and YD-9 was 41.2 and 41.0 mol%, respectively. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strains C1-52(T) and YD-9 were closely related to Jeotgalicoccus psychrophilus YKJ-115(T) (98.0 and 97.1 % 16S rRNA gene sequence similarity, respectively), followed by Jeotgalicoccus halotolerans YKJ-101(T) (97.1 and 96.8 %). Strains C1-52(T) and YD-9 shared, respectively, 20 and 11 % DNA-DNA relatedness with J. halotolerans JCM 11198(T) and 8 and 13 % with J. psychrophilus JCM 11199(T). DNA-DNA relatedness between the isolates was 91 %. On the basis of phenotypic and phylogenetic distinctiveness, strains C1-52(T) and YD-9 belonged to the same species, which should be placed in the genus Jeotgalicoccus as a novel species. The name Jeotgalicoccus halophilus sp. nov. is proposed, with the type strain C1-52(T) ( = CGMCC 1.8911(T)  = NBRC 105788(T)).

摘要

从中国新疆的达坂盐湖和艾丁湖分别分离出两株轻度嗜盐细菌菌株,C1-52(T) 和 YD-9。分离菌株为革兰氏阳性、不形成芽孢、无运动性、兼性厌氧球菌。菌落呈淡黄色,培养几天后会产生浅粉色、可扩散的色素。分离菌株在含2-3%(w/v)NaCl、pH 7.5以及30-35°C条件下生长最佳。肽聚糖类型为L-Lys-Gly(3-4)-L-Ala(Gly)。甲基萘醌为MK-7(83.2%)和MK-6(16.8%)。主要脂肪酸(>10%)为anteiso-C(15:0)和iso-C(15:0)。菌株C1-52(T)和YD-9的DNA G+C含量分别为41.2和41.0 mol%。基于16S rRNA基因序列的系统发育分析表明,菌株C1-52(T)和YD-9与嗜冷嗜盐球菌YKJ-115(T)密切相关(16S rRNA基因序列相似性分别为98.0%和97.1%),其次是耐盐嗜盐球菌YKJ-101(T)(97.1%和96.8%)。菌株C1-52(T)和YD-9与耐盐嗜盐球菌JCM 11198(T)的DNA-DNA相关性分别为20%和11%,与嗜冷嗜盐球菌JCM 11199(T)的DNA-DNA相关性分别为8%和13%。分离菌株之间的DNA-DNA相关性为91%。基于表型和系统发育的独特性,菌株C1-52(T)和YD-9属于同一物种,应作为一个新物种归入嗜盐球菌属。提出新物种嗜盐嗜盐球菌的名称,模式菌株为C1-52(T)(=CGMCC 1.8911(T)=NBRC 105788(T))。

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