Halorubellus salinus gen. nov., sp nov and Halorubellus litoreus sp nov., novel halophilic archaea isolated from a marine solar saltern----中国科学院微生物研究所

科研成果

论文题目:	Halorubellus salinus gen. nov., sp nov and Halorubellus litoreus sp nov., novel halophilic archaea isolated from a marine solar saltern
作者:	Cui, HL; Mou, YZ; Yang, X; Zhou, YG; Liu, HC; Zhou, PJ
联系作者:	Cui, HL
刊物名称:	SYSTEMATIC AND APPLIED MICROBIOLOGY
期:	1
卷:	35
页:	30-34
年份:	2012
影响因子:	3.366
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摘要:	Two extremely halophilic archaeal strains GX3(T) and GX26(T) were isolated from the Gangxi marine solar saltern near the Weihai city of Shandong Province, China. Cells from the two strains were pleomorphic and stained Gram-negative, colonies were red-pigmented. Strains GX3(T) and GX26(T) were able to grow at 25-50 degrees C (optimum 37 degrees C), at 1.4-5.1 M NaCl (optimum 3.1 M), at pH 5.5-9.5 (optimum pH 7.0) and neither strain required Mg2+ for growth. Cells lyse in distilled water and the minimal NaCl concentration to prevent cell-lysis was 8% (w/v). The major polar lipids of the two strains were PA (phosphatidic acid), PG (phosphatidylglycerol), PGP-Me (phosphatidylglycerol phosphate methyl ester) and three major glycolipids (GL1, GL2 & GL3) chromatographically identical to S-TGD-1 (sulfated galactosyl mannosy glucosyl diether), S-DGD-1 (sulfated mannosyl glucosyl diether), and DGD-1 (mannosyl glucosyl diether) respectively, an unidentified lipid (GL4) was also detected in strain GX26(T). Phylogenetic analysis based on 165 rRNA gene revealed that strain GX3(T) and strain GX26(T) formed a distinct clade with the closest relative, Haladaptatus paucihalophilus (89.9-92.4% and 90.4-92.7, respectively). The rpoB' gene similarities between strains GX3(T) and GX26(T), and between the two strains and the closest relative, Halorussus rams TBN4(T) are 96.5%, 84.3% and 83.9%, respectively. The DNA G+C contents of strain GX3(T) and strain GX26(T) are 67.3 mol% and 67.2 mol%, respectively. The DNA-DNA hybridization value between strain GX3(T) and strain GX26(T) was 44%. The phenotypic, chemotaxonomic and phylogenetic properties suggest that strain GX3(T) and strain GX26(T) represent two novel species in a new genus within the family Halobacteriaceae, Halorubellus salinus gen. nov., sp. nov. (type strain GX3(T) = CGMCC 1.10384(T) = JCM 17115(T)) and Halorubellus litoreus sp. nov. (type strain GX26(T) = CGMCC 1.10386(T) = JCM 17117(T)). (C) 2011 Elsevier GmbH. All rights reserved.