Abundance and Diversity of Sulfur-Oxidizing Bacteria along a Salinity Gradient in Four Qinghai-Tibetan Lakes, China

ISL OpenIR > 青海盐湖研究所知识仓储

	Abundance and Diversity of Sulfur-Oxidizing Bacteria along a Salinity Gradient in Four Qinghai-Tibetan Lakes, China
	Yang, Jian 1; Jiang, Hongchen 1; Dong, Hailiang 1,2; Wu, Geng 1; Hou, Weiguo 3; Zhao, Wanyu 3; Sun, Yongjuan 4; Lai, Zhongping 4
	2013-10-21
发表期刊	GEOMICROBIOLOGY JOURNAL
卷号	30 期号:9 页码:851-860
关键词	Qinghai-tibetan Lakes Sulfur-oxidizing Bacteria Sulfur Cycle Soxb
摘要	Sulfur-oxidizing bacteria (SOB) play important roles in the sulfur cycle and are widespread in a number of environments, but their occurrence and relationship to geochemical conditions in (hyper)saline lakes are still poorly understood. In this study, the abundance and diversity of SOB populations were investigated in four Qinghai-Tibetan lakes (Erhai Lake, Gahai Lake 1, Gahai Lake 2 and Xiaochaidan Lake) by using quantitative polymerase chain reaction (qPCR) and soxB gene- (encoding sulfate thiohydrolase) based phylogenectic analyses. qPCR analyses showed that in the studied lakes, the total bacterial 16S rRNA and soxB gene abundances in the sediments were distinctly higher than in the overlying waters. The 16S rRNA gene abundance in the waters ranged 5.27 x 10(6)-6.09 x 10(8) copies per mL and 7.39 x 10(10)-2.9 x 10(11) copies per gram sediment. The soxB gene abundance in the waters ranged from 1.88 x 10(4) to 5.21 x 10(5) per mL and 4.73 x 10(6)-2.65 x 10(7) copies per gram sediment. The soxB gene in the waters of the two hypersaline lakes (Gahai Lake 2 and Xiaochaidan Lake) was more abundant (2.97 x 10(5) and 5.21 x 10(5) copies per mL) than that in the two low-salinity lakes (1.88 x 10(4) and 3.36 x 10(4) copies per mL). Phylogenetic analysis showed that Alpha- and Betaproteobacteria were dominant SOB in the investigated lakes, and the composition of proteobacterial subgroups varied with salinity: in freshwater Erhai Lake and low-salinity Gahai Lake 1, the SOB populations were dominated by the Betaproteobacteria, whereas in hypersaline Lake Gahai 2 and Xiaochaidan Lake, the SOB populations were dominated by Alphaproteobacteria. Overall, salinity played a key role in controlling the diversity and distribution of SOB populations in the investigated Qinghai-Tibetan lakes.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/4451
专题	青海盐湖研究所知识仓储中国科学院青海盐湖研究所
作者单位	1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China 2.Miami Univ, Dept Geol & Environm Earth Sci, Oxford, OH 45056 USA 3.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing, Peoples R China 4.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining, Peoples R China
推荐引用方式 GB/T 7714	Yang, Jian,Jiang, Hongchen,Dong, Hailiang,et al. Abundance and Diversity of Sulfur-Oxidizing Bacteria along a Salinity Gradient in Four Qinghai-Tibetan Lakes, China[J]. GEOMICROBIOLOGY JOURNAL,2013,30(9):851-860.
APA	Yang, Jian.,Jiang, Hongchen.,Dong, Hailiang.,Wu, Geng.,Hou, Weiguo.,...&Lai, Zhongping.(2013).Abundance and Diversity of Sulfur-Oxidizing Bacteria along a Salinity Gradient in Four Qinghai-Tibetan Lakes, China.GEOMICROBIOLOGY JOURNAL,30(9),851-860.
MLA	Yang, Jian,et al."Abundance and Diversity of Sulfur-Oxidizing Bacteria along a Salinity Gradient in Four Qinghai-Tibetan Lakes, China".GEOMICROBIOLOGY JOURNAL 30.9(2013):851-860.