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Abundance and Diversity of Sulfur-Oxidizing Bacteria along a Salinity Gradient in Four Qinghai-Tibetan Lakes, China
Yang, Jian1; Jiang, Hongchen1; Dong, Hailiang1,2; Wu, Geng1; Hou, Weiguo3; Zhao, Wanyu3; Sun, Yongjuan4; Lai, Zhongping4
2013-10-21
Source PublicationGEOMICROBIOLOGY JOURNAL
Volume30Issue:9Pages:851-860
SubtypeArticle
AbstractSulfur-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.
KeywordQinghai-tibetan Lakes Sulfur-oxidizing Bacteria Sulfur Cycle Soxb
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
WOS KeywordDENITRIFICANS GEN. NOV. ; IN-SITU HYBRIDIZATION ; MICROBIAL DIVERSITY ; HYPERSALINE LAKES ; SOXB GENE ; SODA LAKE ; COMMUNITY COMPOSITION ; NORTHWESTERN CHINA ; MOLECULAR ANALYSIS ; SEDIMENTS
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology ; Geology
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary
WOS IDWOS:000322307800007
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Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/4451
Collection青海盐湖研究所知识仓储
Affiliation1.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
Recommended Citation
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.
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