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Microbial community structure with trends in methylation gene diversity and abundance in mercury-contaminated rice paddy soils in Guizhou, China
Vishnivetskaya Tatiana A.;  Hu Haiyan;  Van Nostrand, Joy D.;  Wymore, Ann?M.;  Xu Xiaohang;  Qiu Guangle;  Feng Xinbin;  Zhou Jizhong;  Brown, Steven D.;  Brandt, Craig C.;  Podar, Mircea;  Gu Baohua;  Elias, Dwayne A.
2018
Source PublicationEnvironmental Science: Processes & Impacts
Volume20Issue:4Pages:673-685
Abstract

Paddy soils from mercury (Hg)-contaminated rice fields in Guizhou, China were studied with respect to total mercury (THg) and methylmercury (MeHg) concentrations as well as Bacterial and Archaeal community composition. Total Hg (0.25-990 mu g g(-1)) and MeHg (1.3-30.5 mu g g(-1)) varied between samples. Pyrosequencing (454 FLX) of the hypervariable v1-v3 regions of the 16S rRNA genes showed that Proteobacteria, Actinobacteria, Chloroflexi, Acidobacteria, Euryarchaeota, and Crenarchaeota were dominant in all samples. The Bacterial alpha-diversity was higher in samples with relatively Low THg and MeHg and decreased with increasing THg and MeHg concentrations. In contrast, Archaeal alpha-diversity increased with increasing of MeHg concentrations but did not correlate with changes in THg concentrations. Overall, the methylation gene hgcAB copy number increased with both increasing THg and MeHg concentrations. The microbial communities at High THg and High MeHg appear to be adapted by species that are both Hg resistant and carry hgcAB genes for MeHg production. The relatively high abundance of both sulfate-reducing delta-Proteobacteria and methanogenic Archaea, as well as their positive correlations with increasing THg and MeHg concentrations, suggests that these microorganisms are the primary Hg-methylators in the rice paddy soils in Guizhou, China.

Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8804
Collection环境地球化学国家重点实验室
Affiliation1.Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6036, USA
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China
3.Department of Microbiology and Plant Biology, University of Oklahoma, Norman, Oklahoma 73019, USA
Recommended Citation
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Vishnivetskaya Tatiana A.;Hu Haiyan;Van Nostrand, Joy D.;Wymore, Ann?M.;Xu Xiaohang;Qiu Guangle;Feng Xinbin;Zhou Jizhong;Brown, Steven D.;Brandt, Craig C.;Podar, Mircea;Gu Baohua;Elias, Dwayne A.. Microbial community structure with trends in methylation gene diversity and abundance in mercury-contaminated rice paddy soils in Guizhou, China[J]. Environmental Science: Processes & Impacts,2018,20(4):673-685.
APA Vishnivetskaya Tatiana A.;Hu Haiyan;Van Nostrand, Joy D.;Wymore, Ann?M.;Xu Xiaohang;Qiu Guangle;Feng Xinbin;Zhou Jizhong;Brown, Steven D.;Brandt, Craig C.;Podar, Mircea;Gu Baohua;Elias, Dwayne A..(2018).Microbial community structure with trends in methylation gene diversity and abundance in mercury-contaminated rice paddy soils in Guizhou, China.Environmental Science: Processes & Impacts,20(4),673-685.
MLA Vishnivetskaya Tatiana A.;Hu Haiyan;Van Nostrand, Joy D.;Wymore, Ann?M.;Xu Xiaohang;Qiu Guangle;Feng Xinbin;Zhou Jizhong;Brown, Steven D.;Brandt, Craig C.;Podar, Mircea;Gu Baohua;Elias, Dwayne A.."Microbial community structure with trends in methylation gene diversity and abundance in mercury-contaminated rice paddy soils in Guizhou, China".Environmental Science: Processes & Impacts 20.4(2018):673-685.
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