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Arsenic Uptake by Rice Is Influenced by Microbe-Mediated Arsenic Redox Changes in the Rhizosphere
Alternative TitleEnviron. Sci. Technol.
Jia, Yan1,2; Huang, Hai1; Chen, Zheng1; Zhu, Yong-Guan1,3
2014-01-21
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Volume48Issue:2Pages:1001-1007
AbstractArsenic (As) uptake by rice is largely determined by As speciation, which is strongly influenced by microbial activities. However, little is known about interactions between root and rhizosphere microbes, particularly on arsenic oxidation and reduction. In this study, two rice cultivars with different radial oxygen loss (ROL) ability were used to investigate the impact of microbially mediated As redox changes in the rhizosphere on As uptake. Results showed that the cultivar with higher ROL (Yangdao) had lower. As uptake than that with lower ROL (Nongken). The enhancement of the rhizospheric effect on the abundance of the arsenite (As(III)) oxidase gene (aroA-like) was greater than on the arsenate (As(V)) reductase gene (arsC), and As(V) respiratory reductase gene (arrA), resulting in As oxidation and sequestration in the rhizosphere,. particularly for cultivar Yangdao. The community of As(III)-oxidizing bacteria in the rhizosphere was dominated by alpha-Proteobacteria and beta-Proteobacteria and was influenced by rhizospheric effects, rice straw application, growth stage, and cultivar. Application of rice straw into the soil increased As release and accumulation into rice plants. These results highlighted that uptake of As by. rice is influenced by microbial processes, especially As oxidation in the rhizosphere, and these processes are influenced by root ROL and organic matter application.; Arsenic (As) uptake by rice is largely determined by As speciation, which is strongly influenced by microbial activities. However, little is known about interactions between root and rhizosphere microbes, particularly on arsenic oxidation and reduction. In this study, two rice cultivars with different radial oxygen loss (ROL) ability were used to investigate the impact of microbially mediated As redox changes in the rhizosphere on As uptake. Results showed that the cultivar with higher ROL (Yangdao) had lower. As uptake than that with lower ROL (Nongken). The enhancement of the rhizospheric effect on the abundance of the arsenite (As(III)) oxidase gene (aroA-like) was greater than on the arsenate (As(V)) reductase gene (arsC), and As(V) respiratory reductase gene (arrA), resulting in As oxidation and sequestration in the rhizosphere,. particularly for cultivar Yangdao. The community of As(III)-oxidizing bacteria in the rhizosphere was dominated by alpha-Proteobacteria and beta-Proteobacteria and was influenced by rhizospheric effects, rice straw application, growth stage, and cultivar. Application of rice straw into the soil increased As release and accumulation into rice plants. These results highlighted that uptake of As by. rice is influenced by microbial processes, especially As oxidation in the rhizosphere, and these processes are influenced by root ROL and organic matter application.
KeywordOryza-sativa L. Iron Plaque Dissimilatory Arsenate Oxidase Genes Phylogenetic Analysis West-bengal Paddy Soil Reduction Speciation Accumulation
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine
DOI10.1021/es403877s
URL查看原文
Indexed BySCI
Language英语
WOS KeywordORYZA-SATIVA L. ; IRON PLAQUE ; DISSIMILATORY ARSENATE ; OXIDASE GENES ; PHYLOGENETIC ANALYSIS ; WEST-BENGAL ; PADDY SOIL ; REDUCTION ; SPECIATION ; ACCUMULATION
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
WOS IDWOS:000330205000022
Citation statistics
Cited Times:86[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8030
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Jia, Yan,Huang, Hai,Chen, Zheng,et al. Arsenic Uptake by Rice Is Influenced by Microbe-Mediated Arsenic Redox Changes in the Rhizosphere[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2014,48(2):1001-1007.
APA Jia, Yan,Huang, Hai,Chen, Zheng,&Zhu, Yong-Guan.(2014).Arsenic Uptake by Rice Is Influenced by Microbe-Mediated Arsenic Redox Changes in the Rhizosphere.ENVIRONMENTAL SCIENCE & TECHNOLOGY,48(2),1001-1007.
MLA Jia, Yan,et al."Arsenic Uptake by Rice Is Influenced by Microbe-Mediated Arsenic Redox Changes in the Rhizosphere".ENVIRONMENTAL SCIENCE & TECHNOLOGY 48.2(2014):1001-1007.
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