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题名: Arsenic modulates the composition of anode-respiring bacterial community during dry-wet cycles in paddy soils
作者: Wang, Ya-Jie; Chen, Zheng; Liu, Pan-Pan; Sun, Guo-Xin; Ding, Long-Jun; Zhu, Yong-Guan
刊名: JOURNAL OF SOILS AND SEDIMENTS
出版日期: 2016-06
卷号: 16, 期号:6, 页码:1745-1753
关键词: Anode respiring bacteria ; Arsenic ; Dry-wet cycles ; Paddy soils
DOI: 10.1007/s11368-016-1369-6
部门归属: 城市与区域生态国家重点实验室
英文摘要: Bacteria able to extracelluar respiration, which could be enriched in the anode of microbial fuel cells (MFCs), play important roles in dissimilatory iron reduction and arsenic (As) desorption in paddy soils. However, the response of the bacteria to As pollution is unknown. Using soil MFCs to investigate the effects of As on anode respiring bacteria (ARB) communities in paddy soils exposed to As stress. The soil MFC performances were evaluated by electrochemical methods. The bacterial community compositions on anodes were studied using Illumina sequencing. In wet 1 phase, polarization curves of MFCs showed cathode potentials were enhanced at low As exposure but inhibited at high As exposure. In the meantime, anode potentials increased with As levels. The dry-wet alternation reduced As levels in porewater and their impacts on electrodes microorganisms. Arsenic addition significantly influenced the anode microbial communities. After dry-wet cycles, Deltaproteobacteria dominated in the anode with high As. The dynamic changes of the communities on cathodes and anodes of soil MFCs in paddy soils with different As addition might be explained by their different mechanisms for As detoxification. These results provide new insights into the microbial evolution in As-contaminated paddy soils.
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35528
Appears in Collections:城市与区域生态国家重点实验室_期刊论文

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