Identification of potential electrotrophic microbial community in paddy soils by enrichment of microbial electrolysis cell biocathodes

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Identification of potential electrotrophic microbial community in paddy soils by enrichment of microbial electrolysis cell biocathodes
	Li, Xiaomin; Ding, Longjun; Yuan, Haiyan; Li, Xiaoming; Zhu, Yongguan
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2020-01
卷号	87 页码:411-420
关键词	Electrotroph Paddy soil Microbial electrolysis cell Microbial community Soil property
ISSN号	1001-0742
英文摘要	Electrotrophs are microbes that can receive electrons directly from cathode in a microbial electrolysis cell (MEC). They not only participate in organic biosynthesis, but also be crucial in cathode-based bioremediation. However, little is known about the electrotrophic community in paddy soils. Here, the putative electrotrophs were enriched by cathodes of MECs constructed from five paddy soils with various properties using bicarbonate as an electron acceptor, and identified by 16S rRNA-gene based Illumina sequencing. The electrons were gradually consumed on the cathodes, and 25%-45% of which were recovered to reduce bicarbonate to acetic acid during MEC operation. Firmicutes was the dominant bacterial phylum on the cathodes, and Bacillus genus within this phylum was greatly enriched and was the most abundant population among the detected putative electrotrophs for almost all soils. Furthermore, several other members of Firmicutes and Proteobacteria may also participate in electrotrophic process in different soils. Soil pH, amorphous iron and electrical conductivity significantly influenced the putative electrotrophic bacterial community, which explained about 33.5% of the community structural variation. This study provides a basis for understanding the microbial diversity of putative electrotrophs in paddy soils, and highlights the importance of soil properties in shaping the community of putative electrotrophs. (c) 2019 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44335]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Li, Xiaomin,Ding, Longjun,Yuan, Haiyan,et al. Identification of potential electrotrophic microbial community in paddy soils by enrichment of microbial electrolysis cell biocathodes[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2020,87:411-420.
APA	Li, Xiaomin,Ding, Longjun,Yuan, Haiyan,Li, Xiaoming,&Zhu, Yongguan.(2020).Identification of potential electrotrophic microbial community in paddy soils by enrichment of microbial electrolysis cell biocathodes.JOURNAL OF ENVIRONMENTAL SCIENCES,87,411-420.
MLA	Li, Xiaomin,et al."Identification of potential electrotrophic microbial community in paddy soils by enrichment of microbial electrolysis cell biocathodes".JOURNAL OF ENVIRONMENTAL SCIENCES 87(2020):411-420.