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Isolation and Characterization of Paraquat-Degrading Extracellular Humus-Reducing Bacteria from Vegetable Field

文献类型： 会议论文

第一作者： Chunyuan Wu

作者： Chunyuan Wu 1 ; Jinkun Liu 1 ; Shanshan Chen 2 ; Xiao Deng 1 ; Qinfen Li 1 ;

作者机构： 1.Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences

2.College of Environment and Plant Protection, Hainan University

关键词： Paraquat;Humus-reducing Bacteria;Anaerobic degradation;Extracellular electron transfer

会议名称： International Conference on Advances in Energy and Environmental Science

主办单位：

页码： 1012-1016

摘要： The aim of this paper is to isolate pure cultures that are capable of degrading paraquat (PQ) anaerobically with humic substances (humus) as the sole electron acceptor. Three facultative anaerobic bacteria (PQ-1, PQ-2, and PQ-3) were successively isolated from vegetable soil in Sanya city, China, via enrichment procedure with PQ and anthraquinone-2,6-disulphonate (AQDS) under anaerobic conditions. Batch experiments were conducted to investigate isolates' PQ anaerobic degradation activity. Results showed that three strains were all capable of degrading PQ directly with AQDS as the sole electron acceptor (18.6% removal within 48h), and the microbial process might be AQDS dependent. The addition of low molecular weight organic substrate, such as sucrose, could enhance the anaerobic degradation of PQ from 18.6% to 34.2%, and the degradation rate reached 100% after 5-day incubation. This study was the first paper reporting that pure cultures have the ability to an aerobically degrade PQ with AQDS as the sole electron acceptor.

分类号： x37-53

  • 相关文献

[1]Isolation and Characterization of Paraquat-Degrading Extracellular Humus-Reducing Bacteria from Vegetable Field. Wu, Chunyuan,Liu, Jinkun,Deng, Xiao,Li, Qinfen,Chen, Shanshan,Wu, Chunyuan,Liu, Jinkun,Deng, Xiao,Li, Qinfen. 2013

[2]Mechanisms and Applications of Electron Shuttle-Mediated Extracellular Electron Transfer. Ma Jinlian,Ma Jinlian,Tang Jia,Zhou Shungui,Zhuang Li,Ma Chen. 2015

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