Humic analog AQDS and AQS as an electron mediator can enhance chromate reduction by Bacillus sp strain 3C(3)
Hong, YG; Wu, P; Li, WR; Gu, JG; Duan, SS; yghong@scsio.ac.cn
2012
发表期刊APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
ISSN0175-7598
卷号93期号:6页码:2661-2668
摘要Humus as an electron mediator is recognized as an effective strategy to improve the biological transformation and degradation of toxic substances, yet the action of humus in microbial detoxification of chromate is still unknown. In this study, a humus-reducing strain 3C(3) was isolated from mangrove sediment. Based on the analyses of morphology, physiobiochemical characteristics, and 16S rRNA gene sequence, this strain was identified Bacillus sp. Strain 3C(3) can effectively reduce humic analog anthraquinone-2,6-disulfonate (AQDS) and anthraquinone-2-sulfonate (AQS) with lactate, formate, or glucose as electron donors. When the cells were killed by incubation at 95A degrees C for 30 min or an electron donor was absent, the humic reduction did not occur, showing that the humic reduction was a biochemical process. However, strain 3C(3) had low capability of chromate reduction under anaerobic conditions, despite of having strong tolerance of the toxic metal. But in the presence of humic substances AQDS or AQS, we found that chromate reduction by strain 3C(3) was enhanced greatly. Because strain 3C(3) is an effective humus-reducing bacterium, it is proposed that humic substances could serve as electron mediator to interact with chromate and accelerate chromate reduction. Our results suggest that chromate contaminations can be detoxified by adding humic analog (low to 0.1 mM) as an electron mediator in the microbial incubation.
部门归属[Hong, Yiguo; Wu, Peng] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Wu, Peng; Li, Wenru; Gu, Jiguang; Duan, Shunshan] Jinan Univ, Inst Hydrobiol, Guangzhou 510632, Guangdong, Peoples R China; [Li, Wenru] Guangdong Inst Microbiol, Guangdong Open Lab Appl Microbiol, Guangzhou 510070, Guangdong, Peoples R China
关键词Humic Reduction Electron Mediator Chromate Reduction Bacillus Sp Strain 3c(3)
学科领域Biotechnology & Applied Microbiology
语种英语
资助项目LTO
WOS记录号WOS:000301181600042
引用统计
被引频次:12[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10209
专题热带海洋环境国家重点实验室(LTO)
通讯作者yghong@scsio.ac.cn
推荐引用方式
GB/T 7714
Hong, YG,Wu, P,Li, WR,et al. Humic analog AQDS and AQS as an electron mediator can enhance chromate reduction by Bacillus sp strain 3C(3)[J]. APPLIED MICROBIOLOGY AND BIOTECHNOLOGY,2012,93(6):2661-2668.
APA Hong, YG,Wu, P,Li, WR,Gu, JG,Duan, SS,&yghong@scsio.ac.cn.(2012).Humic analog AQDS and AQS as an electron mediator can enhance chromate reduction by Bacillus sp strain 3C(3).APPLIED MICROBIOLOGY AND BIOTECHNOLOGY,93(6),2661-2668.
MLA Hong, YG,et al."Humic analog AQDS and AQS as an electron mediator can enhance chromate reduction by Bacillus sp strain 3C(3)".APPLIED MICROBIOLOGY AND BIOTECHNOLOGY 93.6(2012):2661-2668.
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