Reductive dechlorination of polychlorinated biphenyls is coupled to nitrogen fixation by a legume-rhizobium symbiosis | |
Tu, Chen1; Luo, Yongming1,2; Teng, Ying2; Christie, Peter2 | |
刊名 | SCIENCE CHINA-EARTH SCIENCES |
2018-03-01 | |
卷号 | 61期号:3页码:285-291 |
关键词 | Biogeochemical Cycling Legume-rhizobia Symbiosis Microbe-assisted Phytoremediation Nitrogen Fixation Polychlorinated Biphenyls Soil Pollution And Remediation Reductive Dechlorination |
ISSN号 | 1674-7313 |
DOI | 10.1007/s11430-017-9131-9 |
文献子类 | Article |
英文摘要 | Chlorinated persistent organic pollutants, including polychlorinated biphenyls (PCBs), represent a particularly serious environmental problem and human health risk worldwide. Leguminous plants and their symbiotic bacteria (rhizobia) are important components of the biogeochemical cycling of nitrogen in both agricultural and natural ecosystems. However, there have been relatively few detailed studies of the remediation of PCB-contaminated soils by legume-rhizobia symbionts. Here we report for the first time evidence of the reductive dechlorination of 2,4,4'-trichlorobiphenyl (PCB 28) by an alfalfa-rhizobium nitrogen fixing symbiont. Alfalfa (Medicago sativa L.) inoculated with wild-type Sinorhizobium meliloti had significantly larger biomass and PCB 28 accumulation than alfalfa inoculated with the nitrogenase negative mutant rhizobium SmY. Dechlorination products of PCB 28, 2,4'-dichlorobiphenyl (PCB 8), and the emission of chloride ion (Cl-) were also found to decrease significantly in the ineffective nodules infected by the mutant strain SmY. We therefore hypothesize that N2-fixation by the legume-rhizobium symbiont is coupled with the reductive dechlorination of PCBs within the nodules. The combination of these two processes is of great importance to the biogeochemical cycling and bioremediation of organochlorine pollutants in terrestrial ecosystems. |
学科主题 | 环境科学 |
URL标识 | 查看原文 |
资助项目 | National Natural Science Foundation of China |
WOS关键词 | Sinorhizobium-meliloti ; Organic Pollutants ; Contaminated Soil ; Phytoremediation ; Pcbs ; Bioremediation ; Degradation ; Biodegradation ; Remediation ; Alfalfa |
WOS研究方向 | Geology |
语种 | 英语 |
WOS记录号 | WOS:000426574800004 |
内容类型 | 期刊论文 |
源URL | [http://ir.yic.ac.cn/handle/133337/23579] |
专题 | 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 |
通讯作者 | Luo, Yongming |
作者单位 | 1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat 2.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat |
推荐引用方式 GB/T 7714 | Tu, Chen,Luo, Yongming,Teng, Ying,et al. Reductive dechlorination of polychlorinated biphenyls is coupled to nitrogen fixation by a legume-rhizobium symbiosis[J]. SCIENCE CHINA-EARTH SCIENCES,2018,61(3):285-291. |
APA | Tu, Chen,Luo, Yongming,Teng, Ying,&Christie, Peter.(2018).Reductive dechlorination of polychlorinated biphenyls is coupled to nitrogen fixation by a legume-rhizobium symbiosis.SCIENCE CHINA-EARTH SCIENCES,61(3),285-291. |
MLA | Tu, Chen,et al."Reductive dechlorination of polychlorinated biphenyls is coupled to nitrogen fixation by a legume-rhizobium symbiosis".SCIENCE CHINA-EARTH SCIENCES 61.3(2018):285-291. |
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