Coupling between Nitrogen Fixation and Tetrachlorobiphenyl Dechlorination in a Rhizobium-Legume Symbiosis | |
Wang, Xiaomi1,4; Teng, Ying1; Tu, Chen2; Luo, Yongming1,2; Greening, Chris3; Zhang, Ning1; Dai, Shixiang1,4; Ren, Wenjie1; Zhao, Ling1; Li, Zhengao1 | |
刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY |
2018-02-20 | |
卷号 | 52期号:4页码:2217-2224 |
ISSN号 | 0013-936X |
DOI | 10.1021/acs.est.7b05667 |
文献子类 | Article |
英文摘要 | Legume-rhizobium symbioses have the potential to remediate soils contaminated with chlorinated organic compounds. Here, the model symbiosis between Medicago sativa and Sinorhizobium meliloti was used to explore the relationships between symbiotic nitrogen fixation and transformation of tetrachlorobiphenyl PCB 77 within this association. 45-day-old seedlings in vermiculite were pretreated with 5 mg L-1 PCB 77 for 5 days. In PCB-supplemented nodules, addition of the nitrogenase enhancer molybdate significantly stimulated dechlorination by 7.2-fold and reduced tissue accumulation of PCB 77 (roots by 96% and nodules by 93%). Conversely, dechlorination decreased in plants exposed to a nitrogenase inhibitor (nitrate) or harboring nitrogenase-deficient symbionts (nifA mutant) by 29% and 72%, respectively. A range of dechlorinated products (biphenyl, methylbiphenyls, hydroxylbiphenyls, and trichlorobiphenyl derivatives) were detected within nodules and roots under nitrogen-fixing conditions. Levels of nitrogenase-derived hydrogen and leghemoglobin expression correlated positively with nodular dechlorination rates, suggesting a more reducing environment promotes PCB dechlorination. Our findings demonstrate for the first time that symbiotic nitrogen fixation acts as a driving force for tetrachlorobiphenyl dechlorination. In turn, this opens new possibilities for using rhizobia to enhance phytoremediation of halogenated organic compounds. |
URL标识 | 查看原文 |
WOS关键词 | Zea-mays L. ; Polychlorinated-biphenyls ; Oxidative Stress ; Phanerochaete-chrysosporium ; Sinorhizobium-meliloti ; Medicago-truncatula ; Nitrate Reductase ; Molybdenum ; Alfalfa ; Soils |
WOS研究方向 | Engineering ; Environmental Sciences & Ecology |
语种 | 英语 |
WOS记录号 | WOS:000426143300059 |
资助机构 | National Natural Science Foundation of China(41371309, 41671327, 41230858) ; Outstanding Youth Fund of Jiangsu Province(BK20150049) ; ARC DECRA Fellowship(DE170100310) |
内容类型 | 期刊论文 |
源URL | [http://ir.yic.ac.cn/handle/133337/23577] |
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 | Teng, Ying; Luo, Yongming |
作者单位 | 1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China 3.Monash Univ, Sch Biol Sci, Clayton, Vic 3800, Australia 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Xiaomi,Teng, Ying,Tu, Chen,et al. Coupling between Nitrogen Fixation and Tetrachlorobiphenyl Dechlorination in a Rhizobium-Legume Symbiosis[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2018,52(4):2217-2224. |
APA | Wang, Xiaomi.,Teng, Ying.,Tu, Chen.,Luo, Yongming.,Greening, Chris.,...&Li, Zhengao.(2018).Coupling between Nitrogen Fixation and Tetrachlorobiphenyl Dechlorination in a Rhizobium-Legume Symbiosis.ENVIRONMENTAL SCIENCE & TECHNOLOGY,52(4),2217-2224. |
MLA | Wang, Xiaomi,et al."Coupling between Nitrogen Fixation and Tetrachlorobiphenyl Dechlorination in a Rhizobium-Legume Symbiosis".ENVIRONMENTAL SCIENCE & TECHNOLOGY 52.4(2018):2217-2224. |
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