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; Teng, Ying(Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China); Luo, Yongming(Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China)
2018-02-20
发表期刊ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
卷号52期号:4页码:2217-2224
产权排序第2完成单位
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.
DOI10.1021/acs.est.7b05667
项目资助者National Natural Science Foundation of China(41371309, 41671327, 41230858) ; Outstanding Youth Fund of Jiangsu Province(BK20150049) ; ARC DECRA Fellowship(DE170100310)
URL查看原文
收录类别SCI
关键词[WOS]ZEA-MAYS L. ; POLYCHLORINATED-BIPHENYLS ; OXIDATIVE STRESS ; PHANEROCHAETE-CHRYSOSPORIUM ; SINORHIZOBIUM-MELILOTI ; MEDICAGO-TRUNCATULA ; NITRATE REDUCTASE ; MOLYBDENUM ; ALFALFA ; SOILS
文章类型Article
语种英语
WOS研究方向Engineering ; Environmental Sciences & Ecology
WOS记录号WOS:000426143300059
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/23577
专题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; Teng, Ying(Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China); Luo, Yongming(Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China)
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
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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.,...&Luo, Yongming.(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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