Phytochelatins play a key role in arsenic accumulation and tolerance in the aquatic macrophyte Wolffia globosa
文献类型：期刊论文
| 作者 | Zhang, Xin ; Uroic, M. Kalle ; Xie, Wan-Ying ; Zhu, Yong-Guan ; Chen, Bao-Dong ; McGrath, Steve P. ; Feldmann, Joerg ; Zhao, Fang-Jie |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2012 |
| 卷号 | 165页码:18－24 |
| 关键词 | Arsenic Arsenic tolerance Arsenic speciation Phytochelatins Wolffia globosa |
| ISSN号 | 0269-7491 |
| 中文摘要 | The rootless duckweed Wolffia globosa can accumulate and tolerate relatively large amounts of arsenic (As); however, the underlying mechanisms were unknown. W. globosa was exposed to different concentrations of arsenate with or without L-buthionine sulphoximine (BSO), a specific inhibitor of gamma-glutamylcysteine synthetase. Free thiol compounds and As(III)-thiol complexes were identified and quantified using HPLC - high resolution ICP-MS accurate mass ESI-MS. Without BSO, 74% of the As accumulated in the duckweed was complexed with phytochelatins (PCs), with As(III)-PC4 and As(III) -PC3 being the main species. BSO was taken up by the duckweed and partly deaminated. The BSO treatment completely suppressed the synthesis of PCs and the formation of As(III)-PC complexes, and also inhibited the reduction of arsenate to arsenite. BSO markedly decreased both As accumulation and As tolerance in W. globosa. The results demonstrate an important role of PCs in detoxifying As and enabling As accumulation in W. globosa. (C) 2012 Elsevier Ltd. All rights reserved. |
| WOS记录号 | WOS:000303629000003 |
| 公开日期 | 2014-11-05 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/7892]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Zhang, Xin,Uroic, M. Kalle,Xie, Wan-Ying,et al. Phytochelatins play a key role in arsenic accumulation and tolerance in the aquatic macrophyte Wolffia globosa[J]. ENVIRONMENTAL POLLUTION,2012,165:18－24. |
| APA | Zhang, Xin.,Uroic, M. Kalle.,Xie, Wan-Ying.,Zhu, Yong-Guan.,Chen, Bao-Dong.,...&Zhao, Fang-Jie.(2012).Phytochelatins play a key role in arsenic accumulation and tolerance in the aquatic macrophyte Wolffia globosa.ENVIRONMENTAL POLLUTION,165,18－24. |
| MLA | Zhang, Xin,et al."Phytochelatins play a key role in arsenic accumulation and tolerance in the aquatic macrophyte Wolffia globosa".ENVIRONMENTAL POLLUTION 165(2012):18－24. |
入库方式： OAI收割
来源：生态环境研究中心
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