EXAFS study on arsenic species and transformation in arsenic hyperaccumulator
文献类型：SCI/SSCI论文
| 作者 | Lei M. |
| 发表日期 | 2004 |
| 关键词 | hyperaccumulator Cretan brake (Pteris cretica L. var nervosa Thunb) arsenic species EXAFS contaminated soils fern phytochelatins localization speciation tolerance |
| 英文摘要 | Synchrotron radiation extended X-ray absorption fine structure (SR EXAFS) was employed to study the transformation of coordination environment and the redox speciation of arsenic in a newly discovered arsenic hyperaccumulator, Cretan brake (Pteris cretica L. var nervosa Thunb). It showed that the arsenic in the plant mainly coordinated with oxygen, except that some arsenic coordinated with S as As-GSH in root. The complexation of arsenic with GSH might not be the predominant detoxification mechanism in Cretan brake. Although some arsenic in root presented as As(V) in Na2HAsO4 treatments, most of arsenic in plant presented as As(III)-O in both treatments, indicating that As(V) tended to be reduced to As(I 11) after it was taken up into the root, and arsenic was kept as As(III) when it was transported to the above-ground tissues. The reduction of As(V) primarily proceeded in the root. |
| 出处 | Science in China Series C-Life Sciences |
| 卷 | 47 |
| 期 | 2 |
| 页 | 124-129 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1006-9305 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23786]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Lei M.. EXAFS study on arsenic species and transformation in arsenic hyperaccumulator. 2004. |
入库方式： OAI收割
来源：地理科学与资源研究所
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