First evidence on different transportation modes of arsenic and phosphorus in arsenic hyperaccumulator Pteris vittata
文献类型：SCI/SSCI论文
| 作者 | Lei M. |
| 发表日期 | 2012 |
| 关键词 | Arsenic hyperaccumulator Micro-XANES Phosphate Pteris vittata L. SRXRF phosphate transporters holcus-lanatus accumulation plant speciation roots absorption fern l. transformation |
| 英文摘要 | Arsenic (As) reduction and translocation are key processes for As hyperaccumulation by the hyperaccumulator Pteris vittata L Micro-X-ray adsorption spectroscopy of P. vittata's rhizoid tissues revealed that As reduction mainly occurred in endodermis during translocation from epidermis to vascular bundle. Prior to reduction, arsenate (As (V)) translocation was an active process requiring energy and employing a phosphate (P) transporter. Use of a synchrotron X-ray microprobe showed that As (V) and P were cotransported and that this process could be enhanced by As (V) exposure or P deficiency but restrained by energy release inhibition caused by 2,4-dinitrophenol or sodium orthovanadate. In contrast, after As reduction, As(III) translocation differed from P translocation and was more efficient, appearing free from the apparent endodermal blockage. The results here revealed the role of the P transporter on As translocation as well as the key role of As reduction in As hyperaccumulation by P. vittata. (C) 2011 Elsevier Ltd. All rights reserved. |
| 出处 | Environmental Pollution |
| 卷 | 161 |
| 页 | 1-7 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0269-7491 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/26881]  |
| 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.. First evidence on different transportation modes of arsenic and phosphorus in arsenic hyperaccumulator Pteris vittata. 2012. |
入库方式： OAI收割
来源：地理科学与资源研究所
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