Impacts of sulfur regulation in vivo on arsenic accumulation and tolerance of hyperaccumulator Pteris vittata
文献类型：SCI/SSCI论文
| 作者 | Lei M. |
| 发表日期 | 2013 |
| 关键词 | Arsenic hyperaccumulator BSO (L-buthionine-sulfoximine) OAS (O-acetyl-L-serine) Pteris vittata Sulfur XAFS (X-ray absorption fine structure) chinese brake fern glutathione plants transport roots l. phytochelatins biosynthesis reduction responses |
| 英文摘要 | The impacts of the regulation of sulfur (S) metabolism in vivo on arsenic (As) and S species and on As accumulation by Pteris vittata L were investigated using a synchrotron-based X-ray-absorption fine structure method. The S assimilation inhibitor L-buthionine-sulfoximine (BSO) markedly inhibited As reduction, doubling arsenate (As(V)) content in P. vittata rhizoids. The resulting As transport blockage in rhizoids, decreased As movement to aboveground tissues by 47%. The significant impact of BSO demonstrated the vital role of sulfhydryl groups (-SH) as reductants in As(V) reduction and confirmed the importance of As(V) reduction in As accumulation in this fern. The S metabolism accelerant O-acetyl-L-serine resulted in the appearance of large amounts of As-SH in rhizoids and had no obvious impact on As accumulation, but with As stress conditions, effectively increased plant biomass, possibly through chelation of excess As with -SH. Thus, -SH appeared able to act as both a reductant and a chelator of As in P. vittata, and the ratio of -SH to As may have been a factor that determined the specific role of -SH in P. vittata under these conditions. (C) 2012 Elsevier B.V. All rights reserved. |
| 出处 | Environmental and Experimental Botany |
| 卷 | 85 |
| 页 | 1-6 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0098-8472 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30463]  |
| 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.. Impacts of sulfur regulation in vivo on arsenic accumulation and tolerance of hyperaccumulator Pteris vittata. 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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