Role of chelant on cu distribution and speciation in lolium multiflorum by synchrotron techniques
文献类型：期刊论文
| 作者 | Zhao, Yan-ping1; Cui, Jin-li1; Chan, Ting-shan2; Dong, Jun-cai3; Chen, Dong-liang3; Li, Xiang-dong1 |
| 刊名 | Science of the total environment
 |
| 出版日期 | 2018-04-15 |
| 卷号 | 621页码:772-781 |
| ISSN号 | 0048-9697 |
| 关键词 | Copper Edds Phytoextraction Micro xrf X-ray absorption spectroscopy |
| DOI | 10.1016/j.scitotenv.2017.11.189 |
| 通讯作者 | Li, xiang-dong(cexdli@polyu.edu.hk) |
| 英文摘要 | Chelants are known to enhance metal translocation in plants; however, the underlying mechanisms are still not fully understood. this study aimed to elucidate the distribution and speciation of cu in ryegrass (lolium multiflorum) in both absence and presence of the biodegradable chelant [s, s']-ethylenediamine disuccinic acid (edds). the results showed that edds increased the cu translocation factor from root to shoot by 6-9 folds under cuedds in comparison with free cu (50-250 mu m). synchrotron-based microscopic x-ray fluorescence (mu-xrf) mapping revealed that edds alleviated cu deposition in the root meristem of root apex and the junction of lateral root zone, and facilitated cu transport to root stele for subsequent translocation upwards. x-ray absorption near edge structure (xanes) analysis found that free cu was sequestered in plants as a mixture of cu-organic ligands. in the edds treatment, cu was primarily present as cuedds (49-67%) in plants with partial chemical transformation to cu-histidine (21-36%) and cu(i)-glutathione (0-24%). these results suggest that edds improves internal cu mobility through forming cuedds, thus decreasing the root sequestration of cu, and ultimately facilitating cu transport to plant shoots. (c) 2017 elsevier b.v. all rights reserved. |
| WOS关键词 | RAY-ABSORPTION SPECTROSCOPY ; ETHYLENEDIAMINEDISUCCINIC ACID EDDS ; METAL-CONTAMINATED SOILS ; BRASSICA-CARINATA ; ELSHOLTZIA-SPLENDENS ; HEAVY-METALS ; ENHANCED PHYTOEXTRACTION ; SPATIAL-DISTRIBUTION ; COPPER UPTAKE ; MU-XRF |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000424196800078 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2177983 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Li, Xiang-dong |
| 作者单位 | 1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China 2.Natl Synchrotron Radiat Res Ctr, 101 Hsin Ann Rd,Hsinchu Sci Pk, Hsinchu 30076, Taiwan 3.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Yan-ping,Cui, Jin-li,Chan, Ting-shan,et al. Role of chelant on cu distribution and speciation in lolium multiflorum by synchrotron techniques[J]. Science of the total environment,2018,621:772-781. |
| APA | Zhao, Yan-ping,Cui, Jin-li,Chan, Ting-shan,Dong, Jun-cai,Chen, Dong-liang,&Li, Xiang-dong.(2018).Role of chelant on cu distribution and speciation in lolium multiflorum by synchrotron techniques.Science of the total environment,621,772-781. |
| MLA | Zhao, Yan-ping,et al."Role of chelant on cu distribution and speciation in lolium multiflorum by synchrotron techniques".Science of the total environment 621(2018):772-781. |
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