Role of chelant on Cu distribution and speciation in Lolium multiflorum by synchrotron techniques

doi:10.1016/j.scitotenv.2017.11.189

	Role of chelant on Cu distribution and speciation in Lolium multiflorum by synchrotron techniques
	Chen DL(陈栋梁); Zhao, YP; Cui, JL; Chan, TS; Dong, JC; Chen, DL; Li, XD; Dong JC(董俊才)
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2018
卷号	621 页码:772-781
关键词	Copper EDDS Phytoextraction Micro XRF X-ray absorption spectroscopy
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2017.11.189
文献子类	Article
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.
电子版国际标准刊号	1879-1026
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
语种	英语
WOS记录号	WOS:000424196800078
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285682]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Chen DL,Zhao, YP,Cui, JL,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	陈栋梁.,Zhao, YP.,Cui, JL.,Chan, TS.,Dong, JC.,...&董俊才.(2018).Role of chelant on Cu distribution and speciation in Lolium multiflorum by synchrotron techniques.SCIENCE OF THE TOTAL ENVIRONMENT,621,772-781.
MLA	陈栋梁,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.