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An X-ray absorption spectroscopy investigation of speciation and biotransformation of copper in Elsholtzia splendens
Shi, JY; Wu, B; Yuan, XF; Cao, YY; Chen, XC; Chen, YX; Hu, TD; Hu TD(胡天斗)
2008
发表期刊PLANT AND SOIL
卷号302期号:1-2页码:#REF!
通讯作者Shi, JY (reprint author), Zhejiang Univ, Dept Environm Engn, Huajiachi Campus,268 Kaixuan Rd, Hangzhou 310029, Zhejiang, Peoples R China.
摘要Elsholtzia splendens is a Cu-tolerant plant growing in copper mine areas in the south of China. In this study, X-ray absorption spectroscopy (XAS) was used to investigate the Cu speciation and biotransformation in E. splendens with 300 mu M Cu treatment from 10 days to 60 days. The results showed that 300 mu M Cu was phytotoxic to E. spendens. The Cu K-edge X-ray absorption near edge structure (XANES) revealed that most copper in roots, stems and leaves exists as divalent Cu. Cu speciation changed depending on the treatment time, but there was no unidirectional trend in roots, stems, and leaves. The percentages of potential Cu ligands in all samples were estimated by fitting the XANES spectra with linear combinations. Most Cu in roots, stems and leaves was bound with cell wall and histidine (His)-like ligands, while a minor proportion of the Cu was bound to oxalate and glutathione-like ligands. The fitting results of Cu K-edge extended X-ray absorption fine structure (EAXFS) showed that nitrogen/oxygen (N/O) ligands were dominant in roots, stems and leaves of the plant, while S ligands were rare. All these results suggest that Cu bound by N/O ligands plays a key role in Cu detoxification of E. splendens, and a role for classical metal-detoxifying S ligands, such as metallothioneins and phytochelatins, in Cu detoxification of E. splendens is not supported in the present study. Due to the phytotoxicity of 300 mu M Cu to E. splendens, the question of whether S ligands play a significant role in Cu detoxification in E. splendens exposed to lower levels of Cu should be further studied.
文章类型Article
关键词Elsholtzia splendens copper cell wall ligands X-ray absorption spectroscopy
学科领域Agriculture; Plant Sciences
DOI10.1007/s11104-007-9463-6
收录类别SCI
WOS类目Agronomy ; Plant Sciences ; Soil Science
WOS记录号WOS:000251971500013
引用统计
被引频次:40[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226611
专题多学科研究中心
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GB/T 7714
Shi, JY,Wu, B,Yuan, XF,et al. An X-ray absorption spectroscopy investigation of speciation and biotransformation of copper in Elsholtzia splendens[J]. PLANT AND SOIL,2008,302(1-2):#REF!.
APA Shi, JY.,Wu, B.,Yuan, XF.,Cao, YY.,Chen, XC.,...&胡天斗.(2008).An X-ray absorption spectroscopy investigation of speciation and biotransformation of copper in Elsholtzia splendens.PLANT AND SOIL,302(1-2),#REF!.
MLA Shi, JY,et al."An X-ray absorption spectroscopy investigation of speciation and biotransformation of copper in Elsholtzia splendens".PLANT AND SOIL 302.1-2(2008):#REF!.
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