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Copper Uptake and Its Effect on Metal Distribution in Root Growth Zones of Commelina communis Revealed by SRXRF
Shi, JY; Yuan, XF; Chen, XC; Wu, B; Huang, YY; Chen, YX; Huang YY(黄宇营)
2011
发表期刊BIOLOGICAL TRACE ELEMENT RESEARCH
卷号141期号:1-3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.
文章类型Article
摘要To explore the copper uptake mechanisms by the Cu-tolerant plant Commelina communis, the contents of Cu and other metals (including Fe, Zn, and Mn) in roots were detected using atomic absorption spectrometer under transporter inhibitors, partial element deficiency, or Cu excess treatments, while distribution characters of Cu and other metals in root growth zones were investigated by synchrotron radiation X-ray fluorescence spectroscopy (SRXRF). Cu uptake was inhibited by the uncoupler DNP and P-type ATPase inhibitor Na(3)VO(4), not by the Ca(2+) ion channel inhibitor LaCl(3), suggesting that Cu could probably be assimilated actively by root and be related with P-type ATPase, but not through Ca(2+) ion channel. Fe or Zn deficiency could enhance Cu uptake, while 100 mu M Cu inhibited Fe, Zn, and Mn accumulation in roots significantly. Metal distribution under 100 mu M Cu treatment was investigated by SRXRF. High level of Cu was found in the root meristem, and higher Cu concentrations were observed in the vascular cylinder than those in the endodermis, further demonstrating the initiative Cu transport in the root of C. communis. Under excess Cu stress, most Fe was located in the epidermis, and Fe concentrations in the endodermis were higher than those in the vascular cylinder, suggesting Cu and Fe competition not only in the epidermal cells but also for the intercellular and intracellular transport in roots. Zn was present in the meristem and the vascular cylinder similar to Cu. Cu and Zn showed a similar pattern. Mn behaves as Zn does, but not like Fe.
关键词Commelina communis Copper uptake Distribution Root growth zones SRXRF
学科领域Biochemistry & Molecular Biology; Endocrinology & Metabolism
DOI10.1007/s12011-010-8710-5
收录类别SCI
WOS类目Biochemistry & Molecular Biology ; Endocrinology & Metabolism
WOS记录号WOS:000290727800031
引用统计
被引频次:13[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/311005/227472
专题多学科研究中心
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GB/T 7714
Shi, JY,Yuan, XF,Chen, XC,et al. Copper Uptake and Its Effect on Metal Distribution in Root Growth Zones of Commelina communis Revealed by SRXRF[J]. BIOLOGICAL TRACE ELEMENT RESEARCH,2011,141(1-3):#REF!.
APA Shi, JY.,Yuan, XF.,Chen, XC.,Wu, B.,Huang, YY.,...&黄宇营.(2011).Copper Uptake and Its Effect on Metal Distribution in Root Growth Zones of Commelina communis Revealed by SRXRF.BIOLOGICAL TRACE ELEMENT RESEARCH,141(1-3),#REF!.
MLA Shi, JY,et al."Copper Uptake and Its Effect on Metal Distribution in Root Growth Zones of Commelina communis Revealed by SRXRF".BIOLOGICAL TRACE ELEMENT RESEARCH 141.1-3(2011):#REF!.
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