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Stem and leaf sequestration of zinc at the cellular level in the hyperaccumulator Sedum alfredii
Tian, SK; Lu, LL; Yang, XE; Labavitch, JM; Huang, YY; Brown, P; Huang YY(黄宇营)
2009
发表期刊NEW PHYTOLOGIST
卷号182期号:1页码:#REF!
通讯作者Yang, XE (reprint author), Zhejiang Univ, MOE Key Lab Polluted Environm Remediat & Ecol Hlt, Huajiachi Campus, Hangzhou 310029, Zhejiang, Peoples R China.
文章类型Article
摘要Sedum alfredii is a fast-growing, high-biomass zinc (Zn) hyperaccumulator native to China. Here, the characteristics of in vivo Zn distribution in stems and leaves of the hyperaccumulating (HE) and nonhyperaccumulating ecotypes (NHE) of S. alfredii were investigated by synchrotron radiation X-ray fluorescence (SRXRF) analysis, together with a Zn probe. Preferential Zn accumulation in leaf and stem epidermis was observed in both ecotypes, but to a much greater extent for HE. Epidermal Zn increased largely in leaves and stems of HE as exposure time was prolonged, while Zn saturation occurred relatively early in HE leaf mesophyll cells and stem vascular bundles. A second peak of Zn enrichment in stem and leaf vascular systems was shown in both ecotypes. However, the proportion of Zn accumulated in stem vascular bundles relative to other tissues was much greater for HE than for NHE. Leaf and stem distribution patterns of phosphorus (P) and sulphur (S) in the HE were very like that for Zn, while the calcium (Ca) distribution pattern was the reverse of that for Zn. No such relationship was observed in NHE. Our study mainly suggested that epidermal layers serve as important storage sites for accumulated Zn in the S. alfredii HE. New Phytologist (2009) 182: 116-126doi: 10.1111/j.1469-8137.2008.02740.x.
关键词cellular distribution hyperaccumulation Sedum alfredii synchrotron radiation X-ray fluorescence (SRXRF) zinc Zinpyr-1
学科领域Plant Sciences
DOI10.1111/j.1469-8137.2008.02740.x
收录类别SCI
WOS类目Plant Sciences
WOS记录号WOS:000263910700013
引用统计
被引频次:47[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/311005/226260
专题多学科研究中心
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GB/T 7714
Tian, SK,Lu, LL,Yang, XE,et al. Stem and leaf sequestration of zinc at the cellular level in the hyperaccumulator Sedum alfredii[J]. NEW PHYTOLOGIST,2009,182(1):#REF!.
APA Tian, SK.,Lu, LL.,Yang, XE.,Labavitch, JM.,Huang, YY.,...&黄宇营.(2009).Stem and leaf sequestration of zinc at the cellular level in the hyperaccumulator Sedum alfredii.NEW PHYTOLOGIST,182(1),#REF!.
MLA Tian, SK,et al."Stem and leaf sequestration of zinc at the cellular level in the hyperaccumulator Sedum alfredii".NEW PHYTOLOGIST 182.1(2009):#REF!.
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