Characterization of cadmium accumulation in willow as a woody metal accumulator using synchrotron radiation-based X-ray microanalyses

DOI
  • Harada Emiko
    Research Institute for Sustainable Humanosphere, Kyoto Univ.
  • Hokura Akiko
    Dep. of Appl. Chemistry, Tokyo Univ. of Science School of Engineering, Tokyo Denki Univ.
  • Takada Saori
    Dep. of Appl. Chemistry, Tokyo Univ. of Science
  • Baba Kei'ichi
    Research Institute for Sustainable Humanosphere, Kyoto Univ.
  • Terada Yasuko
    Japan Synchrotron Radiation Research Institute
  • Nakai Izumi
    Dep. of Appl. Chemistry, Tokyo Univ. of Science
  • Yazaki Kazufumi
    Research Institute for Sustainable Humanosphere, Kyoto Univ.

Bibliographic Information

Other Title
  • シンクロトロン放射光蛍光X線分析法によるヤナギの重金属蓄積機構の解明

Abstract

The metal-accumulating trees are important plants for restoring contaminated soil because of their high biomass; however, they have not been well characterized. We examine here the metal tolerance and the growth rate of willow plants, including Salix eriocarpa, S. gilgiana and S. integra, in the presence of Cd. The synchrotron radiation-based μ-X-ray fluorescence (XRF) analysis revealed the accumulation pattern of Cd at the tip of the serration in leaves, and the phellogen and/or the phelloderm under the stem surface in S. gilgiana. μ-X-ray absorption near edge structure (XANES) spectra of Cd in all the accumulation sites are close to that of Cd ion coordinated by O ligands. Although sulfur is generally considered to detoxify Cd in the herbaceous plants, the present results suggest that the chemical form of Cd was not Cd-S in all the accumulation sites. S. gilgiana is one of the candidates for phytoremediation to restore metal contaminated soils in Japan. The present work adds a novel facet to phytoremediation technology by revealing a Cd accumulation mechanism in the woody metal accumulator.

Journal

Details 詳細情報について

  • CRID
    1390001205631359488
  • NII Article ID
    130006992531
  • DOI
    10.14841/jspp.2010.0.0073.0
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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