Journal Article

Characterization of Cadmium Accumulation in Willow as a Woody Metal Accumulator Using Synchrotron Radiation-Based X-Ray Microanalyses

Emiko Harada, Akiko Hokura, Saori Takada, Kei’ichi Baba, Yasuko Terada, Izumi Nakai and Kazufumi Yazaki

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 51, issue 5, pages 848-853
Published in print May 2010 | ISSN: 0032-0781
Published online April 2010 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcq039
Characterization of Cadmium Accumulation in Willow as a Woody Metal Accumulator Using Synchrotron Radiation-Based X-Ray Microanalyses

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Trees that accumulate metals are important plants for restoring contaminated soil because of their high biomass. We examined the cadmium (Cd) tolerance and growth rate of six willow (Salix) species common in Japan. To characterize in detail the localization of Cd and its ligands, synchrotron radiation-based micro X-ray fluorescence analysis was used. This revealed the accumulation of cadmium at the tips of the serrations in leaves, and the phellogen and/or the phelloderm under the stem surface. µ-X-ray absorption near edge structure spectra of Cd in all the accumulation sites were similar to that of the Cd ion coordinated by O ligands in S. gilgiana.

Keywords: Cadmium; Phytoremediation; Salix; Serration; Synchrotron radiation-based X-ray analysis; Woody plant

Journal Article.  2647 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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