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Production of organic acids and adsorption of Cd on roots of durum wheat (Triticum turgidum L. var. durum)

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Abstract

A number of isolines of durum wheat (Triticum turgidum var. durum) differ in their translocation of Cd. In the field, the high isolines accumulate twice the Cd in leaves and grain when compared to the low isolines. The hypothesis that differential accumulation of Cd is associated with differential production of organic acids was tested by measuring Cd content in tissues, Cd partitioning within the root, and organic acids in tissues. In solution culture, the high and low isolines of W9261-BG did not differ in any of the variables measured. Within W9260-BC, the low isoline had half the Cd in its shoot, 30% more tightly bound Cd in the root and higher concentrations of fumaric, malic, and succinic acids in the root compared to the high isoline. Differential Cd accumulation may be linked to differential adsorption and retention of Cd in the roots of the low Cd-accumulating isolines, possibly via chelation with organic acids.

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Acknowledgments

The authors gratefully acknowledge the Natural Sciences and Engineering Research Council Discovery Grant Program for financial support. We also thank Dr. John M. Clarke for providing seeds, Dr. Charles Wu for ICP-AES analyses, and Dr. George Lazarovits and Mr. Igor Lalin for assistance with ion chromatography.

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Authors and Affiliations

  1. Department of Biology, University of Western Ontario, 1151 Richmond St. N., London, ON, N6A 5B7, Canada

    Bolaji A. Adeniji, Mackenzie T. Budimir-Hussey & Sheila M. Macfie

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  1. Bolaji A. Adeniji
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  2. Mackenzie T. Budimir-Hussey
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  3. Sheila M. Macfie
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Correspondence to Sheila M. Macfie.

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Communicated by A. Aniol.

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Adeniji, B.A., Budimir-Hussey, M.T. & Macfie, S.M. Production of organic acids and adsorption of Cd on roots of durum wheat (Triticum turgidum L. var. durum). Acta Physiol Plant 32, 1063–1072 (2010). https://doi.org/10.1007/s11738-010-0498-6

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  • DOI: https://doi.org/10.1007/s11738-010-0498-6

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