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

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 p...

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Bibliographic Details
Published in:	Acta physiologiae plantarum Vol. 32; no. 6; pp. 1063 - 1072
Main Authors:	Adeniji, Bolaji A, Budimir-Hussey, Mackenzie T, Macfie, Sheila M
Format:	Journal Article
Language:	English
Published:	Berlin/Heidelberg Berlin/Heidelberg : Springer-Verlag 2010 Springer-Verlag
Subjects:	Agriculture Biomedical and Life Sciences Life Sciences Original Paper Plant Anatomy/Development Plant Biochemistry Plant Genetics and Genomics Plant Pathology Plant Physiology Cadmium Adsorption Isolines LMWOAs
Online Access:	Get full text
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Summary:	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.
Bibliography:	http://dx.doi.org/10.1007/s11738-010-0498-6
ISSN:	0137-5881 1861-1664
DOI:	10.1007/s11738-010-0498-6