Production of organic acids and adsorption of Cd on roots of durum wheat (<Emphasis Type="Italic">Triticum turgidum</Emphasis> L. var. <Emphasis Type="Italic">durum</Emphasis>) |
| |
Authors: | Bolaji A Adeniji Mackenzie T Budimir-Hussey Sheila M Macfie |
| |
Institution: | (1) Department of Biology, University of Western Ontario, 1151 Richmond St. N., London, ON, N6A 5B7, Canada; |
| |
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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|