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Molecular Responses to Cadmium in Roots of Pisum Sativum L. |
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| Authors: | Facundo Rivera-Becerril Ashraf Metwally Fabrice Martin-Laurent Diederik Van Tuinen Karl-Josef Dietz Silvio Gianinazzi Vivienne Gianinazzi-Pearson |
| Institution: | 1. UMR 1088 INRA/5184 CNRS/U. Bourgogne Plante-Microbe-Environnement, INRA-CMSE, BP 86510, 21065, Dijon Cédex, France 2. Depto. El Hombre y su Ambiente, CBS, Universidad Autónoma Metropolitana-Xochimilco, Calz. del Hueso 1100, Col. Villa Quietud, 04960, México, DF, México 3. Botany Department, Faculty of Science, Assiut University, 71516, Assiut, Egypt 4. UMR A111 INRA/U. Bourgogne, Microbiologie et Géochimie des Sols, BP 86510, 21065, Dijon Cédex, France 5. Department of Physiology and Biochemistry of Plants, University of Bielefeld, Universit?tsstraβ e 25, 33501, Bielefeld, Germany |
| Abstract: | Molecular responses to Cd were studied in roots of three pea genotypes (cv. Frisson, VIR4788, VIR7128) growing in a polluted substrate. Root and shoot fresh biomass was decreased by Cd pollution in all genotypes. Gene expression profiling after one weeks' exposure to Cd revealed that genes encoding stress-related proteins (heat-shock protein, pI206, chitinase, chalcone isomerase), a metallothionein, γ -glutamylcysteine synthetase and glutathione reductase were up-regulated in the pea genotypes. A glutathione synthetase gene was activated only in VIR4788 but a homoglutathione synthetase gene was unaffected by Cd, and concomitantly glutathione/homoglutathione accumulation in plant roots did not change with Cd stress. However, the overall concentration of thiol groups, which indicate the presence of phytochelatins and/or homophytochelatins, increased more than 2-fold. |
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