Ultrastructural alterations and HSP 70 induction in Elodea ca- nadensis Michx. exposed to heavy metals
نویسندگان
چکیده
The effects of the heavy metals lead (Pb) and cadmium (Cd) on the ultrastructure and the induction of Heat Shock Protein 70 (HSP 70) have been studied in Elodea canadensis Michx. As for the ultrastructural effects, sublethal concentrations of the metals caused alterations of the cell fine ultrastructure. Lead and cadmium induced alterations: chloroplast were swollen with altered thylakoid organization, many cytoplasmic vesicles appeared, cell wall organization changed. As for HSP, cadmium stress caused the most severe damages, inducing (and/or enhancing) proteins reacting vs HSP70 antibodies, suggesting that these molecular chaperones might be involved in the resistance to toxic effects of cadmium and lead in E. canadensis. Therefore, the induction of HSP 70 in E. canadensis would confer a higher resistance to pollutants under stressful conditions, lethal for other mosses and higher plant species.
منابع مشابه
Effect of Sublethal and Lethal Temperatures on Plant Cells '
A bstract. Soybean, Glycine max L., and elodea, Elodea canadensis Michx, leaves were exposed to sublethal and lethal temperatures and examined by light microscopy. Loss of ohlorophyll and swollen chloroplasts were observed in cells of elodea leaves exposed to sublethal temperatures. At the thermal death point of leaf cells of elodea and soybean, there was a disorganization of the tonoplast memb...
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