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This study is aimed at the responses of grapevine adventitious root explants to zinc (Zn2+) excess. Within 24 h Zn2+ induced oxidative burst in concentration-dependent manner. The time course analysis revealed biphasic response in superoxide (O2-.) production. Hydrogen peroxide (H2O2) accumulation rose gradually within 24 h. Enhanced Zn2+ concentrations did not induce progression of cell death. Immediately...
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