Mehdi Saeediyan, Mohammad Nasri, Pourang Kasraie
Department of Agronomy, Varamin- Pishva Branch, Islamic Azad University, Varamin, Iran
Key words: Wheat, cultivar, cadmium, destruction biomarkers and Antioxidant Enzyme Activities.
Wheat is the world’s most important cereal crop in terms of both area cultivated and amount of grain produced. Pot experiments were conducted to evaluation of xidative stress in cadmium tolerance in wheat cultivars. This experiment was conducted in Varamin zone at Iran during 2012. In this respect, Research was conducted with complete randomized block experimental design with factorial arrangement with four replications. In this experiment, Cadmium tolerance levels 1- Control (A1), 2- 50 mg/lit Cadmium (A2), 3- 100 mg/lit Cadmium, (A3), 4- 150 mg/lit Cadmium(A4). And Wheat cultivar on four levels: 1- Pishtaz (B1),2- Dena(B2),3- Ariya (B3) and 4- Parsi(B4).Results of the study showed that Cadmium tolerance decreased the activities of catalase (CAT), superoxide dismutase (SOD) and glutathione peroxidase (GPX) in wheat cultivars. There were significant differences among genotypes for antioxidant enzyme activity. Also, Cadmium tolerance × cultivar interactions showed significant difference on GPX activities. Results of the study also indicated that Cadmium tolerance causes production of reactive oxygen species(ROSs),which results in greater membrane permeability, i.e. malondialdehyde (MDA) content and oxidative stress in the plants. Moreover, genotypes having greater levels of antioxidants showed better resistance to Cadmium tolerance.
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