Hydrogen Peroxide Induces Oxidative Stress in Detached Leaves of Oryza Sativa L
نویسندگان
چکیده
Induction of oxidative stress and possible involvement of antioxidants in rice (Oryza sativa L) leaves after in vivo treatment with hydrogen peroxide (H 2 O 2) was investigated. Degradation of chlorophyll, carotenoid and protein contents in rice leaves was observed which showed a recovery under free radical scavenger treatments. An increase in both total peroxide accumulation and lipid peroxidation was observed with increasing H 2 O 2 concentrations whereas lipid peroxidation decreased under free radical scavenger treatments. A gradual decrease in SOD and GPx activity as well as an increase in CAT and GR activities were recorded under H 2 O 2 treatments. In addition, proline accumulation accompanied by a decrease in ascorbate and glutahione content was observed in senescing rice leaves under H 2 O 2 treatments.
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