Role of antioxidant systems in wheat genotypes tolerance to water stress
1998
Sairam, R.K. | Deshmukh, P.S. | Saxena, D.C. (Indian Agricultural Research Inst., New Delhi (India). Div. of Plant Physiology)
The role of plant antioxidant systems in stress tolerance was studied in leaves of three contrasting wheat genotypes. Drought imposed at two different stages after anthesis resulted in an increase in H202 accumulation and lipid peroxidation and decrease in ascorbic acid content. Antioxidant enzymes significantly increased under water stress. Superoxide dismutase activity, however, did not show significant differences among the genotypes under irrigated as well as water stress condition. It seems that H2O2 scavenging systems as represented by ascorbate peroxidase and catalase are more important in imparting tolerance against drought induced oxidative stress than superoxide dismutase alone.
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