Activation of antioxidant enzymes and content of hydrogen peroxide in winter wheat leaves by deficit of soil nitrogen

摘要

We proved that the insufficient supply of soil nitrogen, induces defense reactions in winter wheat, as evidenced by the increase in hydrogen peroxide and the activity of antioxidant enzymes in leaves. Treatment of plants with carbamide on a low nitrogen background, induced a decrease in the content of hydrogen peroxide in leaves of varieties of winter wheat, which may indicate a low level of oxidative processes in plants due to the inclusion of antioxidant enzymes in stress conditions. At the same time, the intensification of the activity of antioxidant enzymes in leaves of varieties of winter wheat for the low nitrogen nutrition of plants was recorded. Foliar dressing of winter wheat urea is regarded as a kind of stress on the plant, on the one hand, and on the other, as a factor that stimulates of inclusion the protective mechanisms, in the above privacy and activation of work in enzymes of ascorbate-glutathione cycle and superoxide dismutase. This contributes to a better realization of the genetic potential of winter wheat varieties.