It was found that insufficient supply of winter wheat by soil nitrogen caused defense reactions in plants, as evidenced by the increase of hydrogen peroxide content and the activity of antioxidant enzymes in leaves. Foliar dressing of winter wheat with urea is regarded as a kind of stress for the plant, on the one hand, and on the other, as a factor that stimulates protective mechanisms and activation of antioxidant enzymes. This contributes to a better realization of the genetic potential of winter wheat varieties with high protein content.
Keywords: Triticum aestivum L., superoxide dismutase, glutathione reductase, ascorbate peroxidase, guaiacol peroxidase, hydrogen peroxide, urea, nitrogen
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