The activation of wheat resistance against powdery mildew by combination of biotic elicitor and NO donor

Aim. The aim of research was to analyze the activation of Triticum aestivum L. non-specific resistance by the effect of ferulic acid and NO on H2O2 content against fungal pathogen from environment in field trials. Methods. Content of endogenous H2O2 was measured in elicitor treated and infected wheat plants (cv. Oberig myronivskij and Svitanok myronivskij) during different ontogenesis phases. The extent of disease development, morphometric parameters and yield structure were analyzed. Results. The data obtained suggest that different levels of endogenous hydrogen peroxide were induced in wheat leaves by treatment. The growth and yield were stimulated. The infection damage decreased. Conclusions. The role of endogenous hydrogen peroxide is crucial for wheat defense during all vegetation period. The elicitor and donor NO induced effective defense responses and resistance in winter wheat against Erysiphe graminis. Keywords: Triticum aestivum L., ferulic acid, NO, induced resistance, powdery mildew.