Blaginina A. Ecological features of interaction of winter wheat plants with phytopathogenic fungi

This manuscript is devoted to studying of interaction between phytopathogenic fungus and different winter wheat varieties, as well as influence of different varieties of wheat on producing infection structures by phytopathogen. The method of estimating the effect of winter wheat's varieties on intensity of fungus sporulation during different stages of plant ontogenesis is developed. The influence of different wheat's varieties upon sporulation rate of pathogens F. oxysporum, S. tritici, A. tenuissima on the different parts of plant during vegetative period of the winter wheat is substantiated. It is shown that the content of ascorbic acid and glutathione in plants is linked directly with the sporulation of pathogenic fungi. The data concerning the evaluation of aggressiveness of various strains of F. oxysporum, which were isolated from different wheat varieties, were shown. Based on indicators of growth rate and sporulation intensity it was found that the isolates of F. oxysporum are heterogenous. The influence of metabolites of different wheat's varieties upon growth rate of mycelium and the intensity of sporulation phytopathogenic fungi F. oxysporum and A. tenuissima is substantiated. It was found that plant metabolites from different varieties of winter wheat stimulatе physiological activity of the fungi. The differentiation of influence of winter wheat varieties on production the infection structures of fungus F. oxysporum and A. tenuissima is proved. It was proved also that plant metabolites and endophytic bacteria are mechanisms of influence on production of the infection structures of micromycetes.