УДК: 612.014.484:012.015.1]-078.73-037-092.9

Abstract: Fusarium fungi are widespread in nature and cause various plant diseases. The phytohormone 
salicylic acid can increase plants' resistance to stress factors of various natures. Despite the large number 
of scientific publications devoted to the study of the functions of salicylic acid in plant organisms, data 
on the effect of salicylate on plants under conditions of biotic stress are few and contradictory. The aim 
of the work was to study the dynamics of the activity of individual enzymes of the antioxidant system 
in the roots and shoots of Zea mays L. and Triticum aestivum L. under the influence of salicylic acid 
during infection with the phytopathogen Fusarium graminearum. Physiological-biochemical, statistical 
research methods are applied. The effect of salicylic acid (SA) at a concentration of 0,5 mМ on the 
dynamics of the activity of catalase and superoxide dismutase (SOD) in the roots and shoots of maize 
аnd wheat with lesions Fusarium graminearum in the early stages ontogenesis. It was found that under 
the action of SA, the defeat of phytopathogen increases the activity of SOD in the tissues of seedlings 
of corn and wheat and the activity of catalase in seedlings of corn. 
Keywords: Zea mays L.; Triticum aestivum L.; salicylic acid; catalase; superoxide dismutase; 
Fusarium graminearumi.