DEPENDENCE OF PEROXIDASE (PO) AND POLYPHENOL OXIDASE (PPO) ENZYMES ACTIVITY ON PLANT PRODUCTIVITY UNDER THE INFLUENCE OF PHYTOPATHOGEN MICROMYCETES IN SOYBEAN PLANT (GLYCINE MAX (L.) MERR.)

Fusarium and Alternaria are fungal diseases that cause significant damage to the productivity of soybean plant in Uzbekistan and in other soybean-growing countries. This article presents the results of the study of activity of perioxidase (PO) and polyphenol oxidase (PPO) enzymes in soybean and their dependence on plant productivity under the influence of Fusarium and Alternaria. According to the analysis of the results of experiments, under the influence of F. solani phytopathogen micromycetes on soybean varieties, a positive relation was observed between the plant productivity and the activity of Perioxidase (PO) and Polyphenol oxidase (PPO) enzymes in plant leaf, while the activity of enzyme Perioxidase (PO) itself was noted to be positive for F. gibbosum, and negative for A. altemata. The activity of enzymes Peroxidase (PO) and Polyphenoloxidase (PPO) in plant roots under the influence of phytopathogenic micromycetes in soybean varieties was found to be negative for plant productivity in A. altemata. In conclusion, we can say that when the soybean varieties Tumaris and Orzu were infected with F. solani and the Orzu variety with A. Altemata, the plant productivity was stable compared to the soybean varieties Genetic-1, Sellekta-201 and Sellekta-302, which depended on the activity of Peroxidase (PO) and Polyphenol oxidase (PPO) enzymes.