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Registration Number

0222U000092, 0121U112018 , R & D reports

Title

Physiological and biochemical peculiarities of formation and functioning of symbiotic systems Glycine max-Bradyrhizobium japonicum when using fungicides

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Head

Pavlyshche Anastasiya V., Кандидат біологічних наук

Registration Date

02-01-2022

Organization

Institute of Plant Physiology and Genetics of the National Academy of Sciences of Ukraine

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As a result of research it was found that pre-sowing treatment of soybean seeds with fungicides depending on the active substance of the applied pesticide with varying degrees inhibits the formation and functioning of the symbiotic apparatus to the budding stage, shifting the peak of nitrogen-fixing activity to later stages of ontogenesis. It has been shown that fungicides have a negative effect on the intensity of photosynthesis and transpiration of soybeans against the background of inoculation with nodule bacteria, and the correlation between the intensity of photosynthesis of the whole plant and nitrogen fixation activity gradually increases during the growing season. At the same time, the relationship between nitrogen-fixing activity and dry matter accumulation weakens. It was investigated that the action of Standak Top and Fever creates an imbalance in the synthesis of photosynthetic pigments chlorophyll, carotenoids and their ratio to the stage of mass flowering with subsequent alignment of values to the level of control plants, which can be considered as a component of adaptation to fungicides action. The use of fungicides Standak Top and Fever for soybean seed treatment promotes full plant development during the growing season and crop formation, which indicates the feasibility of using our fungicides for pre-sowing treatment of soybean seeds with subsequent bacterization by rhizobia. To reduce the toxic effects of fungicides on legumes ‒ rhizobial symbiosis, it is recommended to carry out early treatment of seeds (14 days before sowing) of soybeans and during the growing season.

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Pavlyshche Anastasiya V.
Pukhtayevych Petro P
Homenko Yulia O.