THE STUDY OF THE PIRABACTIN EFFECT ON THE YIELD OF PISUM SATIVUM L. AND ANALYSIS OF CHANGES IN LIPID PEROXIDATION AND ELECTROLYTES LEAKAGE AS POSSIBLE FACTORS OF THIS EFFECT

• Main Authors: A. V. Yakunina, Yu. V. Sinitsyna, E. K. Krutova, A. P. Veselov
• Format: Article
• Language: English
• Published: Penza State University Publishing House 2020-12-01
• Series: Известия высших учебных заведений. Поволжский регион: Естественные науки
• Subjects: pirabactin; yield; lipid peroxidation; electrolytes leakage; resistance

Background. In the last decade, an increasingly advanced direction has become the development of drugs – synthetic growth regulators, which are environmentally safe drugs of stability increasing and productivity of agricultural plants. The purpose of the research is to study the effect of the artificial phytohormone pirabactin on the yield of peas grown in the field, as well as on the indicators of lipid peroxidation (LPO) and the electrolytes leakage in plant cells. Materials and methods. Pea plants were grown in the field, one group of plants was treated with phytohormone at the seed stage, the other – at the crop stage. For the seed treatment pyrabactin was used at a concentration of 0,3 μmol/l, for crop treatment – at a concentration of 1 μmol/l. Control plants were treated with an appropriate amount of water. The biological yield, content of diene conjugates, Schiff bases, the electrolytes leakage were measured, and the membrane stability index was calculated. Results. Seed treatment with pirabactin increased the biological yield of pea plants by 33 %, crop treatment – by 17 %. Pirabactin, with any type of treatment, did not affect the electrolytes leakage and the content of LPO products. Conclusions. Pirabactin increased the biological yield of peas both in seed treatment and in crop treatment. However, pirabactin did not affect on the electrolytes leakage and the content of LPO products. Thus, pyrabactin can be used to increase the yield of pea plants, but the mechanism of its stimulating action, apparently, is not associated with cell membranes.