| Summary: | 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.
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