The effect of a new protective-stimulating complex on the growth and development of spring wheat of the Ester variety under environmental stress

Abstract

In the research, the influence of protective-stimulating complexes on the growth and development of spring wheat plants of the Ester variety when grown in various water supply conditions was studied. The effect of protective-stimulating complexes of various compositions on the dynamics of biomass accumulation and assimilation surface of spring wheat plants under conditions of optimal water supply, drought and short-term waterlogging was studied. The negative effect of stressful conditions on wheat plants has been shown. A sharp change in the processes of accumulation of plant mass and photosynthetic surface of wheat plants was revealed. Under the conditions of exposure to waterlogging in the control variant, three stages of plant development can be noted: the accumulation of biomass before the onset of the stressor, positive dynamics during the stressor period and negative dynamics during the repair period. The use of protective and stimulating complexes of various compositions had a positive effect on the growth and development of wheat plants during the growing season. In the variants with the use of protective and stimulating complex (PSC) 1 and protective and stimulating complex 2, the following main stages can be noted: during the period of the stressor, there was a decrease in the area of the assimilation surface in the amount of about 20% of the initial state, however, during the repair period, the plants regained their original size and continued to grow, increasing the surface area by 50% and 70%, respectively. As a result, the increase in the area of the assimilation surface in plants of the variant with the use of protective and stimulating complex 1 was 40%, and in plants of the variant with the use of protective and stimulating complex 2 was 65%.