Abstract
The aim of the study was to study the effect of bacteria that stimulate plant growth and humic substances on the content of chlorophyll, nitrogen balance index, cytokinin concentration, abscisic acid in wheat plants grown in drought conditions. The accumulation of the raw mass of wheat plants during treatment with a strain of Pseudomonas plecoglossicida 2,4-D bacteria and humic substances with a deficiency of soil moisture is shown. Stimulation of plant growth is associated with the activation of root growth, which led to an increase in the nitrogen balance index and chlorophyll concentration in the treated plants. The detected increase in the concentration of chlorophyll in plants treated with P. plecoglossicida 2,4-D correlated with a decrease in the content of abscisic acid in shoots, and in plants treated with humates – with an increase in cytokinins in shoots. A higher efficiency of plant treatment with a combination of bacteria and humic substances than any of them individually may be associated with the additive effect of these treatments on hormonal balance.
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