INFLUENCE OF BACTERIAL STRAINS OF THE GENUS BACILLUS ON GROWTH PROCESSES AND TISSUE FORMATION IN THE SHOOTS OF REMONTANT RASPBERRIES

The studies were carried out with the aim of revealing histological reactions in the shoots of remontant raspberries as an aspect of the growth-stimulating effect of pre-planting treatment of the root system of seedlings with strains of saprotrophic bacteria of the genus Bacillus. The observations in the model experiment were carried out in 2017-2018 in the production plantings of remontant raspberries of the agricultural artel “Sady Sibiri” in the Novosibirsk Region. Plants were treated before planting by soaking the root system in a working fluid containing a bioagent at a concentration of 1×105 CFU / ml. In terms of the totality of growth-stimulating effects, the most effective complex effect on remontant raspberry plants was provided by pre-planting treatment with B subtilis strain VKPM B-10641 and a mixture preparation Fitop 8.67. The number of replacement shoots increased by 45–69%, the length of replacement shoots - by 16–20%, the amount internodes - 1.2 times relative to control. Under the influence of the same bacterial bioagents in the shoots of remontant raspberries, an increase in the thickness of the peridermis by 20–25% relative to the control, an increase in the number of peridermal layers by 12–35%, suberinized (matured) layers of the peridermis by 30–48%, and the thickness of xylem by 12 –22% was observed. B subtilis VKPM B-10641 strain and Fitop 8.67 influence raspberry plants, the regularity of simultaneous stimulation of growth processes in the replacement shoots and the formation of mature peridermis. So it acts as an immunological barrier against phytopathogens, pests and abiotic stress factors. So the research proved it.

remontant raspberry, bacterial strains of the genus Bacillus, growth processes, periderm, xylem

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