The effect of A. brasilense Sp245 and indoleacetic acid (IAA) on microplants of 10 potato cultivars in in vitro culture was studied. Significant genotypic differences in the growth-stimulating effect of bacteria and IAA on plants were established.
The article presents the results of a comparison of the effect of rhizospheric growth-stimulating bacteria of the Azospirillum baldaniorum Sp245 strain and exogenous indolyl-3-acetic acid on the growth of microclones of potato varieties Nevsky, Condor, Red Scarlett, Rosara, Avrora, Zhukovsky early, Ilyinsky, Vasilek, Fioletovy, Darenka at micropropagation in in vitro culture. The A. baldaniorum Sp245 strain is capable of synthesizing indolyl-3-acetic acid upon plant inoculation. Exogenous indolyl-3-acetic acid was introduced into the nutrient medium in three concentrations. The physiological and morphological parameters of the shoots and roots of potato plants were assessed on the 20th day of cultivation. A significant influence of the plant genotype and cultivation conditions was established. According to the nature of reactions to exogenous indolyl-3-acetic acid, all varieties are divided into three groups. The maximum effect of inoculation with bacteria was noted for varieties of the first group: Avrora, Ilyinsky, Red Scarlett.
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