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The growth-stimulating properties of synthetic pyrimidine derivatives on sugar sorghum (Sorghum saccharatum L.) variety Zubr grown for 2 weeks in laboratory conditions were studied. The morphometric indicators of sorghum plants treated with an aqueous 10-6 M solution of pyrimidine derivatives were compared with the indicators of sorghum plants treated with an aqueous 10-6 M solution of synthetic plant growth regulators Ivin, Methyur, Kamethur and phytohormone auxin IAA. Control sorghum plants were treated with distilled water. Conducted studies have shown that synthetic pyrimidine derivatives exhibit stimulating properties on the growth and development of shoots and roots of sorghum plants similar to auxin IAA, or Ivin, Methyur and Kamethur. Under the influence of synthetic pyrimidine derivatives, the morphometric indicators of sorghum plants increased significantly: the average length of shoots (mm), the average length of roots (mm), the average biomass (g) of 10 plants, compared to similar indicators of control sorghum plants. The relationship between the chemical structure and growth-stimulating properties of synthetic pyrimidine derivatives was analyzed. The use of the most biologically active synthetic compounds to stimulate the growth of sugar sorghum (Sorghum saccharatum L.) variety Zubr during the growing season is proposed
Tsygankova et al. (Wed,) studied this question.