Application of Pyrimidine Derivatives as New Regulators to Enhance Wheat Growth in The Vegetative Phase

The regulatory effect of synthetic low-molecular-weight azaheterocyclic compounds, pyrimidine derivatives on the growth and photosynthesis of winter wheat (Triticum aestivum L.) variety Taira in the vegetative phase was studied. Wheat growth parameters such as average shoot length (mm) and average root length (mm) and wheat photosynthesis parameters such as chlorophyll and carotenoid content (mg/g fresh weight) under the regulatory effect of pyrimidine derivatives were measured 4 weeks after seed germination and compared with those of control wheat grown in distilled water or wheat grown under the regulatory effect of auxin IAA. The study showed that the wheat growth parameters and photosynthetic parameters under the regulatory effect of synthetic compounds, pyrimidine derivatives at a concentration of 10-6M were similar to or higher than the parameters of wheat under the regulatory effect of auxin IAA at a similar concentration of 10-6M, and also exceeded that of the control wheat grown in distilled water. The selectivity of the regulatory effect of synthetic compounds, pyrimidine derivatives on wheat growth and photosynthesis depended on the substituents in their chemical structure. The most physiologically active synthetic compounds, pyrimidine derivatives have been proposed for use to enhance the growth and photosynthesis of wheat in the vegetative phase.