ВЛИЯНИЕ НАНОСЕЛЕНА НА СОДЕРЖАНИЕ ИОНОВ K+, Na+ И Cl- В ПРОРОСТКАХ ПШЕНИЦЫ В УСЛОВИЯХ КОМБИНИРОВАННОГО ДЕЙСТВИЯ ЗАСОЛЕНИЯ И ЗАСУХИ

Abstract

Soil salinization is one of the most important problems for agriculture. In most cases, the effect of salinization is manifested in conjunction with water deficiency, reinforcing each other. One of the most dangerous types of salinization is sodium chloride, in which both sodium and chlorine ions have a damaging effect on plants. The physiological processes taking place under stressful conditions with the participation of enzymes and antioxidants are closely related to each other. The content of some enzymes is significantly affected by selenium. The least toxic and bioavailable is selenium in the form of nanoparticles stabilized by natural biologically active substances. The aim of the work was to study the effect of the tread action of the original water-soluble composition of nanosalen stabilized with sodium alginate on the content of K+, Na+ and Cl— ions in wheat seedlings under the combined effects of salinization and drought. The objects of study were winter wheat seeds (Triticum aestivum L.) and a water-soluble composition of selenium nanoparticles. Wheat seeds were soaked for 4 hours in a solution of selenium nanocomposition at a concentration of 10.0; 20.0 and 30.0 mg/l. The control was seeds soaked in distilled water. Plants were grown for 10 days under controlled conditions in a climatic chamber in vessels with a capacity of 1.0 L., a 16-hour photoperiod, a temperature of 25/20 °C (day / night) and a relative humidity of 60±5 %. Well washed river sand was used as a substrate. On day 10, the mass of raw and dry matter and the content of K+, Na+ and Cl— ions in the leaves and roots, as well as on the water content of the leaf tissues and the relative water content (RWC) were determined. For the first time, a study was made of the protective effect of selenium nanocomposite on the content of K+, Na+ and Cl— in leaves and roots, as well as their relationship with the water status of leaves in wheat seedlings under the combined effect of chloride salinity and drought. The action of nanoselen increases the absorption of K+ ions by both roots and leaves. In this case, the absorption of Na+ ions are significantly reduced. The protective effect of nanoselen is also manifested in maintaining a high-water status.