Аннотация
Wheat (Triticum aestivum L.) is grown in many countries around theworld, its productivity is hampered due to a variety of abiotic stresses suchas drought, salinity, and heat, particularly in arid and semiarid regions ofthe world. Of these, drought as complicated factor, is the major abioticstress that is regarded as highly deleterious to growth and productivity ofthe wheat. Drought inhibits a variety of physiological processes in plants.Drought continues to be an important challenge to agricultural researchersand plant breeders. Drought is a major abiotic factor limiting the crops yieldgrown more than one third of the arable land around the world. Polyaminesare endogenous plant growth promoters that affect a variety of physiological and metabolic functions, and they particularly involved in the floweringprocess. Studies conducted with other crop plants indicated that there isrelationship between changes in polyamine content and drought tolerance.However, no information exists regarding to polyamine content of wheatunder conditions of limited water supply. This study was aimed quantifyingthe effect of drought on different classes of polyamine such as putrescine,spermidine and spermine concentrationin the parent line Zhenis and M7mutant lines developed on its genetic basis using gamma radiation doses of 100and 200 Gy resulting changes in their concentrations. The article presentsscreening parent variety of spring wheat Zhenis and M7 mutant lines developed on its genetic basis using gamma radiation doses of 100 and 200 Gy onpolyamine content in plants grown under watered and drought condition.The wheat mutant germplasm, grown under irrigation had 4 samples, whichare characterized by significantly increase in polyamines concentration. Onthe genetic basis of varieties Zhenis gamma radiation dose of 100 Gy on thebasis of putrescine concentration have been identified two significant positive mutant linesunder drought conditions.Key words: drought, polyamines, putrescine, spermidine, spermine,wheat, mutant lines.