Internodes and flag leaf growth and wheat plants yield under drought

Aim. The aim of the work was to study the growth of top internodes and flag leaf and the yield of bread winter wheat (Triticum aestivum L.) under drought. Methods. Wheat plants cultivars Schedrivka Kyiv’ka and Kyivska 19 were grown under optimal conditions until the earing-flowering phase, after that the experimental plants were transferred to drought regime for 8 days. Optimal water supply was restored to the end of vegetation. Length and mass of top internodes, area and mass flag leaf were measured during the experiment. Yield structure were analyzed of the ripened plants. Results. It was established that the water deficit in the soil during the phase of earing-flowering delayed the growth of length and weight top internodes and flag leaf, decreased the plant grain productivity in cultivar Kyivska 19, weight of 1000 grains in both cultivars of plants. Conclusions. The drought regime in earing-flowering phase of winter wheat plants delayed the growth of top internodes and flag leaf, decreased the grain yield, weight of 1000 grains.