#ultravioletb

Abstract For the first time, the growth parameters and the amount of calose accumulated in the seedlings of winter soft wheat (Triticum aestivum L.) variety Renan were determined under irradiation with ultraviolet B in the dose range of 0.1–10 kJ/m2. The differences in growth parameters of control and UV-B-irradiated winter wheat plants were analyzed. The inhibitory effect of UV-B irradiation on the growth of experimental plants in comparison with control plants was noted, which is associated with the morphological and physiological features of the induced accumulation of callose in the cells of winter wheat seedlings. The growth performance of irradiated plants within 5 days was lower than that of the control plants, whose growth averaged 1.6 cm per day, and the lowest at a dose of 10 kJ/m2. The results of constitutive and induced accumulation of callose as a primary protective barrier in the immune response reactions, which leads to increased resistance of wheat plants of Renan variety to abiotic stress, were analyzed.