PHYSIOLOGICAL RESPONSE OF SOME WHEAT CULTIVARS TO THERMAL STRESS

Plants are exposed during their development to the influence of various stressful factors, both abiotic and biotic in natural conditions habitation. Thermal stress is likely most important factor that adversely affects plant growth development. Wheat (Triticum aestivum L.) one economically crops worldwide. In this study, three Latvian winter wheat cultivars ´Creator´, ´Galerist´, ´Skagen´ were used as a research model subjected short-term high temperature (42°C, 1 h) analyzed for following parameters (maximum length root, first leaf coleoptile well seedlings weight). general, caused an insignificant reduction almost all criteria like growth, weight, maximal root ´Galerist´ at 6th day Furthermore, characteristics stimulated by cultivar ´Creator´. A slowing processes under thermal revealed varietal specificity on impact stressor morphological structure cereal, which makes it possible diagnose tolerance cultivars.