Assessment of morphophysiological parameters of resistance of various varieties of winter rye to chloride salinity in laboratory conditions

Determining the tolerance of cultivated plants to salts is considered important and necessary in breeding practice in areas with primary and secondary soil salinization. This article examines the effect of salinity (NaCl) in laboratory conditions on the growth and development of plants of three varieties of winter rye (Chusovaya, Yantarnaya, Alisa) and the effectiveness of early diagnosis on resistance to the stress factor. The purpose of the study was to determine the resistance of winter rye varieties to chloride salinity based on the variability of morphophysiological characteristics under simulated conditions. Based on the identified differences in indicators characterizing the growth processes of plants in vegetation vessels in the control and on the substrate with NaCl, the varieties according to resistance to salt stress are distributed in the following order: Chusovaya, Yantarnaya, Alisa. The data obtained indicate the specificity of the response of varieties to a stress factor. It is shown that for a more objective characterization of genotypes for salt tolerance, a comprehensive study of traits (seed germination, morphometric parameters of shoots and roots, chlorophyll content in leaves, plant biomass) is necessary. The results of the study can be used in the selection of initial forms for the selection of winter rye, as well as in the cultivation of the studied varieties in different agro-ecological conditions.