Influence of salinity (NaCl) on the photosynthetic pigments content of some sweet sorghum varieties

Identification and introduction of crops into the production that are sufficiently adapted to drought and salinization of soils capable of providing high productivity with limited water consumption is becoming increasingly important currently, and in particular in prospect under the circumstances of aggravating of climate aridization and desertification processes in the Central Asian region. These requirements are met by sorghum, the main economic features of which are universality of use, exceptional heat,- drought,- and salt tolerance, as well as high productivity. The article presents the results of studying the effect of a saline nutrient medium on the content of photosynthetic pigments in some varieties of sweet sorghum to identify the most resistant varieties to chloride salinity. It was shown that the concentration of a and b chlorophylls, as well as carotinoids in leaves decreases with increasing NaCl concentration. The content of photosynthetic pigments under conditions of salinity was higher in resistant varieties than in unstable varieties. The quantitative content of photosynthetic pigments affects the intensity and productivity of photosynthesis which determines the yield of agricultural crops.