Improvement of physiological traits of sugar beet cultivars (Beta vulgaris) under drought stress conditions with spraying of salicylic acid

Environmental constraints such as heat stress, drought, salinity, heavy metals and nutritional deficiencies limit the production of plants. In a research, it has been observed that salicylic acid treatment controls polysaccharide hydrolyzing enzymes and accelerates the formation of polysaccharides from soluble sugars. With this assumption, salicylic acid increases the amount of insoluble sugars compared to soluble sugars. Plants obtained from seeds pretreated with salicylic acid can improve the rate of photosynthesis in normal and stress conditions by transpiration intensity, increasing the relative water content, stomatal conductance and leaf chlorophyll index. This research aims to study the effect of drought stress on the quantitative and qualitative yield of sugar beet cultivars and to investigate the physiological changes of soluble sugars, proline amino acid, electrolyte leakage and also the reduction of harmful nitrogen, sodium and potassium from different treatments of salicylic acid in irrigation periods was conducted. In total, in the conditions of drought stress, the consumption of 3 mM and 6 mM per liter of salicylic acid had a positive effect on the harmful nitrogen, sodium and potassium amounts, and salicylic acid also caused sugar content, sugar yield and root yield per unit area (with increasing The relative content of leaf water, reducing the leakage of electrolyte in the membrane and increasing the amino acid proline in the leaf) will increase.