Physiological and Biochemical Mechanisms of Exogenously Applied Selenium for Alleviating Destructive Impacts Induced by Salinity Stress in Bread Wheat

Salinity is a major abiotic stress that poses great obstacles to wheat production, especially in arid regions. The application of exogenous substances can enhance plant salt tolerance and increase its productivity under salinity stress. This work aimed assess the mechanisms selenium (Se) at different concentrations (2, 4 8 ?M SeCl2) mitigate hazardous impacts toxicity physiological, biochemical agronomic levels bread wheat. results displayed Se foliar increased chlorophyll content, net photosynthetic rate, transpiration stomatal conductance, relative water membrane stability index, excised leaf retention, proline, total soluble sugars, Ca K antioxidant enzyme activities non-enzymatic compounds compared untreated plants. On other hand, decreased content Na, hydrogen peroxide superoxide contents. Accordingly, our findings recommend (in particular ?M) alleviate deleterious effects induced by improve yield attributes through enhancing defense systems capacity.