Stomatal Regulation and Osmotic Adjustment in Sorghum in Response to Salinity

Sorghum bicolor (L.) Moench, one of the most important dryland cereal crops, is moderately tolerant soil salinity, a rapidly increasing agricultural problem due to inappropriate irrigation management and salt water intrusion into crop lands as result climate change. The mechanisms for sorghum’s tolerance high salinity have not been elucidated. This study tested whether sorghum plants adapt stress via stomatal regulation or osmotic adjustment. were treated with seven concentrations NaCl (0, 20, 40, 60, 80, 100 mM). Leaf gas exchange (net CO2 assimilation (A), transpiration (Tr); conductance vapor (gs), intrinsic use efficiency (WUE)), (?w), (?o), turgor ?t potentials evaluated at 40 days after imposition treatments. Plants exhibited decreased A, gs, Tr whereas WUE was affected by treatment. Additionally, adjustment salinity. Thus, appears both regulation.