Effects of GA3 and Kinetin Pre-Sowing Treatments on Seedling Emergence and Seedling Growth in Wheat under Saline Conditions

摘要

his study was conducted to evaluate the effect of NaCl salinity and Gibberellic Acid (GA3) and Kinetin (KIN) pre-sowing treatments on the germination and emergence of 3 winter-wheat cultivars. Thus, the seeds soaked with GA3 and kinetin were germinated using 0, 94, 164 and 240 mM NaCl solutions in pod soil. The percentage seedling emergence of wheat genotypes decreased and delayed with salinity stress conditions. The pre-treatments of hormones, especially GA3, not only hastened seedling emergence but also overcame the germination-delaying effect of the high concentrations of NaCl in all investigated wheat genotypes except for initial germination of Kisla domestic variety. Exogenous kinetin treatment was not as effective as GA3. Seedling growth parameters under salt-stress conditions decreased with increased salt stress. Under salinity conditions, GA3 was significantly stimulated root length and shoot height in Kisla domestic variety and B-22 line, respectively.