Gibberellic Acid Influence on the Seeds Quality of Sorghum (Sorghum bicolor L. Moench)

Poor germination is one of the problems facing most field crops including sorghum. A factorial experiment was implemented in the laboratories of the desert studies center, to evaluating the GA 3 influence on sorghum cultivars seeds quality. Two factors was contained this study, the first represented three stimulation concentrations of gibberellic acid (0.5, 1 and 1.5 g L −1 ) in addition to soaking seeds with distilled water (control), whilst the second represented three sorghum cultivars (Wed Ahmed, Babel and Rabeh). A completely randomized design (CRD) with four replicates was utilized. The findings indicated that the soaking seeds with GA 3 significantly excelled on the studied parameters, the soaking seeds at a 1.5 g L −1 achieved the highest averages of germination rate (95.0%), length of radicle, plume length, seedling dry weight (0.287 g) and antioxidants (CAT and SOD). Regarding of sorghum cultivars, they were significantly varied in most of the studied parameters; the cultivar of Rabeh recorded the highest average of seedling fresh weight (2.47 g), while the Babel cultivar had the highest CAT activity (24.26 unit g −1 ). The two studied factors interaction was significantly influence on the most studied parameters.