Abstract:

To investigate the influence of gibberellin GA of different concentrations on kernal development, this experiment adopted the method of culture in vitro with the materials of maize hybrids of ‘Nongdan NO.5’ and ‘Nongda 108’, and focused on the gibberellin GA’s influence on kernal’s germination rate, abortion rate, α-amylase activity, dry weight and fresh weight. The result showed: in a low concentration of GA (0 mg/L~1 mg/L), kernal’s germination rate, α-amylase activity and abortion rate raised with the increase of GA’s concentration while the dry weight and fresh weight decreased; in a high concentration of GA (1 mg/L~20 mg/L), the situation reversed. While GA’s concentration was 1 mg/L, kernal’s germination rate α-amylase activity and abortion rate reached the maximum value. While GA’s concentration was 20 mg/L, they dropped to the minimum value, but the dry weight and fresh weight reached to the maximum value in this concentration and higher than the control group. Thus the spraying of GA (20 mg/L) in pollination period will help the corn production in a certain degree.