| To study the effect of uniconazole on seed germination characteristics and seedling quality of millet under salinity stress, seeds soaked with uniconazole solution were used for analysis. The results showed that compared with no soak and soak in distilled water treatments, soak in uniconazole under salinity stress significantly increase the germination energy and germination rate of NF5, whereas did not affect or even inhibit those of QS1. Seedling heights of both NF5 and QS1 were inhibited by uniconazole, and the inhibitory effects became enhanced with the increase of uniconazole concentration. All soak treatments with uniconazole increased the lateral root number and total length of lateral root in both varieties, except for the T5 treatment on NF5. All uniconazole treatments inhibited main root length of NF5, while high concentrations (T4 and T5) increased that of QS1. Different soak treatments with uniconazole inhibited the activities of SOD in leaves and roots of NF5 and leaves of QS1, whereas T1 and T2 treatments increased those in root of QS1. Uniconazole with appropriate concentration (25～100 mg·L-1) elevated the activities of APX in leaves and roots of both varieties. In conclusion, although uniconazole treatment T3 (100 mg·L-1) had no positive or even negative functions on seed generation, it could enhance weight of seedling, promote development of lateral root, increase activities of protective enzymes, resulting in uniformed emergence of strong seedlings in the field through increasing sowing rate. |