Effects of physical and chemical factors on seed germination of Bupleurum dracaenoides

In this paper,the effects of different treatments on Bupleurum dracaenoides Huan C.Wang,Z.R.He&H.Sun seed germination were studied.Results showed that the optimum germination temperature for B.dracaenoides was 20℃.Treatment with 100 mg/L of GA₃,0.5% KMnO₄,and 3% H₂O₂ improved seed germination,but did not advance seed germination and emergence time.Microwave radiation significantly improved the seed germination rate,with 25 s found to be the optimal radiation time.The most effective ultraviolet radiation treatment time for seed germination was 0.5 h,with a germination rate of 81%.When the ultraviolet radiation time was gradually increased,the germination potential of seeds was inhibited to different degrees.Thus,optimal treatment to maximize B.dracaenoides seed germination was to soak seeds in 100 mg/L of GA₃ for 12 h at a temperature of 20℃.