Abstract:
The effects of different treatments such as pretreatment time, temperature, light, plant growth regulator, low temperature stratification and storage time on dormancy and germination characteristics of Striga asiatica seeds were investigated. The results showed that there was no need for light for seed germination, and the optimum germination temperature was 30 ℃ and the pretreatment time for 13 days, of which the germination rate was the highest. There existed a physiological dormancy for Striga asiatica. GR 24 could effectively break the dormancy, and the germination rate was significantly higher than that treated with GA, 6 KT, ABA and TZ(p<0.05). The germination rate of Striga asiatica seeds stored for 80 to 180 days was higher than 80%. The germination rate of Striga asiatica seeds stored for too short time(10 days) or too long time(365 days) was lower, indicating that Striga asiatica seed dormancy was a dynamic process. Low temperature could lead to secondary dormancy and dormancy cycle.