预培养温度和渗透势对寄生植物列当种子发芽影响

he effects of preconditioning temperature and water potential on germination of parasitic plant Orobanche seeds were studied in the experiment, and the method of quantitative trait with orthogonal polynomials was applied to analyze Orobanche seed germination percentage by regression model. The results showed that the highest germination percentage could be observed after Orobanche seeds conditioned at 18℃ and 0MPa for 7 days. The linear or quadratic regression between germination percentages of O. aegyptiaca, O. ramosa seeds and preconditioning temperature or water potential was obtained. Their regression parameters mostly reached the most significant level, and the effect of preconditioning temperature or water potential on germination percentage could be predicted. However, for O. minor, there was no linear or quadratic regression relationship between germination percentage and preconditioning temperature or water potential.