采用 CO_2激光和 He-Ne 激光辐射洋葱两个品种的湿种子,采用随机区组设计,重复3次,利用生物统计学和生理生化的方法,从个体及生化水平上考查激光诱变洋葱 L_1代须根的生物学效应,结果表明:在须根长、须根数、须根重、须根活力等方面,表现为不同处理引起的生物学效应差异,激光种类不同,须根长的变异达到5%的显著差异,激光剂量不同引起须根数变异达5%的显著水平,激光辐射对洋葱根系活力表现刺激效应,可作为激光诱变洋葱育种参考。 Two kinds of wet seeds of Onion were irradiated by CO_2 laser and He-Ne laser. The seeds were stochastically divided into 3 groups. The biochemical and physiological biochemical methods were used to examine the mutagenicity of L 1 The results showed that there were significant differences in the biological effects caused by different treatments in the aspects of the length of the root, the number of the fibrous roots, the root weight and the root activity. The variation of the length of the fibrous roots reached 5% Different doses of laser caused a significant level of 5% variation in the number of fibrous roots, and laser radiation showed a stimulating effect on onion root activity, which could be used as a reference for laser induced mutagenesis of onion.