硒对烟草种子萌发和幼苗生长的影响

目的]研究硒对烤烟云烟87和红花大金元种子萌发及幼苗生长的影响。方法]通过不同浓度亚硒酸钠(0、0.5、2.0、4.0、8.0mg/L)浸种处理,对发芽率、根系和光合色素含量进行探讨。结果]低浓度处理(0~2.0 mg/L)对2个品种的萌发有促进作用,在硒浓度为2.0 mg/L时发芽率达最大值;当硒浓度为2.0和4.0 mg/L时,云烟87和红花大金元幼苗根系活力分别达最大值,其后随处理浓度的增大幼苗根系活力有所下降;2个品种各处理的光合色素含量均显著高于对照,且在处理浓度为4.0 mg/L时达最大值。结论]该研究为后期富硒烟叶的生产、卷烟安全性的提高提供理论指导。

Effects of Se on the Tobacco Seed Germination and Seedling Growth

Objective] To research the effects of Se on seed germination and seedling growth of flue-cured tobacco Yunyan 87 and Honghuada-jinyuan.Method] After soaked in different concentrations of sodium selenite (0,0.5,2.0,4.0 and 8.0 mg/L),we researched the germination rate,root system and photosynthetic pigment contents.Result] Low concentration treatment (0-2.0 mg/L) promoted the germination of two cultivars.And the germination rate reached the maximum at 2.0 mg/L Se.When Se concentration was 2.0 and 4.0 mg/L,the root activities of two cultivars reached the maximum,and then reduced as the concentration enhanced.Photosynthetic pigment contents of two cultivars were significant-ly higher than that of control,and reached the maximum at 4.0 mg/L Se. Conclusion] This research provides theoretical guidance for the en-hancement of production of selenium enrichment tobacco leaves and the safety of cigarette .