不同pH赤霉素引发对烟草种子萌发和幼苗素质的影响

以MS云烟87、MSK326和红花大金元种子为材料，研究了不同pH的赤霉素（GA3）引发对种子萌发和幼苗素质的影响。结果表明，MS云烟87经pH3．0的50mg／LGA3引发，幼苗茎高和苗高分别提高0．59和0．40cm；对于MSK326，用pH3．0的50mg／LGA3引发效果优于其他处理，种子平均发芽时间较对照缩短0．43d，发芽指数提高12．98％，幼苗根长、茎高及苗高分别提高0．28、0．33和O．61cm；红花大金元经pH3．0的50mg／LGA3引发，种子平均发芽时间较对照缩短0．36d，发芽指数提高10．82％，幼苗茎高和苗高分别提高0．18和0．43cm。此研究结果说明，pH影响引发效果，用GA3引发时应选择适宜的pH。

Effects of Gibberellin Priming with Various pH Values on Tobacco Seed Germination and Seedling Quality

Seeds of MS yunyan 87, MS K326 and honghuadajinyuan were used to study effects of gibberellin （GA3） priming with various pH values on the seed germination and seedling quality. The results showed that the priming treatment of MS yunyan 87seeds with 50 mg/L GA3 with pH 3.0 increased their stem height 0.59 cm and seedling height 0.40 cm. The priming treatment of MS K326 seeds with 50 mgFL GA3 with pH 3.0 shorten their mean germination time 0.43 d, increased germination index 12.98%, seedling root length 0.28 cm, stem height 0.33 cm, and seedling height 0.61 cm. The priming treatment of hongda seeds with 50 mg/L GA3 with pH 3.0 shorten mean germination time 0.36 d, increased germination index 10.82%, stem height 0.18 cm, and seedling height 0.43 cm. In conclusion, that pH value could influence priming effect, and the best pH value should be chosen when seeds were primed with GA3.