不同药剂浸种处理对烟草种子活力和幼苗生长的影响

摘要

探讨了4种药剂浸种处理对烟草种子活力及幼苗生长的影响.以云烟203和MS云烟85种子为材料,研究不同浓度油菜素内酯(BR)、赤霉素(GA)、水杨酸(SA)和氯化钙(CaCl2)浸种处理后对发芽、幼苗生长以及保护酶活性与丙二醛(MDA)含量的影响.结果表明,四种药剂最佳的浸种浓度分别为1.0 mg/L BR,50 mg/L GA,120 mg/L SA,10 mg/LCaCl2,均显著提高了烟草种子的发芽势、发芽率与发芽指数,降低平均发芽时间和MDA含量.以1.0 mg/L BR和50mg/L GA浸种对促进种子萌发和幼苗生长效果最为明显.%The study was performed to explore the effects of different soaking treatments on seed vigor and seedling growth of tobacco cv. Yunyan 203 and MS Yunyan 85. The germination, seedling growth, protective enzymes activities and the content of MDA were tested after seed soaking treatments with different concentrations of brassiolins ( BR), gibberellins ( GA) , salicylic acid ( SA) and CaCl2. The results showed that the best concentration for each reagent were 1.0 mg/L BR,50 mg/L GA,120 mg/L SA and 10 mg/L CaCl2,the four treatments could improve the germination energy, germination percentage, germination index and decrease the content of MDA. Among all the treatments, 1.0 mg/L BR and 50 mg/L GA were the most effective treatments to improve seed vigor and seedling growth.