摘要
研究甜菜种子播种品质的调控和改进对甜菜生产有重要意义。甜菜种子在不同温度下，应用不同浓度、处理时间的ＰＥＧ渗调及吸湿－回干预处理，研究了不同活力种子的发芽能力及幼苗生长的反映。结果表明：随贮藏年份的增加，种子发芽率和活力先呈缓慢下降，后迅速下降；ＰＥＧ处理（Ｔ＿２Ｃ＿３Ｄ＿２）显著提高了种子活力，还提高了种子发芽势、发芽率，下胚轴长、根长及健苗率。吸湿－回干处理也明显提高了甜菜种子的发芽及幼苗生长能力。本文对上述方法的应用及其生理机制进行了讨论。
S Study on regulation and improvement of seed quality is very useful to sugarbeet produc-tion. The response of germination power and seedling growth of sugarbeet seeds with differ-ent vigor was investigated by different concentration and duration of PEG osmoconditioningunder the different temperature and hydration-dehydration treatment.The results indicatedthat:As periods being stored enlongated,germination percentage and vigor decrcased firstgradually,later rapidly.PEG treatment(T_2C_3D_2)significantly enhanced the seed vigor,germination energy,percentage,length of hypocotyl and root length healthy seedling percentalso be increased,The performance of seed germination and seeding growth also be im-proved significantly by hydration-dehydration treatment.The possible utilization of these tech-niques and their physiological mechanism were discussed.
关键词
甜菜
种子品质
种子活力
PEG渗调
Sugarbeet
Seed quality
Seed vigor
PEG osmoconditioning
Hydration-dehydration
