甜菜种子品质的调控与改进技术研究Ⅰ．PEG渗调、吸湿－回干对不同活力种子发芽的调控效应  

A Study on Regulation of Sugarbeet Seed Quality . Effects of PEG Osmoconditioning and Hydration- Dehydration on Germination of Seeds with different Vigor

作　　者：张春来[1] 彭顺芬[1] 郭景南 

机构地区：[1]中国农业科学院甜菜研究所

出　　处：《中国甜菜》1994年第1期13-18,共6页

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 

分 类 号：S566.303.2[农业科学—作物学]