摘要
聚乙二醇（Ｐｏｌｙｅｔｈｙｌｅｎｅｇｌｙｃｏｌ）简称ＰＥＧ，是一种高分子渗压剂，其突出的优点是它本身不能渗入活细胞。用不同分子量、不同浓度的ＰＥＧ渗透调节樟子松（ＰｉｎｕｓｓｙｌｖｅｓｔｒｉｓＬ．ｖａｒ．ｍｏｎｇｏｌｉｃａ），能提高种子的活力，促进种子萌发、增进老化种子在吸胀中的修复能力，提高出苗的整齐度，并能提高其抗性。试验结果表明，各种分子量的ＰＥＧ均可提高种子的活力，但以２０％的浓度效果最好，１０％及５％次之，３０％的浓度较差。
polyethylene glycol(PGE)is a permeable agent with bigmolecular Weight(MW),Its main advantage is that it impermeate intoviable cells,Mongolian Scotch pine seeds pretreated with different MW PEG solutions of different concentrations increased.in seed vigour,enhan-ced in germination,improved in repair of aged seeds during imibing, inc-reased in uniformity of emerged seedling and in resistance,It was shown from this paper that PEG with different MW all could increased seedvigour,Effect of 20% PEG solution was best,while 10%and 5%were sec-ondary,30%was worst.
关键词
聚乙二醇
渗透调节
樟子松
发芽
种子
PEG
Osmotic pretreatment
Germination index
vigourindex
