【摘要】 <正> 刺楸(Kalopanax septemlobus.Thunb.Koidz)是我国特有的珍贵落叶乔木,适应性广,抗性强,材质独特,应用十分广泛。刺楸的树皮、花和枝是活血去风湿的重要药材。种子可榨取工业用油,有很高的经济价值。但由于种子休眠期长达一年以上,一直未能找出解除种子休眠的最佳方法,给林业生产带来了极大的困难,限制了该树种的更多还原

【Abstract】 The study shows that Kalopanax seed embryo is under differentiation and dormant by means of tissue culture technique, although the seed is mature. Differentiation of the isolated embryos complete until GA, and 6—BA is presen’t. The embryos stratified at 15—20℃ are sensitive to 6—BA, while the embryos stratified at 0—15℃ response to GA,. Embryos can germinate after 3—4 months of warm stratification, though GA, and 6—BA are not added in media, but the seed still keeps dormant state except following stratified at 0—5℃ for 3 months. Stratified embryos (undormant) are covered with dry seed endosperm and stratified seed shows that only dryseed endosperms can inhibite embryo growth. The study indicates that the seed from dormant to germinating state mast take two different phases, that is, morphological afterripening phase needed for warm stratification and physiological afterripening phase for cold treatment.The relationship between cotyledon and embryo is given. Also theauthor adyances some views on embryonic dormancy.更多还原