【摘要】 本文以沙葱休眠种子为试材,检测其种皮透水性、透气性、超微结构、种胚休眠及种子浸提液。结果表明,酸蚀种子吸水12h达饱和,吸水率是完整种子的2倍;其呼吸强度最大值是完整种子的1.36倍。酸蚀处理使种子表面结构破损,角质层脱落,种孔露出。沙葱种子离体胚接种培养后2～3d,种胚开始萌发,萌发率达85%。沙葱完整种子与粉碎种子的浸提液对白菜种子发芽率、苗高、根长均有抑制作用,且随着浓度的提高而增强。更多还原

【Abstract】 The water permeability,air permeability,seed coat ultrastructure,embryo dormancy and seed leach liquor of Allium mongolicum seed were determineed.The results showed that etched seed was saturated with water after 12 h,its water absorption rate was twice that of the whole seed,and its respiration intensity maximum was 1.36 times of the whole seed.Etching damaged the seed surface structure,made the cuticle shedding and micropyle exposed.The in vitro embryo of Allium mongolicum seed began to germinate after culture inoculation of 2-3 d,and germination rate reached 85%.The leach liquor of the whole and etched seed both had an inhibiting effect on the germination rate,seedling height and root length of Chinese cabbage.As the concentration increased,the inhibition enhanced.更多还原