苹果幼果果糖和葡萄糖对淀粉酶活性的负调节

Negative Regulation of Amylase Activity by Fructose and Glucose in Growing Apple Fruits

用红富士苹果进行的研究表明 ,环剥处理使幼果内蔗糖、果糖和葡萄糖含量降低 ,淀粉酶活性升高。当果实内淀粉含量不足对照的 1/ 3时 ,淀粉酶活性与对照持平或降至对照之下。以外源糖温育果实圆片试验表明 ,果糖和葡萄糖诱导了淀粉酶活性的下降。

The experiment conducted with Red Fuji apple( Malus domistica Borkh)showed that the girdling resulted in a decrease of sucrose,fructose and glucose contents and induced an amylase activation.The amylase activity began to decline on 3 rd day of treatment from the high level and deceased to the control level when starch content in the treated fruits was lower than 1/3 of the control.Incubation of the fruit discs in the medium containing the soluble sugars showed that fructose and glucose induced the decrease of amylase activity.It is considered that the changes in fructose and glucose concentration in the fruits may be a signal regulating the amylase activity.