The experiment results indicated that cellulase activity in abscission zone from petiole of bean and cotyledon petiole of cotton was increased after treatment of GA_3, but it was inhibited by IAA.

• 这与GA_3促进菜豆叶柄和棉苗子叶柄外植体的脱落、IAA延迟脱落的效应成正相关。