【摘要】 对‘苹果梨’花芽分化各时期叶片中过氧化物酶 (POD)、吲哚乙酸 (IAA)氧化酶、蔗糖酶和过氧化氢酶 (CAT)活性进行研究 ,前三者在花芽分化临界期 (7月 2 3日 )达高值 ,而后者处于低值 ;在花蕾、花萼分化期CAT活性增强 ,蔗糖酶、IAA氧化酶、POD活性降低 ;花瓣、雄蕊、雌蕊分化期POD、IAA氧化酶活性增加 ,蔗糖酶变化不大 ,CAT降至最低更多还原

【Abstract】 The change of peroxidases(POD),catalase(CAT),IAAoxidase and sucrase activity in leaves during flower bud differentiation of“Pingguoli”was studied.The results showed that POD,IAAoxidase and sucrase activity were high,but CAT activity was low in the critical period of flower bud differentiation(23,July).CAT activity increased,sucrase activity decreased and IAAoxidase,POD activity decreased little during alabastrum,calyx differen tiation. POD,IAAoxidase activity gradually increased,sucrase activity didn’t change significantly,CAT activity declined to the lowest during petal,stamen,pistil differentiation.更多还原