6月初香梨落果中GA3、IAA含量高于发育正常的果实 ,ABA含量几无变化。 7月底、8月初果实迅速膨大期间 ,无论裂果与否的果实中均未检出IAA ,但裂果中GA3 和ABA含量均高于而GA3/ABA则低于发育正常果实。萼端突起部位的内源激素含量高于梨身 At the beginning of June, the content of GA3 and IAA in pear drop fruit was higher than that in normal development, and there was no change in ABA content. During the rapid expansion of fruits at the end of July and the beginning of August, both IAA and IAA were not detected in fruits with or without fruit cracking, but both GA3 and ABA content in fruit cracking were higher than those in GA3 / ABA. Calyx side of the protruding endogenous hormone content than pear body