Abstract: The relationship between the endogenous hormones and embryo abortion‘Jinhuang’ mango fruit at early development stage was investigated. The results showed that the fruit embryo abortion was finished within 30 d，indicating 20–30 d could be critical period for embryo development. The difference in size between embryo normal and abortion fruit mainly depended on the fruit flesh；The IAA，ABA contents in embryo aborted were higher than those in the seed at the initial stage，but the lower contents of GA₃ and ZT were observed，compared to those in the normal embryo. In contrast to seed fruit，the lower GA₃ contents while higher ZT，IAA and ABA levels were existed in embryo abortion fruit pulp. Moreover，the higher contents of GA₃ and ZT and lower ABA level were favorable to normal embryo development. The decreased ZT，enhanced ABA contents as well as lower（GA₃ + IAA + ZT）/ABA ratio in embryo comparing with those in pulp were important factors leading to embryo abortion. During fruit development，with the embryo aborted，the lower ratio of（GA₃ + IAA+ ZT）/ABA in embryo and pulp were the important reasons resulting in small size in seedless fruit.

Key words: mango, embryo abortion, endogenous hormone