The relationship between embryonic development and endogenous hormones in the ovules of 'Luhebao' (a variety with early embryonic abortion) and of 'Wuye' (a variety with normal embryonic development) was studied. The results showed that in .'Luhebao' ovules ABA content and the ratios of ABA/(IAA+GA1+3) to ABA/(ZRs+DHZRs+iPAs) remained at a relatively high high level at the initial stage of the embryonic abortion, but IAA, GA1+3 and CTK content began to drop rapidly from the 7th day after anthesis and rema...