Abstract: This paper studied the effects of exogenous ABA and ethephon treatment on the changes of endogenous ABA,IAA and GA levels and the fruit quality changes during -1℃storage.After exogenous ABA 50mg/L and ethephon were applied to green“winter Jujube”.The results showed that endogenous ABA level and TSS content in-creased gradually and after 45 days storage ABA content reached the highest level as 697.1ng/g with the peak 10 days earlier than untreated control (401.2ng/g)at the red maturity stage.The exogenous ethephon(1000×10-6)treatment at the early storage enhanced the increase of endogenous ABA level and mean while decreased the endogenous IAA and GA level.Following the ripening of the Jujube the endogenous ABA and TSS levels gradually increased again while the firmness,chlorophyll and VC content decreased with the development of maturity in “winter Jujube”.It was found that ABA level was negatively correlated with the firmness of “winter Jujube”(r=0.8516).The possible interaction between the ripening of “winter Jujube”and ABA was further dis cussed in the paper.

Key words: winter Jujube, ABA, IAA, GA, ethylene, maturity