Abstract: In white mature period of Mu jujube, treating the fruits with different plant hormones 6-BA, IAA, GA₃ and ABA, the regulatory effect of them on the ripening and senescence of fruits were studied through the detection of physiological and biochemical changes. Results showed that： the contents of DNA in jujube fruit after 6-BA, IAA, GA₃ and ABA treatment varied significantly, and the effects with ABA and 6-BA treatment were the most;the contents of MDA in jujube tissue after GA₃ and IAA treatment were significantly lower than those in the control group, and the results after 6-BA and ABA treatment were contrary;the contents of proline in jujube tissue were significantly lower than those in the control group except ABA treatment, and the contents of Vc were in the opposite; the CAT activity differed greatly, the CAT activities with ABA and 6-BA treatment were significantly higher than those in the control group, and those with IAA and GA₃ were contrary. In conclusion, the physiological role of 6-BA, IAA, GA₃ and ABA presented as the mutual promotion and antagonists in many ways, and showed their regulations on ripening and senescence in Mu jujube fruit.

Key words: Mu jujube, plant hormone, physiological and biochemical, senescence, regulation