Abstract: Here reports the changes of the activity of enzymes related to antioxidation in cut peony flowers‘Zixiaxian’and ‘Zhushalei’at two degrees centigrade in the storage in this research. Results showed that changes of protein content, MDA content, the plasma membrane permeability, SOD activity and CAT activity were similar to both the ‘Zixiaxian’ and‘Zhushalei’. Although the vase life of peony flowers was shorten during storage but protein content in petal decreased and MDA content and the plasma membrane permeability increased. Meanwhile SOD and CAT activity in petal were up and then down with the storage time prolong. Zixiaxianps opened flower percentage, from full opening to wilting and some activity of enzymes related to antioxidation were higher than‘Zhushalei’. These results demonstrated that the activities of resisting senescence and storage of‘Zixiaxian’were higher than ‘Zhushalei’.

Key words: Peony, Cutting flower, Storage, MDA, SOD, CAT