两个牡丹切花品种低温贮藏过程中抗氧化酶活性的变化

 本文报道了牡丹( Paeonia suffruticosa) 切花品种‘紫霞仙’和‘朱砂垒’在2℃低温贮藏过程中几种抗氧化酶活性的变化。结果表明, 两种牡丹切花随贮藏期延长瓶插寿命缩短, 花瓣中蛋白质含量下降, 丙二醛含量上升, 细胞膜相对透性增加; 同时, 超氧化物歧化酶活性和过氧化氢酶活性先上升后下降。品种间的差异在于‘紫霞仙’的开花率、盛花持续天数及几种抗氧化酶活性均高于‘朱砂垒’, 说明‘紫霞仙’比‘朱砂垒’抗衰老, 耐贮藏。

Changes of the Activities of Enzymes Related to Antioxidation in Cut Peony Flowers during Low Temperature Storage

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.Zixiaxian's 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'.