甜樱桃休眠期枝条SOD·POD酶活性变化研究

Study on the Changes of Enzyme Activities of SOD and POD in the Dormant Branches of Different Sweet Cherry Varieties

[目的]研究甜樱桃枝条休眠期内SOD、POD酶活性的变化规律,探讨其抗寒性。[方法]以4个甜樱桃品种1年生枝条为试材,测定不同时期的SOD、POD酶活性变化。[结果]试验表明,甜樱桃4个品种的SOD、POD酶活性随温度的降低而升高,随气温的回升而降低,1月份达到最高值。4个品种的SOD、POD酶活性均为龙冠较高,显著高于其他3个品种,表现出较强的抗寒性;龙宝、红蜜次之;龙丹的SOD、POD酶活性均低于其他3个品种,抗寒性较弱。[结论]甜樱桃4个品种的抗寒性大小排序为:龙冠>龙宝>红蜜>龙丹。

[Objective] The purpose was to study the change laws of SOD（superoxide dismutase）and POD（peroxidase）activities in dominant branches of different sweet cherry varieties and discuss its cold resistance.[Method] With one-year-old dormant branches of four sweet cherry varieties as test materials,the activities of SOD and POD in different periods were measured.[Result] The results showed that the activities of SOD and POD in four sweet cherry varieties increased with the decreasing of temperature,then decreased with the increasing of temperature and reached the maximum in January.Among four varieties of sweet cherry,SOD and POD activities in Longguan were all significantly higher than the other three varieties,showing stronger cold resistance.Longbao and Hongmi were the second.And the activities of SOD and POD in Longdan were all lower than the other three varieties,showing weaker cold resistance.[Conclusion] The cold resistance order of four sweet cherry varieties was as follows： Longguan〉Longbao〉Hongmi〉Longdan.