赣南脐橙生长发育期果实和叶片抗氧化酶生理调控机制  

Physiological Regulation Mechanism of Antioxidant Enzymes in Fruits and Leaves During Growth and Development of Navel Orange in Gannan Region

作　　者：王小玲[1] 幸学俊[1] 高柱[1,2] 杜建华 Wang Xiaoling;Xing Xuejun;Gao Zhu;Du Jianhua(Institute of Biological Resources,Jiangxi Academy of Sciences,Nanchang Jiangxi 330096,China;College of Landscape Architecture and Art,Jiangxi Agricultural University,Nanchang Jiangxi 330045,China;Nanchang Institute of Science&Technology,Nanchang Jiangxi 330108,China)

机构地区：[1]江西省科学院生物资源研究所,江西南昌330096 [2]江西农业大学园林与艺术学院,江西南昌330045 [3]南昌工学院,江西南昌330108

出　　处：《西南林业大学学报（自然科学）》2019年第6期19-23,共5页Journal of Southwest Forestry University：Natural Sciences

基　　金：国家自然科学基金项目(31760551)资助;江西省重大自然科学基金项目(20152ACB21002)资助

摘　　要：以赣南10年生纽荷尔脐橙为试验材料,探讨不同生长发育期果实和叶片中5种抗氧化酶(SOD、POD、CAT、APX和GR)活性变化对高温环境的适应性。结果表明:生长发育期5种抗氧化酶活性大小差异性显著,不同抗氧化酶之间存在着协作机制,其中SOD活性最大,CAT和POD次之;果实中5种抗氧化酶活性大小都低于叶片,果实SOD活性呈现“降低—升高”的趋势,与POD、CAT、APX和GR活性变化趋势“升高—降低”相反,其中POD、CAT、APX活性峰值和SOD活性谷值都出现在9月份;叶片中抗氧化酶活性都有一个活性峰值,SOD、CAT、APX和GR活性高峰都出现在9月份。因此,脐橙果实抗高温胁迫能力大于叶片,且7—9月份果实抗高温胁迫能力大于10—11月份;SOD、CAT和POD共同组成脐橙植物体抗高温胁迫的关键酶系统。The navel orange of 10-year-old mature was used as the experimental material to detect the adaptability to high-temperature environment of 5 antioxidant enzymes(SOD,POD,CAT,APX and GR)in fruits and leaves at different growth and development stages.The results showed that the activity of the 5 antioxidant enzymes varied significantly,and there was a coordination mechanism among different antioxidant enzymes.SOD activity was the largest,followed by CAT and POD.The activity of the antioxidant enzymes in fruits was lower than that in leaves.The activity of SOD in fruits showed a'decreased-increased'trend,contrary to the'increaseddecreased'trends of the activity of POD,CAT,APX and GR,among which the peaks of POD,CAT,APX activity and the valley of SOD activity all appeared in September.In leaves,there were peaks of activity of all antioxidant enzymes,with the peaks of SOD,CAT,APX and GR activity appearing in September.Therefore,the resist-ance to high temperature stress in fruits of navel orange was greater than that in leaves,and the resistance to high temperature stress in fruits from July to September was greater than that from October to November.SOD,CAT and POD constitute the key enzyme system against high temperature stress in navel orange.

关 键 词：脐橙 果实 叶片 抗氧化酶 生理调控 

分 类 号：S666.4[农业科学—果树学]