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Title:: Effects of Intercropping Lupin on Malondialdehyde Content in Kiwifruit Leaf and Fruit

Author(s):: WANG Xiaoling1; YU Yizun1; GAO Zhu1; 2; HUANG Guochang1; LIU Xiaoning3; (1.Institute of Biological Resources,Jiangxi Academy of Sciences,Nanchang,Jiangxi 330096;2.College of Landscape Architecture and Art,Jiangxi Agricultural University,Nanchang,Jiangxi 330045;3.Jiangxi Expo Science and Technology of Agricultural Development Limited Liability Company,Nanchang,Jiangxi 330096)

Abstract:: From June to October,the change of malondialdehyde (MDA) content was studied on the leaf and fruit of ‘Hongyang’ ‘Jinyan’ and ‘Jinkui’ kiwifruit orchards of eight years for intercropping lupin so as to master the effect of intercropping on high temperature stress.The results showed that the MDA content of ‘Hongyang’ was the highest,‘Jinkui’ was second,and ‘Jinyan’ was the lowest in the course of natural growth.The variation trend of MDA content in three kiwifruit leaves was first increased,then decreased,and the peak time of MDA in ‘Hongyang’ leaves was earlier than that of ‘Jinyan’ and ‘Jinkui’.Intercropping could significantly reduce MDA content in the leaves of three kinds of kiwifruit,and the average MDA content in the leaves of ‘Hongyang’‘Jinyan’ and ‘Jinkui’ decreased by 16%,30% and 25% respectively.However,intercropping reduced the average MDA content of ‘Jinyan’ and ‘Jinkui’ fruits by 20% and 31% respectively,but failed to reduce the MDA content of ‘Hongyang’ fruits.Different kiwifruit varieties had different tolerance to natural high temperature stress,‘Jinyan’ had the strongest tolerance and ‘Hongyang’ has the weakest.Therefore,it was necessary to study the physiological and molecular mechanisms by which intercropping lupin to strengthen leaf and fruit resistance.It was also helpful to solve the problem of decreasing yield and quality of kiwifruit after high temperature stress.