河南农业科学2013，Vol.42Issue(3)：71-75,5.
内生菌XG-1对西瓜枯萎病诱导抗性的研究
Induced Resistance of Endophyte XG-1 against Fusarium Wilt of Watermelon
摘要
Abstract
This experiment studied the induced resistance of endophytic bacterium XG-1 against Fusarium wilt of watermelon by taking the content variation of MDA and the activity variation of four defense enzymes including PAL,POD,PPO and CAT as the indexes. The results showed that the activities of the four defense enzymes in leaves of watermelon plants treated by bacterial suspension of endophyte XG-1 were all higher than the control. After the leaves were treated by XG-1 bacterial suspension and Fusarium oxysporum f. sp niveum (FON),the activity of PAL showed two peeks on the 4th day and the 10th day,l. 86 and 1. 52 times higher than the control, respectively; the activities of POD and PPO both exhibited the peek on the 4th day,increased by 52. 6% and 57. 1%,respectively; the activity of CAT exhibited the peek on the 5th day,increased by 56. 4%;MDA content firstly descended and then gradually ascended,falling to the lowest on the 4th day,dropped by 33. 1%. The results suggest that induced resistance is one of the important mechanisms by strain XG-1 in control of watermelon Fusarium wilt.关键词
西瓜枯萎病/内生细菌/诱导抗病性/防御酶/丙二醛Key words
Fusarium wilt of watermelon/ endophyte/ induced resistance/ defense enzyme/ MDA分类
农业科技引用本文复制引用
孙正祥,王丰,周燚..内生菌XG-1对西瓜枯萎病诱导抗性的研究[J].河南农业科学,2013,42(3):71-75,5.基金项目
湖北省教育厅中青年项目(Q2011130) （Q2011130）
