中国农业科学2008，Vol.7Issue(1)：82-87,6.
Enhancement of Phenylalanine Ammonia Lyase, Polyphenoloxidase, and Peroxidase in Cucumber Seedlings by Bemisia tabaci(Gennadius) (Hemiptera: Aleyrodidae) Infestation
Enhancement of Phenylalanine Ammonia Lyase, Polyphenoloxidase, and Peroxidase in Cucumber Seedlings by Bemisia tabaci(Gennadius) (Hemiptera: Aleyrodidae) Infestation
摘要
Abstract
In this study, the activities of phenylalanine ammonia lyase (PAL), polyphenoloxidase (PPO), and peroxidase (POD) were assayed in cucumber seedlings (Cucumis sativus L.) at 0, 6, 12, 24, 48, 72, and 96 h after they were infested by Bemisia tabaci (Gennadius) using spectrophotometric analysis. The results indicated that herbivore infestation increased the activities of PAL, PPO, and POD. The enzymes showed different activity levels at different times after the infestation. The PAL activity reached the first high peak by 23.1% at 6 h and the highest peak by 29.1% at 48 h compared to the control. The PPO activity reached the first high peak by 22.7% at 6 h and the highest peak by 52.6% at 24 h, and the POD activity reached the highest peak by 213.2% at 6 h and another higher peak value by 135.2% at 96 h. The results suggest that the enhanced activities of the enzymes may contribute to bioprotection of cucumber plants against B. Tabaci infestation.关键词
phenylalanine ammonia lyase, polyphenoloxidase, peroxidase, Bemisia tabaci, induce responseKey words
phenylalanine ammonia lyase, polyphenoloxidase, peroxidase, Bemisia tabaci, induce response分类
农业科技引用本文复制引用
..Enhancement of Phenylalanine Ammonia Lyase, Polyphenoloxidase, and Peroxidase in Cucumber Seedlings by Bemisia tabaci(Gennadius) (Hemiptera: Aleyrodidae) Infestation[J].中国农业科学,2008,7(1):82-87,6.基金项目
This research was suppotred by the National Basic Research Program of Minsistry lr Science and Technology,China (973 Program,2006CB102005-3). （973 Program,2006CB102005-3）
