首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Activation of defense responses in Chinese cabbage by a nonhost pathogen, Pseudomonas syringae pv. tomato
Authors:Park Yong-Soon  Jeon Myeong Hoon  Lee Sung-Hee  Moon Jee Sook  Cha Jae-Soon  Kim Hak Yong  Cho Tae-Ju
Institution:Division of Life Sciences, Chungbuk National University, Cheongju 361-763, Korea.
Abstract:Pseudomonas syringae pv. tomato (Pst) causes a bacterial speck disease in tomato and Arabidopsis. In Chinese cabbage, in which host-pathogen interactions are not well understood, Pst does not cause disease but rather elicits a hypersensitive response. Pst induces localized cell death and H2O2 accumulation, a typical hypersensitive response, in infiltrated cabbage leaves. Pre-inoculation with Pst was found to induce resistance to Erwinia carotovora subsp. carotovora, a pathogen that causes soft rot disease in Chinese cabbage. An examination of the expression profiles of 12 previously identified Pst-inducible genes revealed that the majority of these genes were activated by salicylic acid or BTH; however, expressions of the genes encoding PR4 and a class IV chitinase were induced by ethephon, an ethylene-releasing compound, but not by salicylic acid, BTH, or methyl jasmonate. This implies that Pst activates both salicylate-dependent and salicylate-independent defense responses in Chinese cabbage.
Keywords:
本文献已被 PubMed 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号