生物技术通报 ›› 2013, Vol. 0 ›› Issue (7): 78-81.

• 研究报告 • 上一篇    下一篇

燕麦嗜酸菌鞭毛素的提纯及其活性检测

伍甜1,2 刘莹2 余超2 边强3 田芳2 黄琼1 陈华民2 何晨阳2   

  1. (1.云南农业大学植物保护学院 云南省植物病理重点实验室,昆明 650201;2.中国农业科学院植物保护研究所 植物病虫害生物学国家重点实验室,北京 100193;3.南开大学 农药国家工程研究中心,天津 300071)
  • 收稿日期:2013-03-22 修回日期:2013-07-19 出版日期:2013-07-19 发布日期:2013-09-02
  • 作者简介:伍甜,男,硕士研究生,研究方向:分子植物病理学;E-mail:wowutian2007@yahoo.com.cn
  • 基金资助:
    国家“863”计划项目课题(2012AA101504),植物病虫害生物学国家重点实验室开放基金资助项目(SKL2012OP10)

Purification and Activity Assay of Flage llin from Acidovorax avenae sub. avenae NB001

Wu Tian1,2 Liu Ying2 Yu Chao2 Bian Qiang3 Tian Fang2 Huang Qiong1 Chen Huamin2 He Chenyang2   

  1. (1. Yunnan Province Key Laboratory of Plant Pathology,Faculty of Plant Protection,Yunnan Agricultural University,Kunming 650201;2. State Key Laboratory for Biology of Plant Disease and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193;3. National Pesticide Engineering Research Center,Nankai University,Tianjin 300071)
  • Received:2013-03-22 Revised:2013-07-19 Published:2013-07-19 Online:2013-09-02

摘要: 为阐明燕麦嗜酸菌(Aaa)鞭毛素作为一种病原相关分子模式(PAMP)诱导水稻免疫反应(PTI)的作用机理,采用机械震荡、丙酮沉淀以及离子交换层析进行了蛋白提纯,并用DAB染色法对其诱导水稻产生H2O2的能力进行了测定。结果表明,上述提纯方法的组合使用有效地提纯了分子量约为45kD的鞭毛素,经浸润接种处理后诱导了水稻叶组织 H2O2 的产生。因此,Aaa鞭毛素提纯蛋白可用于后续的水稻 PTI 机理分析。

关键词: 燕麦嗜酸菌, 鞭毛素, 纯化, 生物活性

Abstract: To elucidate the mechanism of PAMP-triggered-immunity(PTI)of rice by bacterial flagellin, a pathogen-associated molecular pattern(PAMP), the isolation and purification of flagellin from Acidovorax avenae sub. avenae(Aaa)strain NB001 and it’s activity in elicitation of H2O2 generation of rice were performed in this study. The results showed that Aaa flagellin(about MW45 kD)was effectively purified by combined using of vortex oscillation, acetone precipitation and anion exchange chromatography. Moreover, the purified flagellin significantly induced H2O2 production in the leaf tissues of 14-day-old rice seedling. Therefore, the purified flagellin from Aaa could be further used for function analysis in PTI of rice.

Key words: Acidovorax avenae sub. avenae, Flagellin, Purification, Biological activity