反应性氧中间体在建立植物免疫力时调解系统信号网络
M E Alvarez1, R I Pennell, P J Meijer
1Plant Biology Laboratory, The Salk Institute, La Jolla, California 92037, USA.
Cell
|April 7, 1998
概括
反应性氧中间体 (ROI) 触发局部植物防御和全身免疫. 这项研究揭示了ROI介导着对病原体的局部和全身耐药性的重复信号传递.
科学领域:
- 植物病理学 植物病理学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 植物的免疫反应包括活性氧介质 (ROI) 的氧化突发.
- 局部过敏反应 (HR) 赋予了对病原体的耐药性.
- 系统性获得性耐药性 (SAR) 提供广泛的免疫.
研究的目的:
- 调查ROI在全身免疫中的作用.
- 为了确定ROI是否会在最初的感染部位之外传递信号.
主要方法:
- 接种阿拉比多普西斯的病毒性Pseudomonas注射器.
- 监测氧化突发和微型过敏反应 (micro-HRs).
主要成果:
- 毒性病原体的注射诱导了远处的阿拉比多普西斯组织中的二次氧化突发.
- 这些次要爆发导致了全身微型HRs.
- 主要和次要的ROI爆发对于发展系统免疫力至关重要.
结论:
- 在植物防御中,ROI作为关键的信号分子起作用.
- 一个重复的ROI信号网络是植物本地和系统性耐药性的基础.
- 这种机制增强了植物对病原体的免疫力.
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