侵袭前和后的防御系统都促进了阿拉比多普西斯的非宿主抵抗力
Volker Lipka1, Jan Dittgen, Pawel Bednarek
1Department of Plant Microbe Interactions, Max Planck Institute for Plant Breeding Research, Carl von Linné Weg 10, D-50829 Köln, Germany.
阿拉比多普西斯PEN2蛋白质防止病原体进入,作为入侵前的防御. 结合后入侵免疫,它保护植物免受不适应的真菌,预防疾病.
科学领域:
- 植物病理学 植物病理学
- 分子生物学分子生物学
- 植物免疫力 植物免疫力
背景情况:
- 非宿主耐药性是植物对非适应性病原体的免疫力.
- 了解非宿主耐药机制对于作物保护至关重要.
研究的目的:
- 为了调查Arabidopsis PEN2在对特定粉状菌的非宿主耐药性中的作用.
- 阐明入侵前和后的抵抗机制之间的相互作用.
主要方法:
- 研究了PEN2的局部化和功能,一种糖酸酸酶.
- 分析了EDS1-PAD4-SAG101信号复合体在侵袭后抗性的参与.
- 在抵抗层的综合损害时评估了Arabidopsis的敏感性.
主要成果:
- 阿拉比多普西斯PEN2限制病原体的进入,在可诱导的入侵前抵抗中起作用.
- 侵袭后的真菌生长受到EDS1-PAD4-SAG101复合体的阻断.
- 两个抵抗层的同时失效使Arabidopsis易受不适应的真菌的影响.
结论:
- PEN2 作为阿拉比多普西斯非宿主耐药性的重要前入侵防御组件.
- 涉及入侵前和后机制的多层防御策略对于植物免疫是必不可少的.
- 破坏两层都会损害植物的防御能力,导致宿主易感.
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