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过氧体动态决定了来自宿主的ROS积累和大米爆发真菌的传染性生长

Jun Zhang^1,2, Huimin Li^1,2, Wangliu Gu^1,2

¹Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing, China.

|November 15, 2023

概括

由MoKat2驱动的真菌过氧体延长,在爆感染期间影响宿主反应性氧物种 (ROS) 水平. 这一过程有助于真菌通过调节ROS平衡来逃避植物防御.

科学领域:

植物病理学植物病理学
分子生物学分子生物学
菌类学菌类学是指菌类学.

背景情况:

植物免疫依赖于天生的防御机制来防止病原体感染.
反应性氧物种 (ROS) 是宿主细胞生成的关键分子,以限制病原体的传播.
大米爆发真菌Magnaporthe oryzae对米种植构成重大威胁.

研究的目的:

为了研究真菌氧体动态在宿主ROS恒温中在*Magnaporthe oryzae*感染期间的作用.
为了确定在对宿主免疫反应中调节过氧体动态的真菌因素.
阐明真菌过氧体对ROS积累和病原体毒性的影响机制.

主要方法:

显微镜技术观察真菌与宿主相互作用中的过氧体动态.
生物化学分析测量宿主植物细胞中的ROS水平.
对真菌进行基因操纵,以研究特定基因的功能,包括MoKat2.
蛋白质与蛋白质相互作用和局部化的分析.

主要成果:

的过氧体延长与宿主ROS积累和病原体感染性有关.
一种过氧体酶MoKat2 (3-ketoacyl-CoA thiolase) 被确定为在感染期间对过氧体延长至关重要.
来自宿主的ROS触发了MoKat2二次体的解离,促进过氧体膜结合和延长.
这种真菌反应抑制了宿主ROS的积累,促进了成功感染.

结论:

类过氧体的动态与ROS介导的宿主免疫密切相关.
MoKat2在通过过氧体延长调节宿主ROS水平方面发挥着关键作用.
这项研究揭示了一种新的病原体与宿主相互作用机制,涉及真菌细胞器官动态和宿主防御逃避.
这些发现有助于我们更好地了解植物和真菌相互作用以及宿主免疫力.

关键词:

M. oryzae与大米的相互作用这就是MoKat2Kat的意义.主机衍生ROS的宿主衍生ROS.传染性生长的感染性生长.过氧酶体的动力学

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