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Updated: Jun 30, 2025

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在效应器触发免疫期间动态转录基因反应的分解揭示了两种不同的植物细胞群体的保存反应

Xiaotong Liu¹, Daisuke Igarashi², Rachel A Hillmer³

¹Department of Plant and Microbial Biology, University of Minnesota - Twin Cities, St Paul, MN 55108, USA; Department of Computer Science and Engineering, University of Minnesota - Twin Cities, Minneapolis, MN 55455, USA; Bioinformatics and Computational Biology Graduate Program, University of Minnesota - Twin Cities, Minneapolis, MN 55455, USA.

Plant communications

|March 15, 2024

概括

植物的免疫反应在基因表达中显示了一个保存的"回声"模式,从时间过程数据中揭示了空间信息. 这种模式表明,不同的细胞群协调防御病原体,如Pseudomonas syringae.

科学领域:

植物免疫力植物免疫力
分子生物学分子生物学
系统生物学系统生物学

背景情况:

植物对病原体的有效防御需要快速,空间解决的免疫反应.
转录组分析对于了解植物免疫力至关重要,但往往缺乏空间和时间分辨率.
阿拉比多普西斯的效应器触发免疫 (ETI),由Pseudomonas注射器效应器AvrRpt2诱导,为研究植物免疫信号提供了一个模型.

研究的目的:

开发一种方法来从植物免疫中的时间过程转录组数据中提取空间信息.
为了研究效应器触发免疫期间在基因表达中观察到的"回声"模式.
阐明 WRKY 转录因子在协调植物免疫反应中的作用.

主要方法:

在Pseudomonas syringae疫苗接种后,对公共Arabidopsis时间过程转录组数据的重新分析.
实施多分区建模方法来分解双峰基因表达模式.
在效应器触发免疫和模式触发免疫期间对基因组重叠和动力学的分析.

主要成果:

成千上万的上调基因表现出普遍存在的双峰时间流程模式.
一个多隔间模型成功地将双峰模式分解为两个单峰模式,揭示了"回响"现象.
"回声"模式,其中第一个和第二个峰值时间相关,表明来自两个不同的细胞群体的反应.
在细胞群体之间观察到具有不同启动时间的保存转录组反应,即使具有不同类型的诱导体.
一个WRKY网络激活模型解释了不同类型的诱导器引起的类似的转录组反应.

结论:

时间过程中转录组数据的分解可以提取空间信息,识别不同的响应细胞群.
"回声"基因表达模式突出显示了植物中保存但暂时不同的免疫信号机制.
WRKY激活网络为植物免疫反应提供了灵活的框架,适应各种病原体的作用和压力.

关键词:

阿拉比多普西斯 (Arabidopsis) 是一种植物.伪蒙的注射器在WRKY转录因子.多部件模型是多部件模型.植物免疫反应是植物免疫反应.具有弹性的免疫信号网络.

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