拉扎鲁斯1作为植物免疫和系统性获得性耐药性的积极调节者
Yue Chen1,2, Yue Han1,2, Weijie Huang3
1Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, China.
Frontiers in plant science
|December 5, 2024
概括
研究人员发现,LAZARUS 1 (LAZ1) 和LAZ1H1是植物系统性获得性抵抗 (SAR) 的关键积极调节者. 这些蛋白质通过控制参与SAR信号通路和病原体防御的关键基因来增强植物免疫力.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物病理学 植物病理学
- 植物免疫力 植物免疫力
背景情况:
- 系统性获得性抵抗 (SAR) 是由局部感染激活的关键植物防御机制,为随后的病原体攻击提供广泛的耐药性.
- 酸 (SA) 和N-hydroxypipecolic acid (NHP) 是SAR中的关键信号分子,它们的水平在SAR激活过程中增加.
- 卡尔莫杜林结合蛋白60 (CBP60) 转录因子,特别是CBP60g和SARD1,是植物免疫的主要调节者,控制SA和NHP生物合成基因的表达,但它们的精确病原体反应机制尚不清楚.
研究的目的:
- 确定和描述植物免疫和系统性获得性抵抗 (SAR) 的新型调节剂.
- 阐明SARD1和CBP60g对病原体感染的反应的具体机制.
- 研究LAZARUS 1 (LAZ1) 和其同类LAZ1H1在植物免疫反应中的作用.
主要方法:
- 使用sard1-1突变背景进行了前进基因选,以识别具有受损SAR表型的突变者,从而将sard6-1分离出来.
- 对sard6-1突变的遗传映射将其识别在LAZ1基因中.
- 对LAZ1和LAZ1H1在调节SAR和与防御有关的基因中的表达分析和功能特征,包括CBP60g,SARD1和SA/NHP生物合成基因.
主要成果:
- 通过基因选识别的sard6-1突变,映射到LAZ1基因,揭示了LAZ1及其同类LAZ1H1作为SAR的积极调节者.
- LAZ1和LAZ1H1通过控制CBP60g,SARD1和SA和NHP的生物合成基因的表达来积极调节SAR.
- 过度表达LAZ1,LAZ1H1及其在Nicotiana benthamiana和土豆中的同类物增强了对Phytophthora病原体的抵抗力,证明了它们在植物免疫力中的保留作用.
结论:
- LAZARUS 1 (LAZ1) 和LAZ1H1是系统性获得性抵抗 (SAR) 的关键积极调节者,在植物免疫力中发挥着重要作用.
- 这些蛋白质在SARD1和CBP60g等关键调节剂的上游或并行作用,调节关键防御信号分子 (SA和NHP) 的表达.
- LAZ1和LAZ1H1代表了植物防御通路的进化保守成分,为增强作物对病原体的耐药性提供了潜在的目标.
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