一个NAC三元组通过负调节N-基管酸生物合成来调节植物免疫力
Jianghua Cai1,2,3, Sayantan Panda1,4, Yana Kazachkova1
1Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel.
Nature communications
|August 22, 2024
概括
转录因子NAC90通过控制N-基管酸 (NHP) 生物合成来负面调节植物免疫力. 这一发现揭示了一个至关重要的发现.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物免疫力 植物免疫力
- 转录条例 转录条例 转录条例
背景情况:
- N-基管酸 (NHP) 对于植物免疫力至关重要,但其转录调节仍然不太了解.
- 现有的知识主要集中在NHP生物合成上,在理解其途径如何在基因表达水平上受到控制方面存在差距.
研究的目的:
- 调查Arabidopsis. 在NHP途径的转录调节.
- 确定参与控制NHP水平和植物免疫反应的关键转录因子.
主要方法:
- 工程阿拉比多普西斯用于构成性高NHP生产.
- 无标签的蛋白质组学来识别诱导的转录因子.
- 对NAC90.90进行基因淘汰和过度表达研究.
- 对NHP和酸 (SA) 水平的分析.
- 研究NHP和SA生物合成基因的基因表达.
- 蛋白质与蛋白质相互作用的研究.
- 评估植物疾病耐药性和衰老表型.
主要成果:
- 一个NAC类型的转录因子NAC90被确定为强烈诱导和负面调节植物免疫力.
- NAC90淘汰突变体表现出增强的免疫力,更早的衰老,以及增加的NHP/SA水平,而过度表达线路的抵抗力受到损害.
- 与NAC61和NAC36一起,NAC90直接抑制了关键的NHP和SA生物合成基因 (ALD1,FMO1,ICS1).
- 通过控制NHP生物合成,NAC90通过控制NHP生物合成来调节免疫的负面调节.
结论:
- NAC90在NHP监管网络中起到抑制作用,控制NHP生产.
- 一个涉及NAC抑制剂和NHP糖化酶的"气体和制动"转录机制平衡NHP水平,植物生长和防御.
- 这项研究显著扩大了对NHP途径中转录控制及其在植物免疫中的作用的理解.
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