阿拉比多普西斯的转录组学揭示了Lipoxygenase2 (AtLOX2) 在伤口诱导反应中的作用
Diljot Kaur1,2, Andreas Schedl3,4,5, Christine Lafleur6
1Department of Plant Science, McGill University, 21,111 rue Lakeshore, Ste-Anne-de-Bellevue, QC H9X 3V9, Canada.
International journal of molecular sciences
|June 19, 2024
概括
脂氧酶 (LOX) 调解了植物的防御. 阿拉比多普西斯塔利亚纳中的AtLOX2酶对受伤诱导的莉花酸反应和毛虫耐药性至关重要,影响酸水平和基因表达.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物防御机制 植物防御机制
- 植物激素信号传递
背景情况:
- 在Arabidopsis thaliana中,有四种13S-脂氧酶 (AtLOX2,AtLOX3,AtLOX4,AtLOX6) 在受伤时导致莉花酸爆发.
- 亚特洛克斯2在植物抵抗毛毛虫食草的过程中起着重要作用.
研究的目的:
- 研究AtLOX2在植物激素和转录对Arabidopsis thaliana机械损伤的反应中的作用.
- 为了比较野生类型 (WT) 和lox2突变植物的伤口诱导反应.
主要方法:
- 野生类型和2突变植物Arabidopsis thaliana的比较分析.
- 测量植物激素水平 (盐酸,雅斯蒙酸).
- 在受伤后的不同时间点对受伤反应基因的转录概况.
主要成果:
- 与WT相比,lox2突变体表现出更高的构成性酸 (SA) 水平和增强的SA-响应基因表达.
- 伤害诱导了低温的莉花在2植物中的爆发.
- 在WT和lox2突变之间观察到参与斯酸生物合成,信号衰减和酸反应的基因的差异调节.
- 在受伤12小时后,WT植物表现出昆虫抵抗基因的强烈表达.
结论:
- AtLOX2参与SA生物合成的对抗作用,很可能是通过斯酸盐的产生.
- 在机械损伤后,AtLOX2显著影响了对斯酸盐敏感基因表达的动态调节.
- AtLOX2有助于植物防御通路,增强对昆虫草食的抵抗力.
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