转录和代谢学揭示了OsCOI2作为大米根中的斯蒙酸盐受体主开关
Mohamad Cheaib1, Hieu Trang Nguyen1, Marie Couderc1
1DIADE, IRD, University Montpellier, Montpellier, France.
PloS one
|October 28, 2024
概括
米OsCOI2是莉花酸信号传递的关键调节剂,驱动根部广泛的转录变化,影响植物发育和应激反应. 它将新陈代谢转向二次化合物,影响增长-防御权衡.
科学领域:
- 植物生物学 植物生物学
- 分子植物科学 分子植物科学
- 激素信号传递 激素信号传递
背景情况:
- 松酸植物激素调节植物的发育和应激反应.
- 冠状腺不敏感 (COI) 受体会感知斯蒙酸,准斯蒙酸-ZIM域 (JAZ) 抑制剂进行降解.
- 米具有三个OsCOI基因:OsCOI1a,OsCOI1b和OsCOI2,OsCOI1a/b在防御和衰老中的作用已知,但OsCOI2的功能最近正在出现.
研究的目的:
- 阐明OsCOI2在莉花的信号通路中的特定作用.
- 为了比较转录和代谢反应的米线突变在OsCOI1a/b对比OsCOI2在贾斯蒙酸治疗后.
主要方法:
- 转录基因分析使用RNA-seq对莉花盐处理的米突变体 (oscoi1ab和oscoi2) 的分析.
- 代谢分析,以评估对莉花糖信号的反应中的代谢变化.
- 识别由OsCOI2.2调节的转录因子和基因.
主要成果:
- OsCOI2被确定为在莉花酸治疗后在米根中转录重编程的主要调节器.
- OsCOI2依赖基因参与根部发育,应激反应,细胞生长和二次代谢物生物合成 (烯胺,二烯植物素).
- 虽然存在功能冗余,但oscoi2突变者表现出比oscoi1ab突变者更弱的反应,OsCOI2控制了从初级代谢转变为二级代谢,包括色素积累.
结论:
- OsCOI2在莉花的信号传递中起着关键作用,特别是在根反应中.
- OsCOI2 影响关键转录因子和代谢途径的表达,包括二次代谢产物.
- 这项研究表明,OsCOI2对于调解大米的增长-防御权衡至关重要.
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