在免疫代谢中JAZ-MYC信号功能的多样化
Leah Y D Johnson1,2,3, Ian T Major1, Yani Chen1
1MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, MI, 48824, USA.
The New phytologist
|July 5, 2023
概括
斯酸盐 (JA) 信号通过控制防御化合物来调节植物免疫力. 特定的MYC和JAZ基因版本微调对病原体和环境压力的反应.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 石 (JA) 信号对于植物防御各种环境威胁至关重要.
- JA信号包括JASMONATE ZIM-DOMAIN (JAZ) 抑制剂的降解,激活MYC转录因子.
- 通过MYC和JAZ基因家族扩张来实现JA反应的功能多样化尚未完全理解.
研究的目的:
- 研究MYC和JAZ基因对应物在调节来自芳香氨基酸 (AAA) 的防御化合物的作用.
- 确定特定的MYC和JAZ基因,参与控制托代谢和JA诱导的免疫力.
主要方法:
- 对Arabidopsis thaliana的功能丧失和主导菌株突变的分析.
- 前进基因选使用随机的JAZ多变异体来识别增强的托生物合成.
- 在JAZ突变体中防御化合物积累和基因表达的表征.
主要成果:
- 确定MYC3和MYC4是JA诱导的托芬代谢的关键调节者.
- 缺乏JAZ组I成员的突变者 (JAZ1/2/5/6) 显示了AAA衍生防御化合物的过度积累.
- 这些JAZ突变体构成性地表达了JA-乙烯免疫标记基因,并表现出对死菌病原体的增强抵抗力.
结论:
- 特定的JAZ和MYC对应物调节氨基酸衍生防御化合物的产生.
- 这些发现提供了关于JA信号在植物免疫中的特异性的见解.
- 这项研究强调了基因家族扩张在多样化植物防御反应中的作用.
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