咖啡酸O-甲基转移酶依赖的黄类防御系统促进木对秋季军虫侵袭的抵抗力
Pritha Kundu1, Sanket Shinde1, Sajjan Grover1
1Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583, USA.
Plant physiology
|February 19, 2025
概括
布朗中肋12 (Bmr12) 基因,编码咖啡酸O-甲基转移酶 (COMT),增强了对秋季军虫 (FAW) 的石榴防御能力. 过度表达Bmr12通过促进黄酸积累和激活斯酸通路来增强抵抗力.
科学领域:
- 植物科学 植物科学
- 昆虫学 昆虫学是一门学科.
- 生物化学 生物化学
背景情况:
- (Sorghum bicolor) 是一种重要的单种作物,容易受到秋季军虫 (FAW;Spodoptera frugiperda) 的重大产量损失.
- 棕色中肋12 (Bmr12) 基因,编码咖啡酸O-甲基转移酶 (COMT),涉及到植物的防御机制.
研究的目的:
- 调查Bmr12基因及其编码的COMT酶在果对秋季军虫 (FAW) 感染的防御中的作用.
- 阐明分子途径,包括植物激素和氧化应激,参与COMT介导的耐药性.
主要方法:
- 在野生型,Bmr12突变型和Bmr12过度表达 (OE) 的小麦植物中对FAW敏感性的比较分析.
- 植物激素分析和转录组分析以确定与防御相关的途径.
- 对FAW养和口腔分泌物反应中的红素和黄类积累的评估.
主要成果:
- 失去Bmr12功能增加了对FAW的敏感性,而Bmr12-OE植物表现出更强的抗性.
- 在Bmr12-OE植物中,FAW感染诱导了黄类积累,对FAW的生长和生存产生了负面影响.
- 通过COMT介导的耐药性与莉酸 (JA) 信号传递和氧化应激通路有关,COMT在感知FAW口腔线索方面发挥作用.
结论:
- Bmr12基因及其COMT酶对于黄对FAW的防御至关重要.
- 通过COMT介导的抵抗涉及JA,过氧化和黄积累的相互作用,这对于安装强大的宿主防御至关重要.
- 了解这一机制可以为开发耐FAW的种类的策略提供信息.
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