植物免疫受体表达的自然变异调解了诱导器敏感性的媒介
Brian Behnken1, Wesley George1,2, Antonio F Chaparro1,3
1Department of Biology, University of Washington. Seattle, WA, USA.
bioRxiv : the preprint server for biology
|September 15, 2025
概括
植物受体表达水平,而不是序列,影响害虫防御反应. 素受体 (INR) 表达的自然变化会影响植物免疫力,但不会改变草食动物的抗性.
科学领域:
- 植物免疫力 植物免疫力
- 分子植物病原体相互作用
- 遗传学和基因组学 遗传学和基因组学
背景情况:
- 植物免疫系统利用模式识别受体 (PRRs) 来检测病原体/害虫相关的分子模式 (PAMPs).
- PRRs的转录调节至关重要,但人们对其了解甚少.
- 在豆类植物中,Inceptin受体 (INR) 识别了In11,以防御毛虫害虫.
研究的目的:
- 研究常见豆 (Phaseolus vulgaris) 中In11不敏感性的遗传基础.
- 确定转录调节在INR介导植物免疫中的作用.
- 分析INR表达水平与植物防御反应之间的关系.
主要方法:
- 在Phaseolus vulgaris陆地品种中分析了Inceptin受体 (INR) 表达的自然变异.
- 利用近同位素线 (NILs) 来研究促进体变异的影响.
- 采用异质表达系统 (Nicotiana benthamiana) 来评估cis元素的功能.
- 评估了植物对甜菜军 (Spodoptera exigua) 和In11诱导的保护的耐药性.
主要成果:
- In11响应的表型变化与INR表达水平相关,而不是编码序列变化.
- 在Phaseolus vulgaris加入和NILs中促进物序列的变化影响了INR表达和In11诱导的乙烯反应.
- 在INR促进体中cis元素的变化导致异质系统中的不同叶表达水平.
- 具有不同INR表达水平的NILs在草食动物耐药性或In11预处理保护方面没有显著差异.
结论:
- 在PRR表达水平的自然变化可以调节PAMP反应.
- 不同的INR表达影响植物防御信号通路.
- 尽管在PAMP感知中存在差异,但可以保持有效的下游耐药性表型.
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