由当地草本象牙坐标触发的贾斯蒙酸媒介系统信号 在番茄 (Solanum lycopersicum L.) 中的系统性胃关闭
Yibin Lin1,2,3, Lu Tong1,2, Xiaomin Song3
1State Key Laboratory of Agricultural and Forestry Biosecurity, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, China.
Plant, cell & environment
|January 23, 2026
概括
在番茄植物中,昆虫草食会触发系统性口腔关闭. 这种反应依赖于局部的素酸 (JA) 生物合成和JA介导的过氧化 (H2O2) 在系统性护卫细胞中爆发.
科学领域:
- 植物科学 植物科学
- 植物生理学 植物生理学
- 植物与昆虫的相互作用
背景情况:
- 植物表现出对昆虫草食的快速防御反应,包括系统性口腔关闭.
- 在草食诱导的全身口腔关闭背后的精确分子机制仍然不完全理解.
研究的目的:
- 为了阐明在模拟昆虫草食之后,番茄植物系统性口腔关闭的机制.
- 调查素氧化物 (H2O2) 和酸 (JA) 在这种反应中的作用.
主要方法:
- 模拟的草食 (伤口 + 口腔分泌物) 应用于当地的番茄传单.
- 胃管导电性被测量在系统性小册子中.
- 分析了JA生物合成,JA积累和H2O2爆发的基因表达.
- 进行了突变分析 (spr2,spr8) 和移植实验.
主要成果:
- 模拟的草食导致系统口腔导电率显著下降 (> 45%).
- 当地斯蒙酸 (JA) 生物合成和系统JA积累是由草食诱导的.
- 在JA缺陷突变体中,系统性口腔关闭受损.
- 系统性护卫细胞中JA介导的过氧化 (H2O2) 爆发对反应至关重要.
结论:
- 由草食引发的局部JA生物合成对于系统性口腔关闭至关重要.
- 护卫细胞中的系统JA介导的H2O2爆发在这种植物防御机制中起着至关重要的作用.
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