热应激重新编程了土豆植物中草食诱导的防御反应
Jian Zhong1,2, Jinyi Zhang1, Yadong Zhang1
1State Key Laboratory of Rice Biology and Breeding, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insect Pests, Institute of Insect Sciences, Zhejiang University, Hangzhou, 310058, China.
BMC plant biology
|July 16, 2024
概括
高温会通过破坏防御信号通路来削弱植物对昆虫食草的防御能力. 这种对植物反应的重编程使它们更容易受到诸如土豆蝶之类的害虫的攻击.
科学领域:
- 植物生物学 植物生物学
- 生态生态学 生态生态学
- 气候变化研究研究 气候变化研究
背景情况:
- 气候变化正在增加像热浪这样的极端天气事件.
- 高温可以直接影响草食动物的生长.
- 温度对植物对草食动物的防御系统的间接影响尚不清楚.
研究的目的:
- 为了研究短暂的高温如何影响植物在转录和代谢层面对草食的防御.
- 了解温度对植物-草食动物相互作用的影响.
- 阐明斯酸盐在温度介导的植物防御中的信号传递作用.
主要方法:
- 研究了土豆植物 (Solanum tuberosum) 和土豆蝶幼虫 (Phthorimaea operculella) 在不同温度条件下的相互作用.
- 分析了对草食动物和高温的反应中的转录组模式和代谢变化.
- 利用基因改造的土豆植物与改变的莉花含量 (irAOC和irCYP94B3s) 来评估莉花信号的作用.
主要成果:
- 与单独的草食相比,土豆蝶幼虫在暴露于高温和草食的植物上生长更重.
- 高温改变了转录学模式,从"沙钟"到"花瓶"模式,抑制了早期/晚期的防御基因表达,并加速了中间反应.
- 高温损害了斯酸盐和防御化合物的诱导,并抑制了斯酸盐信号介导的植物防御.
结论:
- 短暂的高温会重新编程植物对草食动物的防御.
- 温度压力损害了植物的防御机制,特别是那些由莉花酸中介的信号传递机制.
- 这些发现突出了气候变化,植物生理学和植物-食草动物相互作用之间的复杂相互作用.
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