Sun Chao, Wei JinBo, Gu XinYun, Wu MinLiang, Li Meng, Liu YiXi, An NingKai, Wu KeMeng, Wu ShaSha, Wu JunQing, Xu MeiZhi, Wu JiaChen, Wang YaLing, Chao DaiYin, Zhang YouJun, Wu Shuang
College of Life Sciences, College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Shanghai 200032, China.
Plant Cell. 2024 Oct 15;36(12):4952-69. doi: 10.1093/plcell/koae269.
Herbivore-induced wounding can elicit a defense response in plants. However, whether plants possess a surveillance system capable of detecting herbivore threats and initiating preparatory defenses before wounding occurs remains unclear. In this study, we reveal that tomato (Solanum lycopersicum) trichomes can detect and respond to the mechanical stimuli generated by herbivores. Mechanical stimuli are preferentially perceived by long trichomes, and this mechanosensation is transduced via intra-trichome communication. This communication presumably involves calcium waves, and the transduced signals activate the jasmonic acid (JA) signaling pathway in short glandular trichomes, resulting in the upregulation of the Woolly (Wo)-SlMYC1 regulatory module for terpene biosynthesis. This induced defense mechanism provides plants with an early warning system against the threat of herbivore invasion. Our findings represent a perspective on the role of multicellular trichomes in plant defense and the underlying intra-trichome communication.
食草动物造成的伤口会引发植物的防御反应。然而，植物是否拥有一个能够检测食草动物威胁并在伤口出现之前启动预备防御的监测系统仍不清楚。在本研究中，我们发现番茄（Solanum lycopersicum）的毛状体能够检测并响应食草动物产生的机械刺激。长的毛状体优先感知机械刺激，这种机械感觉通过毛状体内的通讯进行传导。这种通讯可能涉及钙波，转导的信号激活短腺毛中的茉莉酸（JA）信号通路，导致用于萜类生物合成的Woolly（Wo）-SlMYC1调控模块上调。这种诱导防御机制为植物提供了一个针对食草动物入侵威胁的预警系统。我们的发现代表了对多细胞毛状体在植物防御中的作用以及潜在的毛状体内通讯的一种观点。
