Mechanosensory trichome cells evoke a mechanical stimuli-induced immune response in Arabidopsis thaliana.
Mechanosensory trichome cells evoke a mechanical stimuli-induced immune response in Arabidopsis thaliana.
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DOI：
10.1038/s41467-022-28813-8
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发表时间：
2022-03-08
影响因子：
16.6
通讯作者：
Tada Y
中科院分区：
文献类型：
--
作者：
Matsumura M;Nomoto M;Itaya T;Aratani Y;Iwamoto M;Matsuura T;Hayashi Y;Mori T;Skelly MJ;Yamamoto YY;Kinoshita T;Mori IC;Suzuki T;Betsuyaku S;Spoel SH;Toyota M;Tada Y
宿主受体对病原体配体的识别是真核生物天然免疫的关键策略。在植物中，这是补充的感染时间的昼夜节律的预期，促进即使在没有病原体威胁的基础抗性。在这里，我们报告说，毛状体，表皮上的毛发状结构，直接感知外部机械力，包括雨滴，以预测病原体感染拟南芥。叶表面暴露于机械刺激启动同心传播的细胞间钙波远离毛状体诱导防御相关基因。通过钙调蛋白结合转运激活因子3（CAMTA 3）和丝裂原活化蛋白激酶，增强钙波能够有效免疫病原微生物。我们提出了植物免疫的早期层，其中毛状体作为机械感觉细胞，检测潜在的风险。植物免疫可以由病原体信号或环境信号诱导。在这里，作者表明，植物叶片使用毛状体来感知进入的雨滴，并触发基础防御反应，以防止随后的微生物感染。
Perception of pathogen-derived ligands by corresponding host receptors is a pivotal strategy in eukaryotic innate immunity. In plants, this is complemented by circadian anticipation of infection timing, promoting basal resistance even in the absence of pathogen threat. Here, we report that trichomes, hair-like structures on the epidermis, directly sense external mechanical forces, including raindrops, to anticipate pathogen infections in Arabidopsis thaliana. Exposure of leaf surfaces to mechanical stimuli initiates the concentric propagation of intercellular calcium waves away from trichomes to induce defence-related genes. Propagating calcium waves enable effective immunity against pathogenic microbes through the CALMODULIN-BINDING TRANSCRIPTION ACTIVATOR 3 (CAMTA3) and mitogen-activated protein kinases. We propose an early layer of plant immunity in which trichomes function as mechanosensory cells that detect potential risks. Plant immunity can be induced by pathogen signals or environmental cues. Here, the authors show that plant leaves use trichomes to sense incoming raindrops and trigger basal defence responses to protect against subsequent microbial infection.
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CAO, H;BOWLING, SA;DONG, XN
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