Rapid local and systemic jasmonate signalling drives initiation and establishment of plant systemic immunity

Rapid local and systemic jasmonate signalling drives initiation and establishment of plant systemic immunity
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快速的局部和全身茉莉酸信号传导驱动植物全身免疫的启动和建立

DOI:
10.1101/2023.05.22.541689
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发表时间:
2023
期刊:
--
影响因子:
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通讯作者:
Gaikwad T
Gaikwad T
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作者:
Gaikwad T

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植物抗病蛋白(效应子触发免疫,ETI)成功识别病原体效应子,通过局部过敏反应(HR)抑制入侵病原体。此外,ETI激活建立广谱系统获得性抗性(SAR)的远程信号级联。使用一种新的和敏感的记者,我们已经能够成像的SAR的时空动态。我们表明,本地ETI触发SAR信号的产生,然后快速繁殖和建立在系统响应叶,是依赖于茉莉酸的生物合成和感知。此外,ETI启动钙和茉莉酸盐依赖的全身表面电位,让人想起那些激活的草食动物,但与较慢的传播动力学。因此,茉莉酸信号是至关重要的启动和建立系统的防御反应,对各种各样的植物病原体。
Successful recognition of pathogen effectors by plant disease resistance proteins (effector triggered immunity, ETI) contains the invading pathogen through a localized hypersensitive response (HR). In addition, ETI activates long-range signalling cascades that establish broad spectrum systemic acquired resistance (SAR). Using a novel and sensitive reporter we have been able to image the spatio-temporal dynamics of SAR. We demonstrate that local ETI triggered SAR signal generation, followed by rapid propagation and establishment in systemic responding leaves, is dependent on both jasmonate biosynthesis and perception. Further, ETI initiates calcium- and jasmonate-dependent systemic surface electrical potentials, reminiscent of those activated by herbivory but with slower propagation kinetics. Thus, jasmonate signalling is crucial to the initiation and establishment of systemic defence responses against a diverse range of phytopathogens.
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