Importers Drive Leaf-to-Leaf Jasmonic Acid Transmission in Wound-Induced Systemic Immunity
Importers Drive Leaf-to-Leaf Jasmonic Acid Transmission in Wound-Induced Systemic Immunity
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DOI：
10.1016/j.molp.2020.08.017
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发表时间：
2020-10-05
期刊：
影响因子：
27.5
通讯作者：
Liu, Pei
中科院分区：
文献类型：
--
作者：
Li, Mengya;Wang, Feifei;Liu, Pei
移动伤口信号沿着韧皮部途径的传输对于伤口诱导的全身反应/抵抗的激活至关重要，这需要远端未受损叶子中茉莉酸（JA）的激增。在这些移动信号中，由几种 Glade 3 谷氨酸受体样 (GLR3) 蛋白的谷氨酸依赖性激活介导的电信号参与刺激远端叶片中 JA 的产生。然而，JA 是否充当移动伤口信号，如果是，它如何传输并与电信号相互作用仍不清楚。在这里，我们发现 JA 在拟南芥中从局部叶转移到远端叶，并且该过程主要由两个韧皮部表达和质膜定位的茉莉酸转运蛋白 AtJAT3 和 AtJAT4 调节。除了 AtJAT3/4 和 GLR3.3 在调节长距离 JA 易位方面的合作外，我们的研究结果表明，输入介导的细胞间 JA 转运对于以自我繁殖的方式驱动韧皮部途径中 JA 的装载和易位非常重要。
The transmission of mobile wound signals along the phloem pathway is essential to the activation of wound-induced systemic response/resistance, which requires an upsurge of jasmonic acid (JA) in the distal undamaged leaves. Among these mobile signals, the electrical signal mediated by the glutamate-dependent activation of several Glade three GLUTAMATE RECEPTOR-LIKE (GLR3) proteins is involved in the stimulation of JA production in distal leaves. However, whether JA acts as a mobile wound signal and, if so, how it is transmitted and interacts with the electrical signal remain unclear. Here, we show that JA was translocated from the local to distal leaves in Arabidopsis, and this process was predominantly regulated by two phloem-expressed and plasma membrane-localized jasmonate transporters, AtJAT3 and AtJAT4. In addition to the cooperation between AtJAT3/4 and GLR3.3 in the regulation of long-distance JA translocation, our findings indicate that importer-mediated cell-cell JA transport is important for driving the loading and translocation of JA in the phloem pathway in a self-propagating manner.