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 clade 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.

沿韧皮部路径移动伤口信号的传输对于激活伤口诱导的全身反应/抵抗至关重要，这需要远端未受损叶片中茉莉酸（JA）升高。在这些移动信号中，由几种进化枝的三种谷氨酸受体样蛋白（GLR3）的谷氨酸依赖性激活介导的电信号参与了远端叶片JA产生的刺激。但是，尚不清楚JA是否充当移动伤口信号，如果是的话，如何传输以及如何与电信号相互作用。在这里，我们显示JA在拟南芥中从局部叶向远侧叶转移，并且此过程主要受两个韧皮部表达和质膜定位的茉莉酸酯转运蛋白AtJAT3和AtJAT4调控。除了AtJAT3 / 4和GLR3.3在长距离JA转运调控方面的合作外，我们的研究结果还表明，进口商介导的细胞间JA转运对于驱动JA在韧皮部途径中的装载和转运非常重要。一种自我传播的方式。