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. 2015 Nov 3;6:952. doi: 10.3389/fpls.2015.00952

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Copyright © 2015 Chen, Li, Tan, Chen, Xiao, Ma, Gao, Zerbe, Chen and Zhang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Model of MeJA signal transduction in plants. MeJA promotes the interaction of COI1 and SCF, leading to their degradation. In the first wave, these events induce the expression of a set of early responsive TFs that exert positive (MYC2) or negative (SZT/ZAT10, AZF2) control on JA biosynthesis. Some TFs, such as RAV1 directly interact with secondary metabolic genes. In second wave, the MeJA-mediated signaling cascade leads to transcriptional reprogramming of cellular metabolism toward increased phenylpropanoid and lignan biosynthesis and accumulation. In addition to RAV1 and ORA47, AP2/ERFs found in this study that might participate in the biosynthesis of lignans or generally phenylpropanoid metabolism are highlighted in red. Moreover, physical interactions (dotted lines), direct transcriptional regulation (solid lines), and incompletely characterized metabolic or signaling pathways (dashed lines) are highlighted.