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. 2022 Feb 15;17(1):2034270. doi: 10.1080/15592324.2022.2034270

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© 2022 The Author(s). Published with license by Taylor & Francis Group, LLC.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 7. — A proposed model of the Pep1-induced callose and lignin deposition in root. Pep1 and Pep2 are perceived by PEPR2 and transduce a signaling through BAK1/SERK4 and BIK1/PBL1, which leads to cytosolic Ca²⁺ increase and RBOHD/F-mediated ROS production. Ca²⁺ and ROS signals mediate the deposition of callose and lignin in roots. JA-COI1-MYC2/3/4 and ET-EIN2-EIN3/EIL1 signaling pathways oppositely regulate Pep1-induced ROS production and ROS-mediated callose lignin deposition. JA-COI1-MYC2/3/4-ROS may contribute to the expression of Pep and PEPR2 through a positive feedback regulation.