Endogenous salicylic acid suppresses de novo root regeneration from leaf explants

• DOI: 10.1371/journal.pgen.1010636
• Publication Date: 2023-03-01T18:35:56Z
• Authors: Sorrel Tran; Madalene Ison; Nathália Cássia F...; Maria Andrea Ortega; Yun-Fan Stephanie...; Alan Peper; Lanxi Hu; Dawei Xu; Khadijeh Mozaffari; Paul M. Severns; Yao Yao; Chung-Jui Tsai; Paulo José Pereir...; Li Yang
• Keywords: Organogenesis

Plants can regenerate new organs from damaged or detached tissues. In the process of de novo root regeneration (DNRR), adventitious roots are frequently formed wound site on a leaf. Salicylic acid (SA) is key phytohormone regulating plant defenses and stress responses. The role SA its acting mechanisms during organogenesis still unclear. Here, we found that endogenous inhibited formation after cutting. Free rapidly accumulated at site, which was accompanied by an activation response. receptors NPR3 NPR4, but not NPR1, were required for DNRR. Wounding-elevated compromised expression AUX1, subsequent transport auxin to site. A mutation in AUX1 abolished enhanced DNRR low mutants. Our work elucidates suggests potential link between biotic tissue regeneration.