Receptor Kinase THESEUS1 Is a Rapid Alkalinization Factor 34 Receptor in Arabidopsis

• Published in: Current biology Vol. 28; no. 15; pp. 2452 - 2458.e4
• Main Authors: Gonneau, Martine, Desprez, Thierry, Martin, Marjolaine, Doblas, Verónica G., Bacete, Laura, Miart, Fabien, Sormani, Rodnay, Hématy, Kian, Renou, Julien, Landrein, Benoit, Murphy, Evan, Van De Cotte, Brigitte, Vernhettes, Samantha, De Smet, Ive, Höfte, Herman
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 06.08.2018; Elsevier
• Subjects: Arabidopsis - genetics; Arabidopsis - growth & development; Arabidopsis - metabolism; Arabidopsis Proteins - genetics; Arabidopsis Proteins - metabolism; Arabidopsis thaliana; cell wall; Cell Wall - metabolism; FERONIA; lateral root initiation; Life Sciences; Peptide Hormones - genetics; Peptide Hormones - metabolism; Plant Roots - genetics; Plant Roots - growth & development; Protein Kinases - genetics; Protein Kinases - metabolism; rapid alkalinization factor; Receptors, Cell Surface - genetics; Receptors, Cell Surface - metabolism; Signal Transduction; Vegetal Biology; lateral root initiation; Arabidopsis thaliana; FERONIA; rapid alkalinization factor; cell wall; Signaling; CrRLK receptor; Rapid alkalinization factor; Lateral root initiation; Cell wall
• ISSN: 0960-9822; 1879-0445
• DOI: 10.1016/j.cub.2018.05.075

The growth of plants, like that of other walled organisms, depends on the ability of the cell wall to yield without losing its integrity. In this context, plant cells can sense the perturbation of their walls and trigger adaptive modifications in cell wall polymer interactions. Catharanthus roseus receptor-like kinase 1-like (CrRLK1L) THESEUS1 (THE1) was previously shown in Arabidopsis to trigger growth inhibition and defense responses upon perturbation of the cell wall, but so far, neither the ligand nor the role of the receptor in normal development was known. Here, we report that THE1 is a receptor for the peptide rapid alkalinization factor (RALF) 34 and that this signaling module has a role in the fine-tuning of lateral root initiation. We also show that RALF34-THE1 signaling depends, at least for some responses, on FERONIA (FER), another RALF receptor involved in a variety of processes, including immune signaling, mechanosensing, and reproduction [1]. Together, the results show that RALF34 and THE1 are part of a signaling network that integrates information on the integrity of the cell wall with the coordination of normal morphogenesis. [Display omitted] •THE1 is a rapid alkalinization factor 34 receptor in Arabidopsis•RALF34-THE1 signaling module fine-tunes lateral root initiation•RALF34-THE1 signaling depends on FER Malectin receptor kinase THE1 is required to monitor wall integrity of growing plant cells. Gonneau et al. now show that THE1 is a receptor for the peptide RALF34 and that RALF34-THE1 signaling is required for the fine-tuning of pericycle divisions during lateral root initiation and, at least partially, dependent on FER, another RALF receptor.