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

Current biology : CB (2018-07-31)
Martine Gonneau, Thierry Desprez, Marjolaine Martin, Verónica G Doblas, Laura Bacete, Fabien Miart, Rodnay Sormani, Kian Hématy, Julien Renou, Benoit Landrein, Evan Murphy, Brigitte Van De Cotte, Samantha Vernhettes, Ive De Smet, Herman Höfte

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.

Product Number
Product Description

D-Luciferin, synthetic
Anti-Rabbit IgG (whole molecule)–Peroxidase antibody produced in goat, affinity isolated antibody
Fluorescein isothiocyanate–dextran, average mol wt 10,000
Phytagel, suitable for plant cell culture, BioReagent, powder
Isoxaben, PESTANAL®, analytical standard