Spontaneously arising channels that transport the phytohormone auxin provide positional cues for self-organizing aspects of plant development such as flexible vasculature regeneration or its patterning during leaf venation. The auxin canalization hypothesis proposes a feedback between auxin signaling and transport as the underlying mechanism, but molecular players await discovery. We identified part of the machinery that routes auxin transport. The auxin-regulated receptor CAMEL (Canalization-related Auxin-regulated Malectin-type RLK) together with CANAR (Canalization-related Receptor-like kinase) interact with and phosphorylate PIN auxin transporters. camel and canar mutants are impaired in PIN1 subcellular trafficking and auxin-mediated PIN polarization, which macroscopically manifests as defects in leaf venation and vasculature regeneration after wounding. The CAMEL-CANAR receptor complex is part of the auxin feedback that coordinates polarization of individual cells during auxin canalization.
We acknowledge M. Glanc and Y. Zhang for providing entryclones; Vienna Biocenter Core Facilities (VBCF) for recombinantprotein production and purification; Vienna Biocenter Massspectrometry Facility, Bioimaging, and Life Science Facilities at IST Austria and Proteomics Core Facility CEITEC for a great assistance.Funding:This project received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (grant agreement 742985) and Austrian Science Fund (FWF): I 3630-B25 to J.F.and by grants from the Austrian Academy of Science through the Gregor Mendel Institute (Y.B.) and the Austrian Agency for International Cooperation in Education and Research (D.D.); the Netherlands Organization for Scientific Research (NWO; VIDI-864.13.001) (W.S.); the Research Foundation–Flanders (FWO;Odysseus II G0D0515N) and a European Research Council grant (ERC; StG TORPEDO; 714055) to B.D.R., B.Y., and E.M.; and the Hertha Firnberg Programme postdoctoral fellowship (T-947) from the FWF Austrian Science Fund to E.S.-L.; J.H. is the recipient of a DOC Fellowship of the Austrian Academy of Sciences at IST Austria.
Hajny J, Prat T, Rydza N, et al. Receptor kinase module targets PIN-dependent auxin transport during canalization. Science. 2020;370(6516):550-557. doi:10.1126/science.aba3178
Hajny, J., Prat, T., Rydza, N., Rodriguez Solovey, L., Tan, S., Verstraeten, I., … Friml, J. (2020). Receptor kinase module targets PIN-dependent auxin transport during canalization. Science. American Association for the Advancement of Science. https://doi.org/10.1126/science.aba3178
Hajny, Jakub, Tomas Prat, N Rydza, Lesia Rodriguez Solovey, Shutang Tan, Inge Verstraeten, David Domjan, et al. “Receptor Kinase Module Targets PIN-Dependent Auxin Transport during Canalization.” Science. American Association for the Advancement of Science, 2020. https://doi.org/10.1126/science.aba3178.
J. Hajny et al., “Receptor kinase module targets PIN-dependent auxin transport during canalization,” Science, vol. 370, no. 6516. American Association for the Advancement of Science, pp. 550–557, 2020.
Hajny J, Prat T, Rydza N, Rodriguez Solovey L, Tan S, Verstraeten I, Domjan D, Mazur E, Smakowska-Luzan E, Smet W, Mor E, Nolf J, Yang B, Grunewald W, Molnar G, Belkhadir Y, De Rybel B, Friml J. 2020. Receptor kinase module targets PIN-dependent auxin transport during canalization. Science. 370(6516), 550–557.
Hajny, Jakub, et al. “Receptor Kinase Module Targets PIN-Dependent Auxin Transport during Canalization.” Science, vol. 370, no. 6516, American Association for the Advancement of Science, 2020, pp. 550–57, doi:10.1126/science.aba3178.
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