4.8 Article

Receptor kinase module targets PIN-dependent auxin transport during canalization

期刊

SCIENCE
卷 370, 期 6516, 页码 550-+

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AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aba3178

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资金

  1. European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program [742985]
  2. Austrian Science Fund (FWF) [I 3630-B25]
  3. Austrian Academy of Science through the Gregor Mendel Institute
  4. Austrian Agency for International Cooperation in Education and Research
  5. Netherlands Organization for Scientific Research (NWO) [VIDI864.13.001]
  6. Research Foundation-Flanders (FWO) [Odysseus II G0D0515N]
  7. European Research Council (ERC) [714055]
  8. Hertha Firnberg Programme postdoctoral fellowship from the FWF Austrian Science Fund [T-947]
  9. Austrian Academy of Sciences at IST Austria
  10. European Research Council (ERC) [714055] Funding Source: European Research Council (ERC)

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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.

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