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Polar recruitment of RLD by LAZY1-like protein during gravity signaling in root branch angle control

Author

Listed:
  • Masahiko Furutani

    (Fujian Agriculture and Forestry University
    Fujian Agriculture and Forestry University
    Nagoya University)

  • Yoshinori Hirano

    (Nara Institute of Science and Technology
    The University of Tokyo)

  • Takeshi Nishimura

    (National Institute for Basic Biology)

  • Moritaka Nakamura

    (National Institute for Basic Biology)

  • Masatoshi Taniguchi

    (Nagoya University)

  • Kanako Suzuki

    (Nagoya University)

  • Ryuichiro Oshida

    (Nagoya University)

  • Chiemi Kondo

    (Nagoya University)

  • Song Sun

    (Fujian Agriculture and Forestry University
    Fujian Agriculture and Forestry University)

  • Kagayaki Kato

    (National Institute for Basic Biology
    National Institute of Natural Sciences)

  • Yoichiro Fukao

    (Ritsumeikan University)

  • Toshio Hakoshima

    (Nara Institute of Science and Technology)

  • Miyo Terao Morita

    (National Institute for Basic Biology)

Abstract

In many plant species, roots maintain specific growth angles relative to the direction of gravity, known as gravitropic set point angles (GSAs). These contribute to the efficient acquisition of water and nutrients. AtLAZY1/LAZY1-LIKE (LZY) genes are involved in GSA control by regulating auxin flow toward the direction of gravity in Arabidopsis. Here, we demonstrate that RCC1-like domain (RLD) proteins, identified as LZY interactors, are essential regulators of polar auxin transport. We show that interaction of the CCL domain of LZY with the BRX domain of RLD is important for the recruitment of RLD from the cytoplasm to the plasma membrane by LZY. A structural analysis reveals the mode of the interaction as an intermolecular β-sheet in addition to the structure of the BRX domain. Our results offer a molecular framework in which gravity signal first emerges as polarized LZY3 localization in gravity-sensing cells, followed by polar RLD1 localization and PIN3 relocalization to modulate auxin flow.

Suggested Citation

  • Masahiko Furutani & Yoshinori Hirano & Takeshi Nishimura & Moritaka Nakamura & Masatoshi Taniguchi & Kanako Suzuki & Ryuichiro Oshida & Chiemi Kondo & Song Sun & Kagayaki Kato & Yoichiro Fukao & Toshi, 2020. "Polar recruitment of RLD by LAZY1-like protein during gravity signaling in root branch angle control," Nature Communications, Nature, vol. 11(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-13729-7
    DOI: 10.1038/s41467-019-13729-7
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    Cited by:

    1. Christian Luschnig & Jiří Friml, 2024. "Over 25 years of decrypting PIN-mediated plant development," Nature Communications, Nature, vol. 15(1), pages 1-12, December.

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