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Shade-induced RTFL/DVL peptides negatively regulate the shade response by directly interacting with BSKs in Arabidopsis

Author

Listed:
  • Sha Huang

    (Fudan University)

  • Yu Ma

    (Fudan University)

  • Yitian Xu

    (Fudan University)

  • Pengfei Lu

    (Fudan University)

  • Jie Yang

    (Fudan University)

  • Yu Xie

    (Fudan University)

  • Jianhua Gan

    (Fudan University)

  • Lin Li

    (Fudan University)

Abstract

For shade-intolerant species, shade light indicates the close proximity of neighboring plants and triggers the shade avoidance syndrome (SAS), which causes exaggerated growth and reduced crop yield. Here, we report that non-secreted ROT FOUR LIKE (RTFL)/DEVIL (DVL) peptides negatively regulate SAS by interacting with BRASSINOSTEROID SIGNALING KINASEs (BSKs) and reducing the protein level of PHYTOCHROME INTERACTING FACTOR 4 (PIF4) in Arabidopsis. The transcription of at least five RTFLs (RTFL13/16/17/18/21) is induced by low R:FR light. The RTFL18 (DVL1) protein is stabilized under low R:FR conditions and localized to the plasma membrane. A phenotype analysis reveals that RTFL18 negatively regulates low R:FR-promoted petiole elongation. BSK3 and BSK6 are identified as partners of RTFL18 through binding assays and structural modeling. The overexpression of RTFL18 or knockdown of BSK3/6 reduces BRASSINOSTEROID signaling and reduces low R:FR-stabilized PIF4 levels. Genetically, the overexpression of BSK3/6 and PIF4 restores the petiole phenotype acquired by RTFL18-overexpressing lines. Collectively, our work characterizes a signaling cascade (the RTFLs-BSK3/6-PIF4 pathway) that prevents the excessive activation of the shade avoidance response in Arabidopsis.

Suggested Citation

  • Sha Huang & Yu Ma & Yitian Xu & Pengfei Lu & Jie Yang & Yu Xie & Jianhua Gan & Lin Li, 2023. "Shade-induced RTFL/DVL peptides negatively regulate the shade response by directly interacting with BSKs in Arabidopsis," Nature Communications, Nature, vol. 14(1), pages 1-15, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42618-3
    DOI: 10.1038/s41467-023-42618-3
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    Cited by:

    1. Qican Cheng & Yue Zeng & Sha Huang & Chuanwei Yang & Yu Xie & Wen-Hui Shen & Lin Li, 2024. "PHYTOCHROME-INTERACTING FACTOR 7 and RELATIVE OF EARLY FLOWERING 6 act in shade avoidance memory in Arabidopsis," Nature Communications, Nature, vol. 15(1), pages 1-15, December.

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