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ABA-mediated regulation of rice grain quality and seed dormancy via the NF-YB1-SLRL2-bHLH144 Module

Author

Listed:
  • Jin-Dong Wang

    (Yangzhou University)

  • Jing Wang

    (Yangzhou University)

  • Li-Chun Huang

    (Yangzhou University)

  • Li-Jun Kan

    (Yangzhou University)

  • Chu-Xin Wang

    (Yangzhou University)

  • Min Xiong

    (Yangzhou University)

  • Peng Zhou

    (Yangzhou University)

  • Li-Hui Zhou

    (Yangzhou University)

  • Chen Chen

    (Yangzhou University)

  • Dong-Sheng Zhao

    (Yangzhou University)

  • Xiao-Lei Fan

    (Yangzhou University)

  • Chang-Quan Zhang

    (Yangzhou University)

  • Yong Zhou

    (Yangzhou University)

  • Lin Zhang

    (Yangzhou University)

  • Qiao-Quan Liu

    (Yangzhou University
    Yangzhou University)

  • Qian-Feng Li

    (Yangzhou University
    Yangzhou University)

Abstract

Abscisic acid (ABA) plays a crucial role in promoting plant stress resistance and seed dormancy. However, how ABA regulates rice quality remains unclear. This study identifies a key transcription factor SLR1-like2 (SLRL2), which mediates the ABA-regulated amylose content (AC) of rice. Mechanistically, SLRL2 interacts with NF-YB1 to co-regulate Wx, a determinant of AC and rice quality. In contrast to SLR1, SLRL2 is ABA inducible but insensitive to GA. In addition, SLRL2 exhibits DNA-binding activity and directly regulates the expression of Wx, bHLH144 and MFT2. SLRL2 competes with NF-YC12 for interaction with NF-YB1. NF-YB1 also directly represses SLRL2 transcription. Genetic validation supports that SLRL2 functions downstream of NF-YB1 and bHLH144 in regulating rice AC. Thus, an NF-YB1-SLRL2-bHLH144 regulatory module is successfully revealed. Furthermore, SLRL2 regulates rice dormancy by modulating the expression of MFT2. In conclusion, this study revealed an ABA-responsive regulatory cascade that functions in both rice quality and seed dormancy.

Suggested Citation

  • Jin-Dong Wang & Jing Wang & Li-Chun Huang & Li-Jun Kan & Chu-Xin Wang & Min Xiong & Peng Zhou & Li-Hui Zhou & Chen Chen & Dong-Sheng Zhao & Xiao-Lei Fan & Chang-Quan Zhang & Yong Zhou & Lin Zhang & Qi, 2024. "ABA-mediated regulation of rice grain quality and seed dormancy via the NF-YB1-SLRL2-bHLH144 Module," Nature Communications, Nature, vol. 15(1), pages 1-16, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48760-w
    DOI: 10.1038/s41467-024-48760-w
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    References listed on IDEAS

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    1. Zhigang Liao & Hong Yu & Jingbo Duan & Kun Yuan & Chaoji Yu & Xiangbing Meng & Liquan Kou & Mingjiang Chen & Yanhui Jing & Guifu Liu & Steven M. Smith & Jiayang Li, 2019. "SLR1 inhibits MOC1 degradation to coordinate tiller number and plant height in rice," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
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