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The grain yield modulator miR156 regulates seed dormancy through the gibberellin pathway in rice

Author

Listed:
  • Chunbo Miao

    (Chinese Academy of Sciences
    Zhejiang A&F University)

  • Zhen Wang

    (Chinese Academy of Sciences)

  • Lin Zhang

    (Yangzhou University)

  • Juanjuan Yao

    (Chinese Academy of Sciences)

  • Kai Hua

    (Chinese Academy of Sciences)

  • Xue Liu

    (Chinese Academy of Sciences)

  • Huazhong Shi

    (Texas Tech University)

  • Jian-Kang Zhu

    (Chinese Academy of Sciences
    Purdue University)

Abstract

The widespread agricultural problem of pre-harvest sprouting (PHS) could potentially be overcome by improving seed dormancy. Here, we report that miR156, an important grain yield regulator, also controls seed dormancy in rice. We found that mutations in one MIR156 subfamily enhance seed dormancy and suppress PHS with negligible effects on shoot architecture and grain size, whereas mutations in another MIR156 subfamily modify shoot architecture and increase grain size but have minimal effects on seed dormancy. Mechanistically, mir156 mutations enhance seed dormancy by suppressing the gibberellin (GA) pathway through de-represssion of the miR156 target gene Ideal Plant Architecture 1 (IPA1), which directly regulates multiple genes in the GA pathway. These results provide an effective method to suppress PHS without compromising productivity, and will facilitate breeding elite crop varieties with ideal plant architectures.

Suggested Citation

  • Chunbo Miao & Zhen Wang & Lin Zhang & Juanjuan Yao & Kai Hua & Xue Liu & Huazhong Shi & Jian-Kang Zhu, 2019. "The grain yield modulator miR156 regulates seed dormancy through the gibberellin pathway in rice," Nature Communications, Nature, vol. 10(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-11830-5
    DOI: 10.1038/s41467-019-11830-5
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    Cited by:

    1. Naihui Guo & Shengjia Tang & Yakun Wang & Wei Chen & Ruihu An & Zongliang Ren & Shikai Hu & Shaoqing Tang & Xiangjin Wei & Gaoneng Shao & Guiai Jiao & Lihong Xie & Ling Wang & Ying Chen & Fengli Zhao , 2024. "A mediator of OsbZIP46 deactivation and degradation negatively regulates seed dormancy in rice," Nature Communications, Nature, vol. 15(1), pages 1-14, December.
    2. Fuxi Rong & Yusong Lv & Pingchuan Deng & Xia Wu & Yaqi Zhang & Erkui Yue & Yuxin Shen & Sajid Muhammad & Fangrui Ni & Hongwu Bian & Xiangjin Wei & Weijun Zhou & Peisong Hu & Liang Wu, 2024. "Switching action modes of miR408-5p mediates auxin signaling in rice," Nature Communications, Nature, vol. 15(1), pages 1-17, December.

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