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A RAF-SnRK2 kinase cascade mediates early osmotic stress signaling in higher plants

Author

Listed:
  • Zhen Lin

    (Chinese Academy of Sciences)

  • Yuan Li

    (China Agricultural University
    Purdue University)

  • Zhengjing Zhang

    (Chinese Academy of Sciences)

  • Xiaolei Liu

    (Chinese Academy of Sciences)

  • Chuan-Chih Hsu

    (Chinese Academy of Sciences
    Carnegie Institution for Science)

  • Yanyan Du

    (Chinese Academy of Sciences)

  • Tian Sang

    (Chinese Academy of Sciences)

  • Chen Zhu

    (Chinese Academy of Sciences)

  • Yubei Wang

    (Chinese Academy of Sciences)

  • Viswanathan Satheesh

    (Chinese Academy of Sciences)

  • Pritu Pratibha

    (Chinese Academy of Sciences)

  • Yang Zhao

    (Chinese Academy of Sciences)

  • Chun-Peng Song

    (Henan University)

  • W. Andy Tao

    (Purdue University
    Purdue University)

  • Jian-Kang Zhu

    (Chinese Academy of Sciences
    Purdue University)

  • Pengcheng Wang

    (Chinese Academy of Sciences)

Abstract

Osmoregulation is important for plant growth, development and response to environmental changes. SNF1-related protein kinase 2s (SnRK2s) are quickly activated by osmotic stress and are central components in osmotic stress and abscisic acid (ABA) signaling pathways; however, the upstream components required for SnRK2 activation and early osmotic stress signaling are still unknown. Here, we report a critical role for B2, B3 and B4 subfamilies of Raf-like kinases (RAFs) in early osmotic stress as well as ABA signaling in Arabidopsis thaliana. B2, B3 and B4 RAFs are quickly activated by osmotic stress and are required for phosphorylation and activation of SnRK2s. Analyses of high-order mutants of RAFs reveal critical roles of the RAFs in osmotic stress tolerance and ABA responses as well as in growth and development. Our findings uncover a kinase cascade mediating osmoregulation in higher plants.

Suggested Citation

  • Zhen Lin & Yuan Li & Zhengjing Zhang & Xiaolei Liu & Chuan-Chih Hsu & Yanyan Du & Tian Sang & Chen Zhu & Yubei Wang & Viswanathan Satheesh & Pritu Pratibha & Yang Zhao & Chun-Peng Song & W. Andy Tao &, 2020. "A RAF-SnRK2 kinase cascade mediates early osmotic stress signaling in higher plants," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-14477-9
    DOI: 10.1038/s41467-020-14477-9
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