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Shoot-Silicon-Signal protein to regulate root silicon uptake in rice

Author

Listed:
  • Naoki Yamaji

    (Okayama University)

  • Namiki Mitani-Ueno

    (Okayama University)

  • Toshiki Fujii

    (Okayama University)

  • Tomonori Shinya

    (Okayama University)

  • Ji Feng Shao

    (Zhejiang Agriculture & Forestry University)

  • Shota Watanuki

    (Okayama University)

  • Yasunori Saitoh

    (Okayama University
    Research Institute for Interdisciplinary Science, Okayama University)

  • Jian Feng Ma

    (Okayama University)

Abstract

Plants accumulate silicon to protect them from biotic and abiotic stresses. Especially in rice (Oryza sativa), a typical Si-accumulator, tremendous Si accumulation is indispensable for healthy growth and productivity. Here, we report a shoot-expressed signaling protein, Shoot-Silicon-Signal (SSS), an exceptional homolog of the flowering hormone “florigen” differentiated in Poaceae. SSS transcript is only detected in the shoot, whereas the SSS protein is also detected in the root and phloem sap. When Si is supplied from the root, the SSS transcript rapidly decreases, and then the SSS protein disappears. In sss mutants, root Si uptake and expression of Si transporters are decreased to a basal level regardless of the Si supply. The grain yield of the mutants is decreased to 1/3 due to insufficient Si accumulation. Thus, SSS is a key phloem-mobile protein for integrating root Si uptake and shoot Si accumulation underlying the terrestrial adaptation strategy of grasses.

Suggested Citation

  • Naoki Yamaji & Namiki Mitani-Ueno & Toshiki Fujii & Tomonori Shinya & Ji Feng Shao & Shota Watanuki & Yasunori Saitoh & Jian Feng Ma, 2024. "Shoot-Silicon-Signal protein to regulate root silicon uptake in rice," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-55322-7
    DOI: 10.1038/s41467-024-55322-7
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    References listed on IDEAS

    as
    1. Naoki Yamaji & Akimasa Sasaki & Ji Xing Xia & Kengo Yokosho & Jian Feng Ma, 2013. "A node-based switch for preferential distribution of manganese in rice," Nature Communications, Nature, vol. 4(1), pages 1-11, December.
    2. Namiki Mitani-Ueno & Naoki Yamaji & Sheng Huang & Yuma Yoshioka & Takaaki Miyaji & Jian Feng Ma, 2023. "A silicon transporter gene required for healthy growth of rice on land," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    3. Naoki Yamaji & Yuma Takemoto & Takaaki Miyaji & Namiki Mitani-Ueno & Kaoru T. Yoshida & Jian Feng Ma, 2017. "Erratum: Reducing phosphorus accumulation in rice grains with an impaired transporter in the node," Nature, Nature, vol. 543(7643), pages 136-136, March.
    4. Eric Struyf & Adriaan Smis & Stefan Van Damme & Josette Garnier & Gerard Govers & Bas Van Wesemael & Daniel J. Conley & Okke Batelaan & Elisabeth Frot & Wim Clymans & Floor Vandevenne & Christiane Lan, 2010. "Historical land use change has lowered terrestrial silica mobilization," Nature Communications, Nature, vol. 1(1), pages 1-7, December.
    5. Naoki Yamaji & Yuma Takemoto & Takaaki Miyaji & Namiki Mitani-Ueno & Kaoru T. Yoshida & Jian Feng Ma, 2017. "Reducing phosphorus accumulation in rice grains with an impaired transporter in the node," Nature, Nature, vol. 541(7635), pages 92-95, January.
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