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A micro RNA mediates shoot control of root branching

Author

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  • Moritz Sexauer

    (Eberhard-Karls-University, Centre for Molecular Biology of Plants
    Julius-Maximilians-University, Julius-von-Sachs Institute for Biosciences)

  • Hemal Bhasin

    (Eberhard-Karls-University, Centre for Molecular Biology of Plants
    University of Toronto – Scarborough, Department of Biological Sciences)

  • Maria Schön

    (Eberhard-Karls-University, Centre for Molecular Biology of Plants)

  • Elena Roitsch

    (Eberhard-Karls-University, Centre for Molecular Biology of Plants
    Martin-Luther-University Halle-Wittenberg, Institute for Genetics)

  • Caroline Wall

    (Eberhard-Karls-University, Centre for Molecular Biology of Plants)

  • Ulrike Herzog

    (Eberhard-Karls-University, Centre for Molecular Biology of Plants)

  • Katharina Markmann

    (Eberhard-Karls-University, Centre for Molecular Biology of Plants
    Martin-Luther-University Halle-Wittenberg, Institute for Genetics
    Julius-Maximilians-University, Julius-von-Sachs Institute for Biosciences)

Abstract

Plants extract mineral nutrients from the soil, or from interactions with mutualistic soil microbes via their root systems. Adapting root architecture to nutrient availability enables efficient resource utilization, particularly in patchy and dynamic environments. Root growth responses to soil nitrogen levels are shoot-mediated, but the identity of shoot-derived mobile signals regulating root growth responses has remained enigmatic. Here we show that a shoot-derived micro RNA, miR2111, systemically steers lateral root initiation and nitrogen responsiveness through its root target TML (TOO MUCH LOVE) in the legume Lotus japonicus, where miR2111 and TML were previously shown to regulate symbiotic infections with nitrogen fixing bacteria. Intriguingly, systemic control of lateral root initiation by miR2111 and TML/HOLT (HOMOLOGUE OF LEGUME TML) was conserved in the nonsymbiotic ruderal Arabidopsis thaliana, which follows a distinct ecological strategy. Thus, the miR2111-TML/HOLT regulon emerges as an essential, conserved factor in adaptive shoot control of root architecture in dicots.

Suggested Citation

  • Moritz Sexauer & Hemal Bhasin & Maria Schön & Elena Roitsch & Caroline Wall & Ulrike Herzog & Katharina Markmann, 2023. "A micro RNA mediates shoot control of root branching," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43738-6
    DOI: 10.1038/s41467-023-43738-6
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    References listed on IDEAS

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    1. Chloé Marchive & François Roudier & Loren Castaings & Virginie Bréhaut & Eddy Blondet & Vincent Colot & Christian Meyer & Anne Krapp, 2013. "Nuclear retention of the transcription factor NLP7 orchestrates the early response to nitrate in plants," Nature Communications, Nature, vol. 4(1), pages 1-9, June.
    2. Satoru Okamoto & Hidefumi Shinohara & Tomoko Mori & Yoshikatsu Matsubayashi & Masayoshi Kawaguchi, 2013. "Root-derived CLE glycopeptides control nodulation by direct binding to HAR1 receptor kinase," Nature Communications, Nature, vol. 4(1), pages 1-7, October.
    3. Nao Okuma & Takashi Soyano & Takuya Suzaki & Masayoshi Kawaguchi, 2020. "MIR2111-5 locus and shoot-accumulated mature miR2111 systemically enhance nodulation depending on HAR1 in Lotus japonicus," Nature Communications, Nature, vol. 11(1), pages 1-13, December.
    4. Niraj Shah & Tomomi Wakabayashi & Yasuko Kawamura & Cathrine Kiel Skovbjerg & Ming-Zhuo Wang & Yusdar Mustamin & Yoshiko Isomura & Vikas Gupta & Haojie Jin & Terry Mun & Niels Sandal & Fuyuki Azuma & , 2020. "Extreme genetic signatures of local adaptation during Lotus japonicus colonization of Japan," Nature Communications, Nature, vol. 11(1), pages 1-15, December.
    5. Ryosuke Ota & Yuri Ohkubo & Yasuko Yamashita & Mari Ogawa-Ohnishi & Yoshikatsu Matsubayashi, 2020. "Shoot-to-root mobile CEPD-like 2 integrates shoot nitrogen status to systemically regulate nitrate uptake in Arabidopsis," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
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