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Auxin-dependent control of a plasmodesmal regulator creates a negative feedback loop modulating lateral root emergence

Author

Listed:
  • Ross Sager

    (University of Delaware)

  • Xu Wang

    (University of Delaware
    Universität Hohenheim)

  • Kristine Hill

    (University of Nottingham
    Universität Tübingen)

  • Byung-Chun Yoo

    (Christina Health Care System)

  • Jeffery Caplan

    (University of Delaware
    University of Delaware
    University of Delaware)

  • Alex Nedo

    (University of Delaware)

  • Thu Tran

    (University of Delaware)

  • Malcolm J. Bennett

    (University of Nottingham)

  • Jung-Youn Lee

    (University of Delaware
    University of Delaware
    University of Delaware)

Abstract

Lateral roots originate from initial cells deep within the main root and must emerge through several overlying layers. Lateral root emergence requires the outgrowth of the new primordium (LRP) to coincide with the timely separation of overlying root cells, a developmental program coordinated by the hormone auxin. Here, we report that in Arabidopsis thaliana roots, auxin controls the spatiotemporal expression of the plasmodesmal regulator PDLP5 in cells overlying LRP, creating a negative feedback loop. PDLP5, which functions to restrict the cell-to-cell movement of signals via plasmodesmata, is induced by auxin in cells overlying LRP in a progressive manner. PDLP5 localizes to plasmodesmata in these cells and negatively impacts organ emergence as well as overall root branching. We present a model, incorporating the spatiotemporal expression of PDLP5 in LRP-overlying cells into known auxin-regulated LRP-overlying cell separation pathways, and speculate how PDLP5 may function to negatively regulate the lateral root emergence process.

Suggested Citation

  • Ross Sager & Xu Wang & Kristine Hill & Byung-Chun Yoo & Jeffery Caplan & Alex Nedo & Thu Tran & Malcolm J. Bennett & Jung-Youn Lee, 2020. "Auxin-dependent control of a plasmodesmal regulator creates a negative feedback loop modulating lateral root emergence," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-019-14226-7
    DOI: 10.1038/s41467-019-14226-7
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    Cited by:

    1. Matthieu Pierre Platre & Santosh B. Satbhai & Lukas Brent & Matias F. Gleason & Min Cao & Magali Grison & Marie Glavier & Ling Zhang & Christophe Gaillochet & Christian Goeschl & Marco Giovannetti & B, 2022. "The receptor kinase SRF3 coordinates iron-level and flagellin dependent defense and growth responses in plants," Nature Communications, Nature, vol. 13(1), pages 1-18, December.

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