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Two chemically distinct root lignin barriers control solute and water balance

Author

Listed:
  • Guilhem Reyt

    (University of Nottingham)

  • Priya Ramakrishna

    (University of Nottingham
    University of Geneva)

  • Isai Salas-González

    (University of North Carolina at Chapel Hill)

  • Satoshi Fujita

    (Biophore, University of Lausanne
    National Institute of Genetics)

  • Ashley Love

    (University of Nottingham)

  • David Tiemessen

    (University of Nottingham)

  • Catherine Lapierre

    (Université Paris-Saclay)

  • Kris Morreel

    (Ghent University
    Center for Plant Systems Biology, VIB)

  • Monica Calvo-Polanco

    (University of Montpellier, CNRS, INRAE, SupAgro
    University of Salamanca)

  • Paulina Flis

    (University of Nottingham)

  • Niko Geldner

    (Biophore, University of Lausanne)

  • Yann Boursiac

    (University of Montpellier, CNRS, INRAE, SupAgro)

  • Wout Boerjan

    (Ghent University
    Center for Plant Systems Biology, VIB)

  • Michael W. George

    (University of Nottingham
    The University of Nottingham Ningbo China)

  • Gabriel Castrillo

    (University of Nottingham)

  • David E. Salt

    (University of Nottingham)

Abstract

Lignin is a complex polymer deposited in the cell wall of specialised plant cells, where it provides essential cellular functions. Plants coordinate timing, location, abundance and composition of lignin deposition in response to endogenous and exogenous cues. In roots, a fine band of lignin, the Casparian strip encircles endodermal cells. This forms an extracellular barrier to solutes and water and plays a critical role in maintaining nutrient homeostasis. A signalling pathway senses the integrity of this diffusion barrier and can induce over-lignification to compensate for barrier defects. Here, we report that activation of this endodermal sensing mechanism triggers a transcriptional reprogramming strongly inducing the phenylpropanoid pathway and immune signaling. This leads to deposition of compensatory lignin that is chemically distinct from Casparian strip lignin. We also report that a complete loss of endodermal lignification drastically impacts mineral nutrients homeostasis and plant growth.

Suggested Citation

  • Guilhem Reyt & Priya Ramakrishna & Isai Salas-González & Satoshi Fujita & Ashley Love & David Tiemessen & Catherine Lapierre & Kris Morreel & Monica Calvo-Polanco & Paulina Flis & Niko Geldner & Yann , 2021. "Two chemically distinct root lignin barriers control solute and water balance," Nature Communications, Nature, vol. 12(1), pages 1-15, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-22550-0
    DOI: 10.1038/s41467-021-22550-0
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    Cited by:

    1. Inês Catarina Ramos Barbosa & Damien De Bellis & Isabelle Flückiger & Etienne Bellani & Mathieu Grangé-Guerment & Kian Hématy & Niko Geldner, 2023. "Directed growth and fusion of membrane-wall microdomains requires CASP-mediated inhibition and displacement of secretory foci," Nature Communications, Nature, vol. 14(1), pages 1-18, December.

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