Journal Article

Two chemically distinct root lignin barriers control solute and water balance

Morreel, Kris, Ramakrishna, Priya, Geldner, Niko, Flis, Paulina, Fujita, Satoshi, George, Michael, W, Institut Jean-Pierre Bourgin - Sciences du végétal (IJPB) ; AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Salt, David, E, Boursiac, Yann, Reyt, Guilhem, Department of Plant Systems Biology, VIB, and Department of Plant Biotechnology and Bioinformatics ; Universiteit Gent = Ghent University = Université de Gand (UGENT), Curriculum in Bioinformatics and Computational Biology ; University of North Carolina [Chapel Hill] (UNC) ; University of North Carolina System (UNC)-University of North Carolina System (UNC), Castrillo, Gabriel, Calvo-Polanco, Monica, School of Chemistry [Nottingham, UK] (School of Chemistry) ; University of Nottingham, UK (UON), Biochimie et Physiologie Moléculaire des Plantes (BPMP) ; Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut national d’études supérieures agronomi

2021

Overview

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.

• Publisher: Nature Publishing Group,CCSD,Nature Publishing Group UK,Nature Portfolio
• Subject: 14/19 / 14/34 / 14/63 / 140/133 / 38/91 / 631/449/1736 / 631/449/2667 / 631/449/2675 / 631/449/448/1365 / Arabidopsis - cytology / Arabidopsis - genetics / Arabidopsis - metabolism / Arabidopsis Proteins - genetics / Arabidopsis Proteins - metabolism / Cell Membrane - metabolism / Cell Wall - genetics / Cell Wall - metabolism / Cell walls / Defects / Deposition / Diffusion / Diffusion barriers / Homeostasis / Humanities and Social Sciences / Life Sciences / Lignin / Lignin - chemistry / Lignin - metabolism / Microscopy, Fluorescence - methods / multidisciplinary / Mutation / Nutrients / Phenylpropionates - metabolism / Plant cells / Plant growth / Plant Roots - cytology / Plant Roots - genetics / Plant Roots - metabolism / Plants, Genetically Modified / Polymers / RNA-Seq - methods / Science / Science (multidisciplinary) / Seals / Signal transduction / Signaling / Solutes / Strip / Transcription / Transcription Factors - genetics / Transcription Factors - metabolism / Vegetal Biology / Water - metabolism / Water balance / Xylem - genetics / Xylem - metabolism
• ISBN: 0006418502000