Surveillance of cell wall diffusion barrier integrity modulates water and solute transport in plants.
- Wang P Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 3UU, UK.
- Calvo-Polanco M Biochimie & Physiologie Moléculaire des Plantes, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France.
- Reyt G Department of Plant Molecular Biology, University of Lausanne, 1015, Lausanne, Switzerland.
- Barberon M Department of Plant Molecular Biology, University of Lausanne, 1015, Lausanne, Switzerland.
- Champeyroux C Biochimie & Physiologie Moléculaire des Plantes, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France.
- Santoni V Biochimie & Physiologie Moléculaire des Plantes, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France.
- Maurel C Biochimie & Physiologie Moléculaire des Plantes, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France.
- Franke RB Department of Ecophysiology, Institute of Cellular and Molecular Botany, University of Bonn, 53115, Bonn, Germany.
- Ljung K Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE-901 83, Umeå, Sweden.
- Novak O Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, SE-901 83, Umeå, Sweden.
- Geldner N Department of Plant Molecular Biology, University of Lausanne, 1015, Lausanne, Switzerland.
- Boursiac Y Biochimie & Physiologie Moléculaire des Plantes, Univ Montpellier, CNRS, INRA, SupAgro, Montpellier, France.
- Salt DE Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen, AB24 3UU, UK. david.salt@nottingham.ac.uk.
- 2019-03-14
Published in:
- Scientific reports. - 2019
English
The endodermis is a key cell layer in plant roots that contributes to the controlled uptake of water and mineral nutrients into plants. In order to provide such functionality the endodermal cell wall has specific chemical modifications consisting of lignin bands (Casparian strips) that encircle each cell, and deposition of a waxy-like substance (suberin) between the wall and the plasma membrane. These two extracellular deposits provide control of diffusion enabling the endodermis to direct the movement of water and solutes into and out of the vascular system in roots. Loss of integrity of the Casparian strip-based apoplastic barrier is sensed by the leakage of a small peptide from the stele into the cortex. Here, we report that such sensing of barrier integrity leads to the rebalancing of water and mineral nutrient uptake, compensating for breakage of Casparian strips. This rebalancing involves both a reduction in root hydraulic conductivity driven by deactivation of aquaporins, and downstream limitation of ion leakage through deposition of suberin. These responses in the root are also coupled to a reduction in water demand in the shoot mediated by ABA-dependent stomatal closure.
- Language
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- English
- Open access status
- gold
- Identifiers
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- DOI 10.1038/s41598-019-40588-5
- PMID 30862916
- Persistent URL
- https://sonar.ch/global/documents/186476
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