Outer apoplastic barriers in roots: prospects for abiotic stress tolerance

Lucas León Peralta Ogorek; Juan de la Cruz Jiménez; Eric J. W. Visser; Hirokazu Takahashi; Mikio Nakazono; Sergey Shabala; Ole Pedersen

doi:10.1071/FP23133

RESEARCH ARTICLE (Open Access)

Previous Next Contents Vol 51(1)

Outer apoplastic barriers in roots: prospects for abiotic stress tolerance

Lucas León Peralta Ogorek

^A ^B ^* , Juan de la Cruz Jiménez

^A , Eric J. W. Visser

^C , Hirokazu Takahashi

^D , Mikio Nakazono

^D ^E , Sergey Shabala

^E ^F and Ole Pedersen

^A ^E ^*

+ Author Affiliations

- Author Affiliations

^A The Freshwater Biological Laboratory, Department of Biology, University of Copenhagen, Copenhagen 2100, Denmark.

^B School of Biosciences, University of Nottingham, Sutton Bonington LE12 5RD, UK.

^C Department of Experimental Plant Ecology, Radboud Institute for Biological and Environmental Sciences, Radboud University Nijmegen, Heyendaalseweg 135, Nijmegen 6525 AJ, Netherlands.

^D Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan.

^E School of Biological Sciences, University of Western Australia, Crawley WA 6009, Australia.

^F International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China.

^* Correspondence to: lucas.peraltaogorek@nottingham.ac.uk, opedersen@bio.ku.dk

Handling Editor: Rana Munns

Functional Plant Biology 51, FP23133 https://doi.org/10.1071/FP23133

Submitted: 27 June 2023 Accepted: 25 September 2023 Published: 10 October 2023

© 2024 The Author(s) (or their employer(s)). Published by CSIRO Publishing. This is an open access article distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND)

Abstract

Floods and droughts are becoming more frequent as a result of climate change and it is imperative to find ways to enhance the resilience of staple crops to abiotic stresses. This is crucial to sustain food production during unfavourable conditions. Here, we analyse the current knowledge about suberised and lignified outer apoplastic barriers, focusing on the functional roles of the barrier to radial O₂ loss formed as a response to soil flooding and we discuss whether this trait also provides resilience to multiple abiotic stresses. The barrier is composed of suberin and lignin depositions in the exodermal and/or sclerenchyma cell walls. In addition to the important role during soil flooding, the barrier can also restrict radial water loss, prevent phytotoxin intrusion, salt intrusion and the main components of the barrier can impede invasion of pathogens in the root. However, more research is needed to fully unravel the induction pathway of the outer apoplastic barriers and to address potential trade-offs such as reduced nutrient or water uptake. Nevertheless, we suggest that the outer apoplastic barriers might act as a jack of all trades providing tolerance to multiple abiotic and/or biotic stressors.

Keywords: abiotic stress, cell walls, drought tolerance, lignin, nutrient acquisition, oxygen deficiency, suberin, salinity stress, toxins, waterlogging.

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