Outer apoplastic barriers in roots: prospects for abiotic stress tolerance.
Funct Plant Biol
; 51(1): NULL, 2024 Jan.
Article
em En
| MEDLINE
| ID: mdl-37814289
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.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Água
/
Raízes de Plantas
Idioma:
En
Revista:
Funct Plant Biol
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Reino Unido