Réponses à la température élevée chez les plantes par le biais de l'oxydoréduction

Les chercheurs du LGDP ont publié en avril leurs résultats dans le Journal of Experimental Botany, résumant les connaissances actuelles sur les fonctions des systèmes ROS et oxydoréductase dans l'intégration des signaux de température élevée, vers l'activation des réponses au stress et des mécanismes d'acclimatation du développement.

"As sessile organisms, plants are particularly affected by climate change and will face more frequent and extreme temperature variations in the future. Plants have developed a diverse range of mechanisms allowing them to perceive and respond to these environmental constraints, which requires sophisticated signalling mechanisms. Reactive oxygen species (ROS) are generated in plants exposed to various stress conditions including high temperatures and are presumed to be involved in stress response reactions.

The diversity of ROS-generating pathways and the ability of ROS to propagate from cell to cell and to diffuse through cellular compartments and even across membranes between subcellular compartments put them at the centre of signalling pathways. In addition, their capacity to modify the cellular redox status and to modulate functions of target proteins, notably through cysteine oxidation, show their involvement in major stress response transduction pathways.

ROS scavenging and thiol reductase systems also participate in the transmission of oxidation-dependent stress signals. In this review, we summarize current knowledge on the functions of ROS and oxidoreductase systems in integrating high temperature signals, towards the activation of stress responses and developmental acclimation mechanisms."

Voir aussi

Sophie Hendrix, Avilien Dard, Andreas J Meyer, Jean-Philippe Reichheld
Journal of Experimental Botany, Volume 74, Issue 8, 18 April 2023, Pages 2489–507, https://doi.org/10.1093/jxb/erad053 
Redox-mediated responses to high temperature in plants

Date de modification : 23 janvier 2024 | Date de création : 23 janvier 2024 | Rédaction : Tulip Communication, Jean-Philippe Reichheld