Redox-mediated responses to high temperature in plants

Abstract

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 large panel 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, to diffuse through cellular compartments and even across membranes between subcellular compartments put them at the centre of signalling pathways. In addition, their capacities to modify the cellular redox status and to modulate functions of target proteins, notably through cysteine oxidation, involve them 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.

The Essential Role of H2S-ABA Crosstalk in Maize Thermotolerance through the ROS-Scavenging System

“…Oxidative stress is the major heat injury in plants due to the excessive accumulation of ROS under HS conditions [23,[33][34][35]. Correspondingly, the acquirement of thermotolerance in plants and the ROS-scavenging system goes hand in hand [36][37][38][39][40][41].…”

Hydrogen peroxide sulfenylates and inhibits the photorespiratory enzyme PGLP1 to modulate plant thermotolerance

“…Average global surface temperatures are predicted to increase by over 3°C by the end of the 21st century, and each degree Celsius increase in global mean temperature is predicted, on average, to reduce global yields of wheat ( Triticum aestivum ) by 6.0%, rice ( Oryza sativa ) by 3.2%, maize ( Zea mays ) by 7.4%, and soybean ( Glycine max ) by 3.1%, depending on the specific climate model used ( Challinor et al., 2014 ; Smith et al., 2015 ; Raftery et al., 2017 ; Zhao et al., 2017 ). High temperatures adversely affect almost all aspects of plant growth, development, reproduction, and yield by causing the accumulation of toxic by-products such as reactive oxygen species (ROS) and damaged proteins ( Wang et al., 2018 ; Hendrix et al., 2023 ). To counteract the damage imposed by heat stress, plants use ROS-scavenging enzymes and heat shock proteins as mitigation mechanisms ( Driedonks et al., 2015 ; Suzuki and Katano, 2018 ).…”

Physiological and Transcriptome Analyses Reveal the Protective Effect of Exogenous Trehalose in Response to Heat Stress in Tea Plant (Camellia sinensis)

“…Furthermore, high temperatures can disrupt the photosynthesis of tea plants by deactivating photosystems, light-harvesting chlorophyll protein complexes, and altering carbon fixation [7]. In addition, high temperature leads to excessive accumulation of reactive oxygen species (ROS) and malondialdehyde (MDA), causing structural damage to plant cells [8]. Therefore, it is of great significance to develop strategies to improve the heat-stress resistance of tea plants.…”