Institute of Crop Science and Resource Conservation (INRES), University of Bonn, Friedrich-Ebert-Allee 144, D-53113, Bonn, Germany.
Centre for Environmental Sciences, Hasselt University, Agoralaan Building D, B-3590, Diepenbeek, Belgium.
J Exp Bot. 2023 Apr 18;74(8):2489-2507. doi: 10.1093/jxb/erad053.
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.
作为固着生物，植物特别容易受到气候变化的影响，在未来将面临更加频繁和极端的温度变化。植物已经发展出了多种多样的机制，使它们能够感知和应对这些环境限制，这需要复杂的信号机制。在各种胁迫条件下，包括高温，植物中会产生活性氧（ROS），并假定 ROS 参与胁迫反应。ROS 生成途径的多样性以及 ROS 从一个细胞传播到另一个细胞、通过细胞区室扩散甚至在亚细胞区室之间的膜之间扩散的能力，使它们成为信号通路的核心。此外，ROS 能够修饰细胞的氧化还原状态，并通过半胱氨酸氧化等方式调节靶蛋白的功能，这表明它们参与了主要的胁迫反应转导途径。ROS 清除和巯基还原酶系统也参与氧化依赖的胁迫信号的传递。在这篇综述中，我们总结了目前关于 ROS 和氧化还原酶系统在整合高温信号、激活胁迫反应和发育适应机制方面的功能的知识。
