Novaković Lazar, Guo Tingting, Bacic Antony, Sampathkumar Arun, Johnson Kim L
School of BioSciences, University of Melbourne, Parkville, VIC 3010, Australia.
Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam, Germany.
Plants (Basel). 2018 Oct 23;7(4):89. doi: 10.3390/plants7040089.
Plant cells are surrounded by highly dynamic cell walls that play important roles regulating aspects of plant development. Recent advances in visualization and measurement of cell wall properties have enabled accumulation of new data about wall architecture and biomechanics. This has resulted in greater understanding of the dynamics of cell wall deposition and remodeling. The cell wall is the first line of defense against different adverse abiotic and biotic environmental influences. Different abiotic stress conditions such as salinity, drought, and frost trigger production of Reactive Oxygen Species (ROS) which act as important signaling molecules in stress activated cellular responses. Detection of ROS by still-elusive receptors triggers numerous signaling events that result in production of different protective compounds or even cell death, but most notably in stress-induced cell wall remodeling. This is mediated by different plant hormones, of which the most studied are jasmonic acid and brassinosteroids. In this review we highlight key factors involved in sensing, signal transduction, and response(s) to abiotic stress and how these mechanisms are related to cell wall-associated stress acclimatization. ROS, plant hormones, cell wall remodeling enzymes and different wall mechanosensors act coordinately during abiotic stress, resulting in abiotic stress wall acclimatization, enabling plants to survive adverse environmental conditions.
植物细胞被高度动态的细胞壁所包围，这些细胞壁在调节植物发育的各个方面发挥着重要作用。细胞壁特性可视化和测量方面的最新进展使得有关细胞壁结构和生物力学的新数据得以积累。这使得人们对细胞壁沉积和重塑的动态过程有了更深入的了解。细胞壁是抵御不同非生物和生物环境不利影响的第一道防线。不同的非生物胁迫条件，如盐度、干旱和霜冻，会触发活性氧（ROS）的产生，而活性氧在胁迫激活的细胞反应中作为重要的信号分子。难以捉摸的受体对ROS的检测会引发众多信号事件，这些事件会导致产生不同的保护化合物甚至细胞死亡，但最显著的是在胁迫诱导的细胞壁重塑中。这是由不同的植物激素介导的，其中研究最多的是茉莉酸和油菜素类固醇。在这篇综述中，我们强调了参与非生物胁迫感知、信号转导和反应的关键因素，以及这些机制与细胞壁相关胁迫适应的关系。在非生物胁迫期间，ROS、植物激素、细胞壁重塑酶和不同的细胞壁机械传感器协同作用，导致非生物胁迫细胞壁适应，使植物能够在不利的环境条件下生存。
