Department of Plant Biochemistry, Center for Plant Molecular Biology (ZMBP), Eberhard-Karls University, Tübingen, Germany; email:
Annu Rev Plant Biol. 2022 May 20;73:323-353. doi: 10.1146/annurev-arplant-102820-095312. Epub 2022 Feb 15.
Plant architecture fundamentally differs from that of other multicellular organisms in that individual cells serve as osmotic bricks, defined by the equilibrium between the internal turgor pressure and the mechanical resistance of the surrounding cell wall, which constitutes the interface between plant cells and their environment. The state and integrity of the cell wall are constantly monitored by cell wall surveillance pathways, which relay information to the cell interior. A recent surge of discoveries has led to significant advances in both mechanistic and conceptual insights into a multitude of cell wall response pathways that play diverse roles in the development, defense, stress response, and maintenance of structural integrity of the cell. However, these advances have also revealed the complexity of cell wall sensing, and many more questions remain to be answered, for example, regarding the mechanisms of cell wall perception, the molecular players in this process, and how cell wall-related signals are transduced and integrated into cellular behavior. This review provides an overview of the mechanistic and conceptual insights obtained so far and highlights areas for future discoveries in this exciting area of plant biology.
植物的结构从根本上不同于其他多细胞生物，因为单个细胞充当渗透砖，其由内部膨压和周围细胞壁的机械阻力之间的平衡来定义，细胞壁构成了植物细胞与其环境之间的界面。细胞壁监测途径不断监测细胞壁的状态和完整性，并将信息传递到细胞内部。最近的一系列发现使得人们对多种细胞壁反应途径的机械和概念理解有了重大进展，这些途径在细胞的发育、防御、应激反应和结构完整性的维持中发挥着多样化的作用。然而，这些进展也揭示了细胞壁感知的复杂性，还有更多的问题有待回答，例如细胞壁感知的机制、这个过程中的分子参与者，以及细胞壁相关信号如何被转导并整合到细胞行为中。这篇综述概述了迄今为止获得的机械和概念见解，并强调了在这个令人兴奋的植物生物学领域未来发现的重点领域。
