Donald Danforth Plant Science Center, Saint Louis, MO 63132, USA.
J Exp Bot. 2024 Sep 27;75(18):5557-5567. doi: 10.1093/jxb/erae307.
Intercellular communication in plants, as in other multicellular organisms, allows cells in tissues to coordinate their responses for development and in response to environmental stimuli. Much of this communication is facilitated by plasmodesmata (PD), consisting of membranes and cytoplasm, that connect adjacent cells to each other. PD have long been viewed as passive conduits for the movement of a variety of metabolites and molecular cargoes, but this perception has been changing over the last two decades or so. Research from the last few years has revealed the importance of PD as signaling hubs and as crucial players in hormone signaling. The adoption of advanced biochemical approaches, molecular tools, and high-resolution imaging modalities has led to several recent breakthroughs in our understanding of the roles of PD, revealing the structural and regulatory complexity of these 'protoplasmic connecting threads'. We highlight several of these findings that we think well illustrate the current understanding of PD as functioning at the nexus of plant physiology, development, and acclimation to the environment.
植物细胞间通讯与其他多细胞生物类似，使组织中的细胞能够协调它们的反应，以进行发育并响应环境刺激。这种通讯很大程度上是通过胞间连丝（PD）实现的，PD 由膜和细胞质组成，将相邻的细胞相互连接。PD 长期以来被视为各种代谢物和分子货物移动的被动通道，但这种观点在过去二十年左右发生了变化。过去几年的研究揭示了 PD 作为信号枢纽以及在激素信号中的关键作用的重要性。先进的生化方法、分子工具和高分辨率成像方式的采用，导致我们对 PD 作用的理解取得了一些重大突破，揭示了这些“原生质连接丝”的结构和调控复杂性。我们重点介绍了其中的一些发现，我们认为这些发现很好地说明了 PD 作为植物生理学、发育和适应环境的交汇点的作用的当前理解。
