Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences (SLU), 90183, Umeå, Sweden.
CRRBM, Université de Picardie Jules Verne, 80000, Amiens, France.
J Exp Bot. 2023 Dec 1;74(22):6933-6949. doi: 10.1093/jxb/erad174.
Auxin is a versatile plant growth regulator that triggers multiple signalling pathways at different spatial and temporal resolutions. A plant cell is surrounded by the cell wall, a complex and dynamic network of polysaccharides. The cell wall needs to be rigid to provide mechanical support and protection and highly flexible to allow cell growth and shape acquisition. The modification of the pectin components, among other processes, is a mechanism by which auxin activity alters the mechanical properties of the cell wall. Auxin signalling precisely controls the transcriptional output of several genes encoding pectin remodelling enzymes, their local activity, pectin deposition, and modulation in different developmental contexts. This review examines the mechanism of auxin activity in regulating pectin chemistry at organ, cellular, and subcellular levels across diverse plant species. Moreover, we ask questions that remain to be addressed to fully understand the interplay between auxin and pectin in plant growth and development.
生长素是一种多功能的植物生长调节剂，可在不同的时空分辨率下触发多种信号通路。植物细胞被细胞壁包围，细胞壁是一个复杂而动态的多糖网络。细胞壁需要具有刚性以提供机械支撑和保护，并且需要具有高度的灵活性以允许细胞生长和形状获取。除其他过程外，果胶成分的修饰是生长素活性改变细胞壁机械性质的一种机制。生长素信号精确地控制了几个编码果胶重塑酶的基因的转录输出，这些基因的局部活性、果胶沉积以及在不同发育环境中的调节。本综述探讨了生长素活性在调节不同植物物种的器官、细胞和亚细胞水平的果胶化学方面的机制。此外，我们还提出了一些仍需解决的问题，以充分理解生长素和果胶在植物生长和发育中的相互作用。
