State Key Laboratory of Genetic Engineering and Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, People's Republic of China.
Mol Plant. 2011 Jul;4(4):588-600. doi: 10.1093/mp/ssr020. Epub 2011 Apr 6.
Brassinosteroids play diverse roles in plant growth and development. Plants deficient in brassinosteroid (BR) biosynthesis or defective in signal transduction show many abnormal developmental phenotypes, indicating the importance of both BR biosynthesis and the signaling pathway in regulating these biological processes. Recently, using genetics, proteomics, genomics, cell biology, and many other approaches, more components involved in the BR signaling pathway were identified. Furthermore, the physiological, cellular, and molecular mechanisms by which BRs regulate various aspects of plant development, are being discovered. These include root development, anther and pollen development and formation, stem elongation, vasculature differentiation, and cellulose biosynthesis, suggesting that the biological functions of BRs are far beyond promoting cell elongation. This review will focus on the up-to-date progresses about regulatory mechanisms of the BR signaling pathway and the physiological and molecular mechanisms whereby BRs regulate plant growth and development.
油菜素甾醇在植物生长和发育中发挥着多样化的作用。油菜素甾醇（BR）生物合成缺陷或信号转导缺陷的植物表现出许多异常的发育表型，这表明 BR 生物合成和信号转导途径在调节这些生物过程中的重要性。最近，通过遗传学、蛋白质组学、基因组学、细胞生物学和许多其他方法，更多参与 BR 信号通路的组分被鉴定出来。此外，BR 调节植物发育各个方面的生理、细胞和分子机制也正在被发现。这些机制包括根发育、花药和花粉发育和形成、茎伸长、脉管分化和纤维素生物合成，这表明 BR 的生物学功能远不止于促进细胞伸长。本文将重点介绍 BR 信号通路的调控机制以及 BR 调节植物生长和发育的生理和分子机制的最新进展。
