Department of Plant Systems Biology, VIB, Technologiepark 927, 9052 Gent, Belgium.
Curr Opin Plant Biol. 2011 Oct;14(5):530-7. doi: 10.1016/j.pbi.2011.05.004. Epub 2011 Jul 27.
Brassinosteroids (BRs) are plant steroid hormones known mainly for promoting organ growth through their combined effect on cell expansion and division. In addition, BRs regulate a broad spectrum of plant developmental and physiological responses, including plant architecture, vascular differentiation, male fertility, flowering, senescence, photomorphogenesis and tolerance to biotic and abiotic stresses. Recently, a complete core BR signaling pathway was defined in which BR signals are conveyed from the cell surface to the nucleus through sequential signaling modules. A major challenge now is to understand precisely how this signaling pathway controls the different BR-regulated actions. The current identification of direct targets of BRASSINAZOLE-RESISTANT1 (BRZ1) and BR-INSENSITIVE-EMS-SUPPRESSOR1 (BES1)/BZR2 transcription factors suggests that BR signaling pathway controls growth and interacts with other signaling pathways mainly at the transcriptional level.
油菜素甾醇（BRs）是一种植物甾体激素，主要通过对细胞扩展和分裂的综合作用来促进器官生长。此外，BRs 还调节着广泛的植物发育和生理反应，包括植物结构、血管分化、雄性育性、开花、衰老、光形态发生以及对生物和非生物胁迫的耐受。最近，一个完整的核心 BR 信号通路被定义，其中 BR 信号通过连续的信号模块从细胞膜传递到细胞核。目前的主要挑战是精确地了解该信号通路如何控制不同的 BR 调节作用。目前对油菜素唑抗性 1（BRZ1）和 BR-不敏感-EMS 抑制物 1（BES1）/BZR2 转录因子的直接靶标的鉴定表明，BR 信号通路主要在转录水平上控制生长并与其他信号通路相互作用。
