Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing 100081, China.
Biochem Biophys Res Commun. 2012 Oct 5;426(4):522-7. doi: 10.1016/j.bbrc.2012.08.118. Epub 2012 Sep 6.
As the most recently characterized group of plant hormones, brassinosteroids (BR) are involved in a number of physiological responses. Although many key components of the BR signaling pathway have been isolated and characterized, there is little information on detailed characterization of brassinosteroid-signaling kinase (BSK) proteins. In this study, Arabidopsis BSK5 was isolated and functionally analyzed. BSK5 transcripts were detected in various tissues, and were induced by abiotic stresses including salt and drought, as well as phytohormones of BR and abscisic acid (ABA). Arabidopsis loss-of-function mutant bsk5 exhibited sensitivity to salinity and ABA. Mutations of the BSK5 gene also altered the expression of several stress-regulated genes. We suggest that BSK5 responds to other signals as well as BR.
作为最近被描述的植物激素群体之一，油菜素内酯（BR）参与了许多生理反应。尽管已经分离和鉴定了 BR 信号通路的许多关键成分，但关于油菜素内酯信号激酶（BSK）蛋白的详细特征的信息很少。在这项研究中，拟南芥 BSK5 被分离并进行了功能分析。在各种组织中检测到 BSK5 转录物，并被包括盐和干旱在内的非生物胁迫以及 BR 和脱落酸（ABA）等植物激素诱导。拟南芥功能丧失突变体 bsk5 对盐度和 ABA 敏感。BSK5 基因突变还改变了几个应激调节基因的表达。我们认为 BSK5 不仅对 BR 作出反应，还对其他信号作出反应。
