Haubrick L L, Assmann S M
Pennsylvania State University, Department of Biology, 208 Mueller Laboratory, University Park, PA 16802, USA.
Plant Cell Environ. 2006 Mar;29(3):446-57. doi: 10.1111/j.1365-3040.2005.01481.x.
The role of brassinosteroids (BRs) in plant function has been intensively studied in the last few years. Mutant analysis has demonstrated that the ability to synthesize, perceive and respond to BRs is essential to normal plant growth and development. Several key elements of BR response have been identified using both genetic and biochemical approaches, and molecular models that parallel Wingless (Wnt), transforming growth factor beta (TGF beta) and receptor tyrosine kinase (RTK) signalling in animals have been proposed. Many studies have demonstrated the role of BRs, alone and in interaction with other plant hormones, in processes such as cell elongation and seed germination. In contrast, little is known about how the sensing of BRs is connected to specific physiological responses such as stress resistance. There remain many open questions about how these connections are made.
在过去几年中，油菜素内酯（BRs）在植物功能中的作用得到了深入研究。突变体分析表明，合成、感知和响应BRs的能力对于植物的正常生长发育至关重要。利用遗传和生化方法已经确定了BR响应的几个关键要素，并提出了与动物中无翅（Wnt）、转化生长因子β（TGFβ）和受体酪氨酸激酶（RTK）信号传导平行的分子模型。许多研究已经证明了BRs单独以及与其他植物激素相互作用在细胞伸长和种子萌发等过程中的作用。相比之下，关于BRs的感知如何与诸如抗逆性等特定生理反应相关联，我们知之甚少。关于这些联系是如何建立的，仍然存在许多未解决的问题。
