关键词: 油菜素内酯;信号转导;植物发育;作物育种

Abstract:

Brassinosteroids (BRs) is a major plant growth-promoting hormone regulating developmental and physiological processes. The recent studies on BRs indicated that it could increase crop yield and enhance crop resistance to stress. Protein kinase BRI1 and BAK1 initiated outgoing intracellular BRs signal transduction, and the downstream transcription factor BZR1 and BZR2/BES1 were responsible for gene regulation. There were key phosphorylation sites of receptor kinase and TFs responsible for BR signaling, which could be simply manipulated by mutagenesis. Dissect LRR-kinase signal transduction based on protein structure and gene function, and through protein modification based on site-direction mutation can benefit for elucidating BR signaling pathway and network, and eventually improve the plant adaptation for stress environment. This paper summarized studies on BRs signaling pathways and its relationship with plant development and environmental stress, hoping to provide good references for plant molecular breeding.

Key words: brassinosteroids, signal transduction, plant development, crop breeding