植物学报 ›› 2006, Vol. 23 ›› Issue (5): 478-498.

所属专题: 激素香山会议专辑 (2006年23卷5期)

• 综述*细胞分裂素 • 上一篇    下一篇

细胞分裂素: 代谢、信号转导、交叉反应与农艺性状改良

邓岩 王兴春 杨淑华 左建儒   

  1. 1(中国科学院遗传与发育生物学研究所, 植物基因组学国家重点实验室, 北京 100101) 2(中国农业大学生物学院, 植物生理学与生物化学国家重点实验室, 北京 100094)
  • 收稿日期:2006-08-01 修回日期:2006-09-01 出版日期:2006-09-25 发布日期:2006-09-25
  • 通讯作者: 杨淑华 左建儒

New Insights into Cytokinins: Metabolism, Signal Transduction, Cross Talks and Potentials in Agricultural Applications

Yan Deng, Xingchun Wang, Shuhua Yang, Jianru Zuo   

  1. 1(State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China) 2(State Key Laboratory of Plant Physiology and Biochemistry, China Agriculture University, Beijing)
  • Received:2006-08-01 Revised:2006-09-01 Online:2006-09-25 Published:2006-09-25
  • Contact: Shuhua Yang, Jianru Zuo

摘要: 在高等植物中, 细胞分裂素通过对细胞分裂与分化的调节而广泛参与了对植物生长发育的调控。在过去的10余年, 利用模式植物拟南芥的研究, 在阐明细胞分裂素的代谢、转运与信号转导等方面取得了重要的进展。同时, 关于细胞分裂素与其它信号途径之间存在的广泛交叉反应也受到了人们的注意。根据我们现有的知识, 细胞分裂素信号转导是通过磷酸基团在一个双元组分系统之间的系列传递而完成的, 该过程被称之为“磷酸接力传递”(phosphorelay)。细胞分裂素与其它信号途径的互作可能也主要是通过双元组分系统链接的。双元组分系统中目前已知的主要信号元件不仅表现出功能冗余性, 同时在调控特定的植物生长发育过程时也具有特异性。本文在对细胞分裂素的代谢与转运过程简要评述的基础上,对其信号转导以及与其它信号途径间交叉反应的研究进展进行重点讨论, 并展望细胞分裂素研究对重要农业性状改良的意义。

Abstract: The plant phytohormone cytokinin regulates numerous growth and developmental processes by regulating cell division and cell differentiation. During the past ten years, remarkable progress has been made to our understanding on the cytokinin metabolism, transport and signaling, mainly using Arabidopsis thaliana as a model system. In addition, substantial attentions have also been paid to crosstalks between cytokinin and other signaling pathways. According to our current understanding, cytokinin signaling is mediated by sequentially transferring a phosphoryl group in different members of a two-component system, referred to as phosphorelay. The two-component system may also act as a module linking cytokinin and other signaling pathways. Most known members of the two-component system are functionally redundant, but also show distinctive function in the regulation of a variety of developmental processes. In this review, we summarize our current understanding on cytokinin metabolism and transport, and discuss in detail on recent advances in cytokinin signaling as well as its cross-talks with other signaling pathways. We also make prospects on possible improvement of important agricultural traits by manipulating the cytokinin network.