植物学报 ›› 2005, Vol. 22 ›› Issue (03): 341-349.

• 专题介绍 • 上一篇    下一篇

拟南芥生物钟分子机制研究进展

徐张红,赵晓刚,何奕昆   

  1. (首都师范大学生物系 北京 100037)
  • 收稿日期:2004-01-18 修回日期:2004-06-29 出版日期:2005-06-20 发布日期:2005-06-20
  • 通讯作者: 何奕昆 Author for correspondence. E-mail: yhe@mail.cnu.edu.cn

Research Progress of Molecular Mechanism of the Circadian Clock in Arabidopsis

XU Zhang-Hong ZHAO Xiao-Gang HE Yi-Kun   

  1. (Department of Biology, Capital Normal University, Beijing 100037) 
  • Received:2004-01-18 Revised:2004-06-29 Online:2005-06-20 Published:2005-06-20
  • Contact: Author for correspondence. E-mail: yhe@mail.cnu.edu.cn

摘要: 本文主要概述了目前拟南芥生物钟分子机制的研究进展。生物钟通过调控导引节律的相位来调节植物的生理活动。拟南芥生物钟由CCA1、LHY和TOC1 3个主要基因构成了一个稳定的负反馈环,来调节昼夜节律中各个基因如APRR/TOC1 5重奏的作用, 从而调控昼夜节律的相位。在开花的光周期调控中, 提出了外协和模型, 其中的关键基因是CO , 它与拟南芥的开花时间直接相关。

关键词: 拟南芥, 生物钟, 负反馈环, 光周期

Abstract: This paper reviews the current progresses in studying molecular mechanism of the circadian clock in plants, especially in Arabidopsis. The circadian clock contributes to plant physiology by regulating the phase of entrained rhythms. A gene circuit of negative feedback comprises 3 main genes: CCA1, LHY, and TOC1. The “external coincidence” model has been proposed for photoperiodic regulation of flowering time. The key gene in this model, CO, is necessary and sufficient for flowering.

Key words: Arabidopsis, Circadian clock, Negative feedback ciecuit, Photoperiod