拟南芥生物钟分子机制研究进展

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。

Research Progress of Molecular Mechanism of theCircadian Clock in Arabidopsis

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 physiologyby 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 photoperiodicregulation of flowering time. The key gene in this model, CO, is necessary and sufficient for flowering.