Arabidopsis circadian clock and photoperiodism: time to think about location.
Arabidopsis circadian clock and photoperiodism: time to think about location.
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DOI：
10.1016/j.pbi.2009.09.007
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发表时间：
2010-02
影响因子：
9.5
通讯作者：
Imaizumi, Takato
中科院分区：
文献类型：
--
作者：
Imaizumi, Takato
植物拥有生物钟，使它们能够协调内部生物事件与外部日常变化。最近在拟南芥中的研究表明，存在组织特异性的时钟组件，并且时钟网络结构在不同器官中也不同。这些发现表明，植物体内的生物钟组成是相当可变的。植物利用生物钟来测量日长的变化，以调节季节性反应，如开花。为了确保开花发生在最佳条件下，时钟调节昼夜CONSTANS（CO）的表达。随后，CO蛋白诱导导致开花的FLOW LOCUS T（FT）表达。CO和FT的表达都受到具有重叠功能的转录因子的复杂控制。
Plants possess a circadian clock that enables them to coordinate internal biological events with external daily changes. Recent studies in Arabidopsis revealed that tissue specific clock components exist and that the clock network architecture also varies within different organs. These findings indicate that the makeup of circadian clock(s) within a plant is quite variable. Plants utilize the circadian clock to measure day-length changes for regulating seasonal responses, such as flowering. To ensure that flowering occurs under optimum conditions, the clock regulates diurnal CONSTANS (CO) expression. Subsequently, CO protein induces FLOWERING LOCUS T (FT) expression which leads to flowering. It is emerging that both CO and FT expression are intricately controlled by groups of transcription factors with overlapping functions.
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