COR27 和 COR28 编码夜间抑制因子，整合拟南芥生物钟和冷响应。
COR27 and COR28 encode nighttime repressors integrating Arabidopsis circadian clock and cold response.
机构信息
Hebei Key Laboratory of Molecular and Cellular Biology, Key Laboratory of Molecular and Cellular Biology of Ministry of Education, College of Life Sciences, Hebei Normal University; Hebei Collaboration Innovation Center for Cell Signaling, Shijiazhuang, 050024, China.
State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, 100101, China.
出版信息
J Integr Plant Biol. 2017 Feb;59(2):78-85. doi: 10.1111/jipb.12512.
It was noted that circadian components function in plant adaptation to diurnal temperature cycles and freezing tolerance. Our genome-wide transcriptome analysis revealed that evening-phased COR27 and COR28 mainly repress the transcription of clock-associated evening genes PRR5, ELF4 and cold-responsive genes. Chromatin immunoprecipitation indicated that CCA1 is recruited to the site containing EE elements of COR27 and COR28 promoters in a temperature-dependent way. Further genetic analysis shows COR28 is essential for the circadian function of PRR9 and PRR7. Together, our results support a role of COR27 and COR28 as nighttime repressors integrating circadian clock and plant cold stress responses.
研究表明，生物钟组件在植物适应昼夜温度循环和抗冻性方面发挥作用。我们的全基因组转录组分析显示，傍晚型 COR27 和 COR28 主要抑制与生物钟相关的傍晚基因 PRR5、ELF4 和冷响应基因的转录。染色质免疫沉淀表明，CCA1 以温度依赖的方式被募集到 COR27 和 COR28 启动子中含有 EE 元件的位点。进一步的遗传分析表明，COR28 对于 PRR9 和 PRR7 的生物钟功能是必不可少的。综上所述，我们的研究结果支持 COR27 和 COR28 作为夜间抑制因子整合生物钟和植物冷应激反应的作用。
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