1. COR27 and COR28 encode nighttime repressors integrating Arabidopsis circadian clock and cold response.
- Author
-
Wang, Peng, Cui, Xuan, Zhao, Chunsheng, Shi, Liyan, Zhang, Guowei, Sun, Fenglong, Cao, Xiaofeng, Yuan, Li, Xie, Qiguang, and Xu, Xiaodong
- Subjects
CIRCADIAN rhythms ,EFFECT of cold on plants ,ARABIDOPSIS thaliana genetics ,PROMOTERS (Genetics) ,PLANT genomes ,PLANTS - Abstract
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. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF