COR27 and COR28 encode nighttime repressors integrating Arabidopsis circadian clock and cold response

doi:10.1111/jipb.12512

J Integr Plant Biol ›› 2017, Vol. 59 ›› Issue (2): 78-85.DOI: 10.1111/jipb.12512

COR27 and COR28 encode nighttime repressors integrating Arabidopsis circadian clock and cold response

Peng Wang¹, Xuan Cui¹, Chunsheng Zhao¹, Liyan Shi¹, Guowei Zhang¹, Fenglong Sun², Xiaofeng Cao², Li Yuan¹, Qiguang Xie¹ and Xiaodong Xu^1*

收稿日期:2016-11-16 接受日期:2016-12-15 出版日期:2016-12-19 发布日期:2016-12-19

COR27 and COR28 encode nighttime repressors integrating Arabidopsis circadian clock and cold response

Peng Wang¹, Xuan Cui¹, Chunsheng Zhao¹, Liyan Shi¹, Guowei Zhang¹, Fenglong Sun², Xiaofeng Cao², Li Yuan¹, Qiguang Xie¹ and Xiaodong Xu^1*

¹Hebei 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, China
²State Key Laboratory of Plant Genomics and National Center for Plant Gene Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China

Received:2016-11-16 Accepted:2016-12-15 Online:2016-12-19 Published:2016-12-19
About author:^*Correspondence: E-mail: Xiaodong Xu (xiaodong.xu@hebtu.edu.cn)

摘要/Abstract

摘要： COR27 and COR28 repress the transcription of evening-phased clock genes and cold-responsive genes, which is responsible for maintaining circadian rhythm, plant freezing tolerance and flowering time control. CCA1 directly regulates COR27 and COR28 rhythmic expression in a temperature-dependent manner. This indicates the essential roles of COR27 and COR28 in coordinating circadian clock and cold-stress signaling networks.

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.

Peng Wang, Xuan Cui, Chunsheng Zhao, Liyan Shi, Guowei Zhang, Fenglong Sun, Xiaofeng Cao, Li Yuan, Qiguang Xie, and Xiaodong Xu. COR27 and COR28 encode nighttime repressors integrating Arabidopsis circadian clock and cold response[J]. J Integr Plant Biol, 2017, 59(2): 78-85.

COR27 and COR28 encode nighttime repressors integrating Arabidopsis circadian clock and cold response

COR27 and COR28 encode nighttime repressors integrating Arabidopsis circadian clock and cold response

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