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Chromatin Dynamics and Transcriptional Control of Circadian Rhythms in Arabidopsis

by Aida Maric 1 and Paloma Mas 1,2,*
Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra, 08193 Barcelona, Spain
Consejo Superior de Investigaciones Científicas (CSIC), 08028 Barcelona, Spain
Author to whom correspondence should be addressed.
Genes 2020, 11(10), 1170;
Received: 10 September 2020 / Revised: 1 October 2020 / Accepted: 4 October 2020 / Published: 6 October 2020
(This article belongs to the Special Issue Molecular Mechanisms of Circadian Clock Function in Plants)
Circadian rhythms pervade nearly all aspects of plant growth, physiology, and development. Generation of the rhythms relies on an endogenous timing system or circadian clock that generates 24-h oscillations in multiple rhythmic outputs. At its bases, the plant circadian function relies on dynamic interactive networks of clock components that regulate each other to generate rhythms at specific phases during the day and night. From the initial discovery more than 13 years ago of a parallelism between the oscillations in chromatin status and the transcriptional rhythms of an Arabidopsis clock gene, a number of studies have later expanded considerably our view on the circadian epigenome and transcriptome landscapes. Here, we describe the most recent identification of chromatin-related factors that are able to directly interact with Arabidopsis clock proteins to shape the transcriptional waveforms of circadian gene expression and clock outputs. We discuss how changes in chromatin marks associate with transcript initiation, elongation, and the rhythms of nascent RNAs, and speculate on future interesting research directions in the field. View Full-Text
Keywords: Arabidopsis; circadian clock; chromatin; transcriptional rhythms Arabidopsis; circadian clock; chromatin; transcriptional rhythms
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Maric, A.; Mas, P. Chromatin Dynamics and Transcriptional Control of Circadian Rhythms in Arabidopsis. Genes 2020, 11, 1170.

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