Circadian coordination of cellular processes and abiotic stress responses

• Published in: Current opinion in plant biology Vol. 64; p. 102133
• Main Authors: Bonnot, Titouan, Blair, Emily J., Cordingley, Samantha J., Nagel, Dawn H.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.12.2021
• Subjects: Arabidopsis - metabolism; Arabidopsis Proteins - metabolism; Biological Phenomena; Circadian Clocks - genetics; Circadian Rhythm - genetics; Gene Expression Regulation, Plant; Stress, Physiological
• ISSN: 1369-5266; 1879-0356
• DOI: 10.1016/j.pbi.2021.102133

Diel changes in the environment are perceived by the circadian clock which transmits temporal information throughout the plant cell to synchronize daily and seasonal environmental signals with internal biological processes. Dynamic modulations of diverse levels of clock gene regulation within the plant cell are impacted by stress. Recent insights into circadian control of cellular processes such as alternative splicing, polyadenylation, and noncoding RNAs are discussed. We highlight studies on the circadian regulation of reactive oxygen species, calcium signaling, and gating of temperature stress responses. Finally, we briefly summarize recent work on the translation-specific rhythmicity of cell cycle genes and the control of subcellular localization and relocalization of oscillator components. Together, this mini-review highlights these cellular events in the context of clock gene regulation and stress responses in Arabidopsis. •Circadian regulation operates at multiple levels.•Cell cycle genes show intriguing-specific rhythmicity at the translational level.•Reactive oxygen species and Ca2+ signaling can modulate circadian parameters.•Both time of day and the circadian clock contribute to temperature stress responses.•Clock protein localization dynamically changes in response to abiotic stress.