Circadian clock in plants: Linking timing to fitness.
Xiaodong XuLi YuanXin YangXiao ZhangLei WangQiguang XiePublished in: Journal of integrative plant biology (2022)
Endogenous circadian clock integrates cyclic signals of environment and daily and seasonal behaviors of organisms to achieve spatiotemporal synchronization, which greatly improves genetic diversity and fitness of species. This review addresses recent studies on the plant circadian system in the field of chronobiology, covering topics on molecular mechanisms, internal and external Zeitgebers, and hierarchical regulation of physiological outputs. The architecture of the circadian clock involves the autoregulatory transcriptional feedback loops, post-translational modifications of core oscillators, and epigenetic modifications of DNA and histones. Here, light, temperature, humidity, and internal elemental nutrients are summarized to illustrate the sensitivity of the circadian clock to timing cues. In addition, the circadian clock runs cell-autonomously, driving independent circadian rhythms in various tissues. The core oscillators responds to each other with biochemical factors including calcium ions, mineral nutrients, photosynthetic products, and hormones. We describe clock components sequentially expressed during a 24-h day that regulate rhythmic growth, aging, immune response, and resistance to biotic and abiotic stresses. Notably, more data have suggested the circadian clock links chrono-culture to key agronomic traits in crops.
Keyphrases
- genetic diversity
- physical activity
- gene expression
- immune response
- body composition
- heavy metals
- dna methylation
- single cell
- circulating tumor
- cell therapy
- genome wide
- electronic health record
- cell free
- single molecule
- transcription factor
- quantum dots
- big data
- dendritic cells
- stem cells
- gram negative
- case control
- toll like receptor
- risk assessment
- inflammatory response
- artificial intelligence
- deep learning
- arabidopsis thaliana
- nucleic acid
- cell wall
- machine learning
- circulating tumor cells