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The physiology of circadian rhythms in plants
Article first published online: 17 OCT 2003
DOI: 10.1046/j.1469-8137.2003.00895.x
Additional Information
How to Cite
Webb, A. A. R. (2003), The physiology of circadian rhythms in plants. New Phytologist, 160: 281–303. doi: 10.1046/j.1469-8137.2003.00895.x
Publication History
- Issue published online: 17 OCT 2003
- Article first published online: 17 OCT 2003
- Received: 17 March 2003 Accepted: 30 June 2003; doi: 10.1046/j.1469-8137.2003.00895.x
- Abstract
- Article
- References
- Cited By
Keywords:
- Circadian;
- stomata;
- calcium;
- signalling;
- Arabidopsis;
- leaf movements;
- growth;
- aequorin;
- phototransduction
Contents
Summary
- I. Introduction
- II. The circadian clock
- III. The regulation of cellular physiology by circadian oscillations in cytosolic free Ca2+.
- IV. The circadian regulation of physiology
- V. The benefits of the circadian regulation of physiology
- VI. Future prospects
- VII. Conclusions
Acknowledgements
References
Summary
Circadian rhythms regulate many aspects of plant physiology including leaf, organ and stomatal movements, growth and signalling. The genetic identity of some of the components of the core circadian oscillator has recently become known. Similarly, the photoperception and phototransduction pathways that entrain the oscillator to the day and night cycle are being determined. Less clear are the pathways by which the circadian oscillator regulates cellular physiology. Circadian oscillations in cytosolic free calcium might act to transduce the temporal outputs of the circadian oscillator. This hypothesis requires rigorous testing using novel noninvasive technologies. Plants might gain advantage from the circadian clock by being able to predict changes in the environment and coordinate physiological processes, presumably increasing survival and hence, reproductive fitness. Technical advances coupled with cell-specific measurement techniques will allow the advantages of the circadian regulation of physiology to be quantified.