The physiology of circadian rhythms in plants.

@article{Webb2003ThePO,
  title={The physiology of circadian rhythms in plants.},
  author={Alex A. R. Webb},
  journal={The New phytologist},
  year={2003},
  volume={160 2},
  pages={
          281-303
        }
}
  • A. Webb
  • Published 1 November 2003
  • Medicine, Biology
  • The New phytologist
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… 
View on PubMed
research.eeescience.utoledo.edu
111 Citations
Highly Influential Citations
9
Background Citations
49
Results Citations
1

111 Citations

Citation Type

Citation Type

Regulation of output from the plant circadian clock
TLDR
The role of the circadian system in regulation at all stages of a plant's development, from germination and growth to reproductive development as well as in multiple cellular processes is described.
Modulation of environmental responses of plants by circadian clocks.
TLDR
How environmental rhythms of temperature and light intensity entrain the circadian clock, how photoperiodism may be regulated by the relationship between environmental rhythms and the phasing of clock outputs, and how gating modulates the sensitivity of the clock and other responses to environmental and physiological signals are described.
Magnesium maintains the length of the circadian period in Arabidopsis.
TLDR
Findings suggest that sufficient Mg supply is required to support proper timekeeping in plants, and it is suggested that Mg is likely to affect global transcription/translation levels rather than a single component of the circadian oscillator.
Magnesium maintains length of circadian period in Arabidopsis thaliana
TLDR
It is suggested that proper Mg supply is required to support proper timekeeping in plants and interferes with the circadian oscillator most likely through translational mechanisms.
Kernel Architecture of the Genetic Circuitry of the Arabidopsis Circadian System
TLDR
This mechanistic simulation for Arabidopsis thaliana demonstrates that at least half of the total regulatory interactions must be present to express the circadian molecular profiles observed in wild-type plants, and provides insights into a design principle of biological clockwork, with implications for synthetic biology.
Interactions Between Circadian Rhythms, ROS and Redox
TLDR
The current understanding of the relationship between the circadian system and ROS is summarized, and roles for ROS in circadian signalling between organelles and the circadian regulation of guard cell function are suggested.
The critical role of the Arabidopsis circadian clock at high temperature
TLDR
Investigation on the impact of high temperature was extended to plants with an internal clock period not matched to the external light/dark cycle, finding that the toc1-1 line performed better at high temperature when its clock period matched the environment.
Circadian clock-dependent gating in ABA signalling networks
TLDR
The basic principles and recent progress in elucidating the molecular mechanisms of circadian gating of the ABA response network are summarized and how it can affect fundamental processes in plant growth and development are summarized.
Crosstalk between the Circadian Clock and Innate Immunity in Arabidopsis
TLDR
It is shown that the defense role of CCA1 and LHY against P. syringae is at least partially through circadian control of stomatal aperture but is independent of defense mediated by salicylic acid, and crosstalk between the circadian clock and plant innate immunity is revealed for the first time.
How plants tell the time.
TLDR
The advances in determining the molecular nature of the circadian oscillator are described and an architecture of several interlocking negative-feedback loops is proposed and the adaptive advantages of circadian control, with particular reference to the regulation of metabolism, are considered.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 124 REFERENCES
Biological clocks in Arabidopsis thaliana.
  • A. Millar
  • Medicine, Biology
    The New phytologist
  • 1999
TLDR
Components of the first plant circadian output pathway to be identified unequivocally will help to determine exactly how many output pathways control the various phases of overt rhythms in plants.
Circadian Rhythms Confer a Higher Level of Fitness to Arabidopsis Plants1
TLDR
It is demonstrated that CCA1-ox plants retain the ability to respond to diurnal changes in light, and two other circadian rhythm mutants, LHY-ox and elf3, have low-viability phenotypes.
The ELF3 zeitnehmer regulates light signalling to the circadian clock
TLDR
ELF3 specifically affects light input to the oscillator, similar to its function in gating CAB activation, allowing oscillator progression past a light-sensitive phase in the subjective evening, providing experimental demonstration of the zeitnehmer (‘time-taker’) concept.
The ELF4 gene controls circadian rhythms and flowering time in Arabidopsis thaliana
TLDR
The gene EARLY FLOWERING 4 (ELF4), which is involved in photoperiod perception and circadian regulation, is described, which promotes clock accuracy and is required for sustained rhythms in the absence of daily light/dark cycles.
Endogenous timekeepers in photosynthetic organisms.
  • C. Johnson
  • Biology, Medicine
    Annual review of physiology
  • 2001
TLDR
Genes have now been isolated from plants that are likely to encode components of the central clockwork or at least that act very close to the central mechanism.
The Circadian Clock That Controls Gene Expression in Arabidopsis Is Tissue Specific1
TLDR
The proposal that spatially separated copies of the plant circadian clock are at most weakly coupled, if not functionally independent, has apparently permitted tissue-specific specialization of circadian timing is supported.
Biological rhythms and photoperiodism in plants
TLDR
A clockwork green: circadian rhythms in photosynthetic organisms, developmental processes in insects, and photoperiodism in the blow fly, calliphora vicina.
The short-period mutant, toc1-1, alters circadian clock regulation of multiple outputs throughout development in Arabidopsis thaliana.
TLDR
A new set of circadian clock-controlled phenotypes for Arabidopsis thaliana are reported, consistent with the likelihood that TOC1 codes for an oscillator component rather than for an element of an input signaling pathway, and indicate that T OC1 acts on or within the clock independently of light input.
Critical Role for CCA1 and LHY in Maintaining Circadian Rhythmicity in Arabidopsis
TLDR
It is shown that plants lacking CCA1 and with LHY function strongly reduced, cca1-1 lhy-R, are unable to maintain sustained oscillations in both constant light and constant darkness, but exhibit some circadian function in light/dark cycles, showing that the Arabidopsis circadian clock is not entirely dependent on C CA1 and LHY activities.
Circadian dysfunction causes aberrant hypocotyl elongation patterns in Arabidopsis.
TLDR
It is demonstrated that the circadian clock controls the elongation of the Arabidopsis hypocotyl immediately upon germination, indicating that it is controlled by a similar circadian system to other rhythmic markers.
...
1
2
3
4
5
...