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Input signals to the plant circadian clock

Input signals to the plant circadian clock,Andrew J. Millar

Input signals to the plant circadian clock   (Citations: 38)
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Eukaryotes and some prokaryotes have adapted to the 24 h day/night cycle by evolving circadian clocks, which now control very many aspects of metabolism, physiology and behaviour. Circadian clocks in plants are entrained by light and temperature signals from the environment. The relative timing of internal and external events depends upon a complex interplay of interacting rhythmic controls and environmental signals, including changes in the period of the clock. Several of the phytochrome and cryptochrome photo- receptors responsible have been identified. This review concentrates on the resulting patterns of entrainment and on the multiple proposed mechan- isms of light input to the circadian oscillator components.
Published in 2004.
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    • ...The circadian clock can be also entrained by temperature cycles according to the temperature difference between daytime and nighttime (Alonso et al., 2003; Devlin, 2002; Millar, 2004)...

    Seung Kwan Yooet al. A genetic screen for leaf movement mutants identifies a potential role...

    • ...Many of the data sets used in our analysis reflect regulation under constant light or in light:dark cycles, where the lights-on and lights-off signals at dawn and dusk both participate in entraining the Arabidopsis clock ...

    Treenut Saithonget al. Consistent Robustness Analysis (CRA) Identifies Biologically Relevant ...

    • ...CCA1 in 1.3 plants did not override the light-induction pathway of LHY and TOC1, allowing rhythmic expression of both genes, indicating the complexity of the Arabidopsis central oscillator, including multiple input pathways from photoreceptors and involvement of additional regulators (Gardner et al. 2006; McClung 2006; Millar 2004; Ueda 2006; Pruneda-Paz et al. 2009)...
    • ...Many candidates have been proposed, with several different light-input pathways having been suggested (Gardner et al. 2006; Kevei et al. 2006; Kim et al. 2003a, b; McClung, 2006; Millar 2004)...
    • ...While both red-light-sensing phytochromes (PHYs) and blue-light-sensing cryptochromes (CRYs) contribute to light input to the clock (Devlin 2002;El-Assal et al. 2001), they also contribute to rhythmic outputs of the clock, with all PHYs and CRYs exhibiting circadian oscillations (Harmer et al. 2000; Millar 2004)...
    • ...While both red-light-sensing phytochromes (PHYs) and blue-light-sensing cryptochromes (CRYs) contribute to light input to the clock (Devlin 2002;El-Assal et al. 2001), they also contribute to rhythmic outputs of the clock, with all PHYs and CRYs exhibiting circadian oscillations (Harmer et al. 2000; Millar 2004)...
    • ...It is becoming increasingly apparent, as attempts are made to unravel the interface between light-input signals and the central oscillator of the circadian clock, that a number of different clock-associated genes are induced separately by light (Kim et al. 2003a, b; Millar 2004)...

    Alona Ovadiaet al. The 5′UTR of CCA1 includes an autoregulatory cis element that segregat...

    • ...The phase of the circadian clock is adjusted to match the day/night cycle by entrainment through the phytochromes and cryptochromes (Millar 2004; Salome ´ and McClung 2005)...

    Fiona C. Robertsonet al. Interactions between circadian and hormonal signalling in plants

    • ...While oscillations in gene expression derived from the Arabidopsis circadian clock can be detected in seedlings germinated in the absence of environmental cues beyond inbibition of seed (Zhong et al. 1998; Salome et al. 2008), the circadian circuitry is capable of being entrained by stimuli such as light and temperature (Fankhauser and Staiger 2002; Cashmore 2003; Panda et al. 2003; Millar 2004)...

    Matthew A. Jones. Entrainment of the Arabidopsis Circadian Clock

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