PMID: 11607411Jul 1, 1993Paper

The circadian oscillator is regulated by a very low fluence response of phytochrome in wheat

Proceedings of the National Academy of Sciences of the United States of America
F NagyE Schäfer

Abstract

Expression of genes encoding the light-harvesting chlorophyll a/b binding proteins of photosystem II (Cab) in etiolated wheat seedlings is controlled by phytochrome and a circadian clock. Even photoconversion of <1% of phytochrome to its active form, which can be achieved by moonlight, induces the expression of the Cab genes, particularly that of the Cab-1 gene, in circadian fashion. Thus, this reaction shows the characteristics of a low and a very low fluence response. A single far-red light pulse given to an etiolated seedling is sufficient for a persistence of the circadian oscillation of the Cab-1 mRNA level for at least 100 h. Subsequent red (R) or long-wavelength far-red (RG9) light irradiations alter the free running rhythm. These observations indicate a change in sensitivity to phytochrome and/or a control by stable phytochrome. The latter hypothesis is supported by the observation that the level of Cab-1 mRNA is increased or decreased by a second R or RG9 light pulse, respectively.

References

Aug 15, 1992·Proceedings of the National Academy of Sciences of the United States of America·J A Brusslan, E M Tobin
Jan 1, 1989·Advances in Biophysics·M Furuya
Feb 1, 1988·Trends in Genetics : TIG·F NagyN H Chua

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Citations

Aug 6, 2000·The Plant Journal : for Cell and Molecular Biology·M J YanovskyJ J Casal
Aug 8, 2001·The Plant Journal : for Cell and Molecular Biology·N SugiyamaK Shimamoto
Jun 1, 1996·Annual Review of Plant Physiology and Plant Molecular Biology·Albrecht Von Arnim, Xing-Wang Deng
May 5, 2001·Annual Review of Plant Physiology and Plant Molecular Biology·C Robertson McClung
Feb 22, 2001·Annual Review of Physiology·C H Johnson
Jan 1, 2002·The Arabidopsis Book·C Robertson McClungTodd P Michael
Dec 24, 1996·Proceedings of the National Academy of Sciences of the United States of America·A J Millar, S A Kay
Dec 24, 2014·Biotechnology Advances·Mayank Anand GururaniPill-Soon Song
Nov 1, 1996·Chronobiology International·J Beator, K Kloppstech
Aug 14, 2001·Plant Physiology·S Christensen, J Silverthorne

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