DOI: 10.1073/pnas.192365599. Floral responses to photoperiod are correlated with the timing of rhythmic expression relative to dawn and dusk in<i>Arabidopsis</i>

Floral responses to photoperiod are correlated with the timing of rhythmic expression relative to dawn and dusk inArabidopsis

10.1073/pnas.192365599

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

Daylength, or photoperiod, is perceived as a seasonal signal for the control of flowering of many plants. The measurement of daylength is thought to be mediated through the interaction of phototransduction pathways with a circadian rhythm, so that flowering is induced (in long-day plants) or repressed (in short-day plants) when light coincides with a sensitive phase of the circadian cycle. To test this hypothesis in the facultative long-day plant,Arabidopsis thaliana, we used varying, non-24-hr light/dark cycles to alter the timing of circadian rhythms of gene expression relative to dawn and dusk. Effects on circadian rhythms were correlated with those on flowering times. We show that conditions that displaced subjective night events, such as expression of the flowering time regulatorCONSTANSinto the light portion of the cycle, were perceived as longer days. This work demonstrates that the perception of daylength inArabidopsisrelies on adjustments of the phase angle of circadian rhythms relative to the light/dark cycle, rather than on the measurement of the absolute duration of light and darkness.

Bibliography

Roden, L. C., Song, H.-R., Jackson, S., Morris, K., & Carre, I. A. (2002). Floral responses to photoperiod are correlated with the timing of rhythmic expression relative to dawn and dusk inArabidopsis. Proceedings of the National Academy of Sciences, 99(20), 13313â13318.

Authors 5

Laura C. Roden (first)
Hae-Ryong Song (additional)
Stephen Jackson (additional)
Karl Morris (additional)
Isabelle A. Carre (additional)

References 32 Referenced 98

10.1086/334903
B Thomas, D Vince-Prue Photoperiodism in Plants (Academic, San Diego, 1997). / Photoperiodism in Plants by Thomas B (1997)
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10.1111/j.1365-3040.1995.tb00201.x
B K Follett, V M King, S L Meddle Biological Rhythms and Photoperiodism in Plants, eds P J Lumsden, A J Millar (BIOS Scientific Publishers, Oxford), pp. 231–242 (1998). / Biological Rhythms and Photoperiodism in Plants by Follett B K (1998)
E Bünning Ber Deutsch Bot Ges 54, 590–607 (1936). (10.1111/j.1438-8677.1937.tb01941.x) / Ber Deutsch Bot Ges by Bünning E (1936)
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10.1038/ng767

Dates

Type	When
Created	22 years, 10 months ago (Oct. 1, 2002, 12:58 p.m.)
Deposited	1 year, 7 months ago (Jan. 6, 2024, 11:46 p.m.)
Indexed	3 weeks, 6 days ago (Aug. 5, 2025, 9 a.m.)
Issued	22 years, 11 months ago (Sept. 23, 2002)
Published	22 years, 11 months ago (Sept. 23, 2002)
Published Online	22 years, 11 months ago (Sept. 23, 2002)
Published Print	22 years, 11 months ago (Oct. 1, 2002)

Funders 0

None

BibTeX

@article{Roden_2002, title={Floral responses to photoperiod are correlated with the timing of rhythmic expression relative to dawn and dusk inArabidopsis}, volume={99}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.192365599}, DOI={10.1073/pnas.192365599}, number={20}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Roden, Laura C. and Song, Hae-Ryong and Jackson, Stephen and Morris, Karl and Carre, Isabelle A.}, year={2002}, month=sep, pages={13313–13318} }

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