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Science 27 February 1998:
Vol. 279. no. 5355, pp. 1360 - 1363
DOI: 10.1126/science.279.5355.1360
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Reports

Regulation of Flowering Time by Arabidopsis Photoreceptors

Hongwei Guo, * Hongyun Yang, * Todd C. Mockler, Chentao Lin dagger

The shift in plants from vegetative growth to floral development is regulated by red-far-red light receptors (phytochromes) and blue-ultraviolet A light receptors (cryptochromes). A mutation in the Arabidopsis thaliana CRY2 gene encoding a blue-light receptor apoprotein (CRY2) is allelic to the late-flowering mutant, fha. Flowering in cry2/fha mutant plants is only incompletely responsive to photoperiod. Cryptochrome 2 (cry2) is a positive regulator of the flowering-time gene CO, the expression of which is regulated by photoperiod. Analysis of flowering in cry2 and phyB mutants in response to different wavelengths of light indicated that flowering is regulated by the antagonistic actions of phyB and cry2.

Department of Molecular, Cell and Developmental Biology, and Molecular Biology Institute, University of California, Los Angeles, CA 90095, USA.
*   These authors contributed equally to this work.

dagger    To whom correspondence should be addressed. E-mail: clin{at}mcdb.ucla.edu

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Photolyase/Cryptochrome Family Blue-light Photoreceptors Use Light Energy to Repair DNA or Set the Circadian Clock.
A. SANCAR, C. THOMPSON, R.J. THRESHER, F. ARAUJO, J. MO, S. OZGUR, E. VAGAS, L. DAWUT, and C.P. SELBY (2000)
Cold Spring Harb Symp Quant Biol 65, 157-172
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Cryptochrome Nucleocytoplasmic Distribution and Gene Expression Are Regulated by Light Quality in the Fern Adiantum capillus-veneris.
T. Imaizumi, T. Kanegae, and M. Wada (2000)
PLANT CELL 12, 81-96
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A Pair of Related Genes with Antagonistic Roles in Mediating Flowering Signals.
Y. Kobayashi, H. Kaya, K. Goto, M. Iwabuchi, and T. Araki (1999)
Science 286, 1960-1962
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Stimulation of the blue light phototropic receptor NPH1 causes a transient increase in cytosolic Ca2+.
G. Baum, J. C. Long, G. I. Jenkins, and A. J. Trewavas (1999)
PNAS 96, 13554-13559
   Abstract »    Full Text »    PDF »
Independent Regulation of Flowering by Phytochrome B and Gibberellins in Arabidopsis.
M. A. Blázquez and D. Weigel (1999)
Plant Physiology 120, 1025-1032
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Science. ISSN 0036-8075 (print), 1095-9203 (online)