Regulation of Flowering Time by Arabidopsis Photoreceptors

Author:

Guo Hongwei1,Yang Hongyun1,Mockler Todd C.1,Lin Chentao1

Affiliation:

1. Department of Molecular, Cell and Developmental Biology, and Molecular Biology Institute, University of California, Los Angeles, CA 90095, USA.

Abstract

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference44 articles.

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2. Furuya M., Schafer E., Trends Plant Sci. 1, 301 (1996);

3. von Arnim A., Deng X.-W., Annu. Rev. Plant Physiol. Plant Mol. Biol. 47, 215 (1996).

4. W. Briggs R. L. Health E. Tobin Regulation of Plant Growth and Development by Light vol. 17 of Current Topics in Plant Physiology (American Society of Plant Physiologists Rockville MD 1996).

5. Phytochromes: Photosensory Perception and Signal Transduction

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