Phytochrome-hormonal signalling networks

Authors: Halliday K.J.¹; Fankhauser C.²

Source: New Phytologist, Volume 157, Number 3, March 2003 , pp. 449-463(15)

Publisher: Wiley-Blackwell

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Abstract:

Contents

• Summary 449

• Introduction 449

• The phytochrome protein 450

• Bacteriophytochromes 450

• I Bacteriophytochrome signalling 450

• Plant phytochrome signalling 451

• Ethylene perception and signalling 451

• Cytokinin perception and signalling 452

• Brassinosteroid perception and signalling 453

• Gibberellin signalling 455

• Auxin signalling 456

• Proteolysis in light and hormonal signalling 458

• Conclusion 459

• Acknowledgements 459

• References 459

Summary Through time, plants have evolved an extraordinary ability to interpret environmental cues. One of the most reliable of these cues is light, and plants are particularly adept at sensing and translating environmental light signals. The phytochrome family of photoreceptors monitor cues such as daylength or vegetative shade and adjust development to reflect change in these parameters. Indeed, it is their ability to coordinate these complex developmental changes that underpins the remarkable success of plants. Evidence is mounting that hormones control many of these light-mediated changes. Therefore, if we are to understand how light manipulates development we need to explore the interplay between light and hormonal signalling. Toward this goal, this review highlights the known convergence points of the phytochrome and the hormonal networks and explores their interactions.

Keywords: Arabidopsis; hormones; auxin; brassinosteroid; cytokinin; gibberellin; GA; ethylene

Document Type: Research article

DOI: http://dx.doi.org/10.1046/j.1469-8137.2003.00689.x

Affiliations: 1: School of Biological Sciences, University of Bristol, Woodland Road, Bristol BS8 1UG, UK; 2: Department of Molecular Biology, Université de Genève, 30 quai E. Ansermet, CH-1211 Geneva 4, Switzerland

Publication date: 2003-03-01