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Understanding Flowers and FloweringAn integrated approach$
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Beverley Glover

Print publication date: 2007

Print ISBN-13: 9780198565970

Published to Oxford Scholarship Online: January 2008

DOI: 10.1093/acprof:oso/9780198565970.001.0001

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The Photoperiodic Pathway of Floral Induction

The Photoperiodic Pathway of Floral Induction

(p.43) CHAPTER 5 The Photoperiodic Pathway of Floral Induction
Understanding Flowers and Flowering

Beverley J. Glover

Oxford University Press

Long day plants and short day plants experience photoperiodic induction of flowering, and so flower in certain daylengths. This chapter considers the photoperiodic regulation of flowering in Arabidopsis, which is a facultative long day plant (that is, one whose flowering is brought forward by long days, rather than one with an absolute requirement for them). Understanding the photoperiodic induction pathway requires an analysis of how light is perceived, how time is measured, and how the two signals are integrated to activate responses. Phytochromes and cryptochromes are necessary for light perception, an endogenous circadian clock measures time, and several proteins interact to integrate these signals.

Keywords:   Arabidopsis, circadian clock, cryptochrome, daylength, long day plants, photoperiodic induction, phytochrome, short day plants

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