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Understanding Flowers and Flowering, Second Edition$
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Beverley Glover

Print publication date: 2014

Print ISBN-13: 9780199661596

Published to Oxford Scholarship Online: April 2014

DOI: 10.1093/acprof:oso/9780199661596.001.0001

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The vernalization pathway of floral induction and the role of gibberellin

The vernalization pathway of floral induction and the role of gibberellin

(p.63) Chapter 6 The vernalization pathway of floral induction and the role of gibberellin
Understanding Flowers and Flowering, Second Edition

Beverley Glover

Oxford University Press

Day length is not the only environmental signal used by plants to optimize the timing of flower production. Temperature is also a factor, and particularly vernalization, exposure to a prolonged period of cold. This is a sensible adaptation of plants in temperate climates to prevent the risk of autumn germination leading to flowering in winter, a time when pollinators are scarce and freezing temperatures may inhibit seed production. At the same time, the plant growth regulator gibberellin has been shown to be a powerful promoter of flowering in many species. Since gibberellins are produced by differentiating plastids, linking flowering to high gibberellin levels allows plants to coordinate reproduction with the potential for high levels of photosynthetic activity. In this chapter the two pathways are considered separately, before an analysis of the evidence that they overlap.

Keywords:   FLC, FRI, Gibberellin, LEAFY, Vernalization, VIN3, VRN1, VRN2

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