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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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Changing Floral Shape and Structure

Changing Floral Shape and Structure

(p.138) CHAPTER 14 Changing Floral Shape and Structure
Understanding Flowers and Flowering

Beverley J. Glover

Oxford University Press

This book has previously discussed the ABC model of flower development and the molecular changes that occur to generate the correct numbers and arrangements of the four whorls of floral organs. This chapter starts with a basic flower, such as the flower of Arabidopsis, and considers the ways in which its form can be altered by known developmental programmes. The chapter then focusses on the petals or corolla, as the whorl of organs of primary importance in attracting potential pollinators, and considers changes to its size, its symmetry (zygomorphy versus actinomorphy), the shape of its component petals, and its position within an inflorescence. The chapter also looks at the development of specialized features such as nectar spurs and landing platforms.

Keywords:   inflorescence, landing platforms, nectar spurs, petals, symmetry, zygomorphy

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