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The Molecular Organography of Plants$
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Quentin Cronk

Print publication date: 2009

Print ISBN-13: 9780199550357

Published to Oxford Scholarship Online: May 2009

DOI: 10.1093/acprof:oso/9780199550357.001.1

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The Organography of Stems

The Organography of Stems

Chapter:
(p.22) CHAPTER 2 The Organography of Stems
Source:
The Molecular Organography of Plants
Author(s):

Quentin Cronk

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199550357.003.0002

This chapter surveys the history of the radially-organized stem from the relatively disorganized thallus of early land plants, to dichotomizing axes of primitive vascular plants, and finally to the massive, secondarily-thickened stems of seed plants such as those of Sequoia, which may rise over 100 metres above the ground. The mechanisms of stem growth by apical meristems in a variety of plants and the genes controlling shoot apical meristem function in flowering plants such as WUSCHEL, CLAVATA, and KNOTTED-LIKE HOMEOBOX genes (Knox) are discussed in an evolutionary context.

Keywords:   stem, axes, primitive vascular plants, seed plants, Sequoia, meristems, WUSCHEL, CLAVATA, KNOX

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