The Organography of Stems

Quentin Cronk

in The Molecular Organography of Plants

Published in print January 2009 | ISBN: 9780199550357
Published online May 2009 | e-ISBN: 9780191720154 | DOI:
 The Organography of Stems

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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

Chapter.  17884 words.  Illustrated.

Subjects: Plant Sciences and Forestry

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