Chapter

The Organography of the Leaf

Quentin Cronk

in The Molecular Organography of Plants

Published in print January 2009 | ISBN: 9780199550357
Published online May 2009 | e-ISBN: 9780191720154 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199550357.003.0004
 The Organography of the Leaf

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This chapter chronicles the evolution of the leaf, the essential organ of terrestrial carbon cycling. Homology between phyllidia, microphylls, and megaphylls is discussed, and leaf evolution is placed within the context of the evolution of leaf developmental networks including the ARP/KNOX regulatory module. The enormous variety of forms adopted by leaves (spines, tendrils, ascidia etc) is surveyed in a morphological and molecular context. The determination of leaf shape, lobing, marginal toothing and compound leaf form is also treated.

Keywords: thallus; phyllidia; microphylls; megaphylls; euphyllophytes; leaf evolution; compound leaves; simple leaves; KNOX genes; ARP genes

Chapter.  24992 words.  Illustrated.

Subjects: Plant Sciences and Forestry

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