✦ LIBER ✦

The Constraints of Global Form on Phyllotactic Organization: the Case ofSymplocarpus(Araceae)

✍ Scribed by Denis Barabé; Roger V. Jean

Publisher: Elsevier Science
Year: 1996
Tongue: English
Weight: 736 KB
Volume: 178
Category: Article
ISSN: 0022-5193
DOI: 10.1006/jtbi.1996.0036

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✦ Synopsis

The present paper describes a formal analysis of the constraints imposed by a change of global form on the phyllotactic organization in the inflorescence of Symplocarpus. By combining a dynamic model of phyllotaxis with a general model of allometric growth, we show that as the length-to-width ratio of the inflorescence increases, then the number of parastichies decreases while the plastochrone ratio increases. Subsequent observations prove that these theoretical conclusions emerging from the analysis of the global form of Symplocarpus are exact. Our analysis offers experimentalists the possibility of verifying the existence of particular allometric relationships in the different phases of development of Symplocarpus and related species.

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