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Articles

Diffusion Mechanism for Phyllotaxis

Theoretical Physico-Chemical and Computer Study

Theoretical Biology Group, University of Utrecht, Padualaan 8, Utrecht, The Netherlands

The mechanism for leaf position determination by the diffusion of an inhibitor has been studied in relation to the geometry of leaf positions. A computer model has been constructed for the inhibitor-diffusion process on a cellular cylindrical surface. The behavior of the model has been analyzed mathematically. The main results are: (a) that our model generates most of the phyllotactic patterns observed in nature; and (b) that restraints have been found for permissible values of diffusion rates and decay rates of the hypothetical inhibitor.

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