Phyllotaxis Models: A Tool for Evolutionary Biologists (Biology) - Hardcover

Walch, Jean-Paul; Blaise, Solange

Hardcover

ISBN 10: 1786309130 ISBN 13: 9781786309136

Publisher: Wiley-ISTE, 2023

Synopsis

The equations of phyllotaxis were discovered by Douady and Couder: these describe the inhibition "force" generated by an incipient primordium, preventing the initiation of other primordia in its vicinity: the method that was lacking was to take into account the distance of primordia to the meristem apex over the course of its development.

With these parameters, our model integrates both biochemical "forces" (inhibition due to auxin) and mechanical forces (contact pressure). This powerful tool allows us to revisit many important notions of plant biology.

For example, we model auxin concentrations at the plant apex, as well as the development of vegetative and reproductive meristems. We also explain why the whorls of monocots are trimerous and those of plants with quincuncial perianths are pentamerous. We design a geometric method for reconstructing inflorescences from their building blocks, i.e. floral meristems.

We also show that phyllotaxic spirals are only the application of a general property of symmetry, the advantages of which have been exploited by natural selection.

About this title

About the Author

Jean-Paul Walch is a former computer scientist for large French companies in the oil and electricity distribution sectors.

Solange Blaise is a former Associate Professor at Université Paris-Sud, Laboratoire Écologie, Systématique et Évolution, France.

Edition details

• Publisher: Wiley-ISTE
• Publication date: 2023
• Language: English
• ISBN 10: 1786309130
• ISBN 13: 9781786309136
• Binding: Hardcover
• Edition number: 1
• Number of pages: 224