Phyllotaxis and Symmetry in Angiosperms

Released on by Jean-Paul Walch
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  • Phyllotaxis and Symmetry in Angiosperms Book Detail

  • Author : Jean-Paul Walch
  • Release Date : 2024-07-24
  • Publisher : John Wiley & Sons
  • Genre : Science
  • Pages : 260
  • ISBN 13 : 1394306342
  • File Size : 27,27 MB
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Phyllotaxis and Symmetry in Angiosperms by Jean-Paul Walch PDF Summary

Book Description: Symmetry and the causes of shifts in different types of symmetries in flowers follow specific patterns that are ruled by developmental and genetic factors. Using a unified system of phyllotaxic equations, we have modeled the molecular mechanisms and pressure forces that act in inflorescence and floral meristems, giving flowers their organ arrangement. In this book, we state general physical principles, whereby the symmetry of the perianth is derived from the symmetry of certain TCP gene expression. Thus, we define the interplay between the expression of CYC2-like genes and the phyllotactic mechanisms. This new evo-devo approach is applied to major groups of angiosperms with predominantly actinomorphic flowers (in which rare zygomorphy is positional) and groups with mainly bilaterally symmetrical flowers (in which zygomorphy is constitutional). It has thus allowed us to revisit the contributions of the great floral morphologists of the 20th and early 21st centuries.

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Phyllotaxis and Symmetry in Angiosperms

Phyllotaxis and Symmetry in Angiosperms

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Symmetry and the causes of shifts in different types of symmetries in flowers follow specific patterns that are ruled by developmental and genetic factors. Usin

Symmetry in Plants

Symmetry in Plants

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The book deals with biological, mathematical, descriptive, causal and systemic phyllotaxis. It aims at reflecting the widest possible range of ideas and researc

Phyllotaxis and Symmetry in Angiosperms

Phyllotaxis and Symmetry in Angiosperms

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Symmetry and the causes of shifts in different types of symmetries in flowers follow specific patterns that are ruled by developmental and genetic factors. Usin

Phyllotaxis Models

Phyllotaxis Models

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The equations of phyllotaxis were discovered by Douady and Couder: these describe the inhibition "force" generated by an incipient primordium, preventing the in