Phyllotaxis And Symmetry In Angiosperms

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Phyllotaxis And Symmetry In Angiosperms

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Author : Jean-Paul Walch
language : en
Publisher: John Wiley & Sons
Release Date : 2024-08-27

Phyllotaxis And Symmetry In Angiosperms written by Jean-Paul Walch and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-08-27 with Science categories.

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.

Phyllotaxis And Symmetry In Angiosperms

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Author : Jean-Paul Walch
language : en
Publisher: John Wiley & Sons
Release Date : 2024-07-24

Phyllotaxis And Symmetry In Angiosperms written by Jean-Paul Walch and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-07-24 with Science categories.

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.

Phylogeny And Evolution Of The Angiosperms

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Author : Douglas Soltis
language : en
Publisher: University of Chicago Press
Release Date : 2018-01-24

Phylogeny And Evolution Of The Angiosperms written by Douglas Soltis and has been published by University of Chicago Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-01-24 with Science categories.

Although they are relative latecomers on the evolutionary scene, having emerged only 135?170 million years ago, angiosperms—or flowering plants—are the most diverse and species-rich group of seed-producing land plants, comprising more than 15,000 genera and over 350,000 species. Not only are they a model group for studying the patterns and processes of evolutionary diversification, they also play major roles in our economy, diet, and courtship rituals, producing our fruits, legumes, and grains, not to mention the flowers in our Valentine’s bouquets. They are also crucial ecologically, dominating most terrestrial and some aquatic landscapes. This fully revised edition of Phylogeny and Evolution of the Angiosperms provides an up-to-date, comprehensive overview of the evolution of and relationships among these vital plants. Incorporating molecular phylogenetics with morphological, chemical, developmental, and paleobotanical data, as well as presenting a more detailed account of early angiosperm fossils and important fossil information for each evolutionary branch of the angiosperms, the new edition integrates fossil evidence into a robust phylogenetic framework. Featuring a wealth of new color images, this highly synthetic work further reevaluates long-held evolutionary hypotheses related to flowering plants and will be an essential reference for botanists, plant systematists, and evolutionary biologists alike.

Phyllotaxis Models

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Author : Jean-Paul Walch
language : en
Publisher: John Wiley & Sons
Release Date : 2023-07-13

Phyllotaxis Models written by Jean-Paul Walch and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-07-13 with Science categories.

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.

Symmetry In Plants

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Author : Denis Barabe
language : en
Publisher: World Scientific
Release Date : 1998-03-26

Symmetry In Plants written by Denis Barabe and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-03-26 with Science categories.

The book deals with biological, mathematical, descriptive, causal and systemic phyllotaxis. It aims at reflecting the widest possible range of ideas and research closely related to phyllotaxis and contains 30 well illustrated chapters.The book has three parts of equal importance. The first two parts concern data collecting, pattern recognition and pattern generation to which students of phyllotaxis are well accustomed. The third part is devoted to the problem of origins of phyllotactic patterns, giving the field of phyllotaxis the universality it requires to be fully understood.Phyllotaxis-like patterns are found in places where genes are not necessarily present. Part III concerns general comparative morphology, homologies with phyllotactic patterns, and recent trends on evolution that can help to understand phyllotaxis.The distinguished researchers who accepted to participate in the production of this book, strongly contributed to the field of phyllotaxis in the past and have devoted a lot of their time to the fascinating subject coming up with most valuable findings, or are newcomers with original ideas that may be very relevant for the future of the field. The book summarizes and updates their contributions, and promotes new avenues in the treatment of phyllotaxis.This book on mathematical and biological phyllotaxis is the first collective book ever. A landmark in the history of phyllotaxis.

Phyllotactic Patterns A Multidisciplinary Approach

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Author : Denis Barabe
language : en
Publisher: World Scientific
Release Date : 2020-04-22

Phyllotactic Patterns A Multidisciplinary Approach written by Denis Barabe and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-22 with Science categories.

The book provides a current review of the field of phyllotaxis from a variety of perspectives, that is, morphological, developmental, biochemical, molecular genetics, biophysical, and evolutionary.This unique book covers phyllotactic processes from the level of genes involved in the establishment of patterns to modeling the emergence of those patterns in space and time. The models in question (deterministic or stochastic) touch on various fields, including geometry, biochemistry, and biophysics.Not only providing a recent review but also current critique and analysis of the discipline, the book will appeal to a variety of individuals involved in developmental modeling as well as pattern initiation and formation. The text is highly illustrated with excellent pictures representing recent developments in the field.A biological context or perspective to models and ideas is explored in the book. Terminology specific to the discipline is defined and updated as well.

On The Relation Of Phyllotaxis To Mechanical Laws

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Author : Arthur Harry Church
language : en
Publisher:
Release Date : 1904

On The Relation Of Phyllotaxis To Mechanical Laws written by Arthur Harry Church and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1904 with Growth (Plants) categories.

Understanding Plant Anatomy

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Author : S.r. Mishra
language : en
Publisher: Discovery Publishing House
Release Date : 2009

Understanding Plant Anatomy written by S.r. Mishra and has been published by Discovery Publishing House this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Plant anatomy categories.

Floral Diagrams

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Author : Louis P. Ronse De Craene
language : en
Publisher: Cambridge University Press
Release Date : 2022-04-07

Floral Diagrams written by Louis P. Ronse De Craene and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-04-07 with Art categories.

Floral diagrams are detailed two-dimensional drawings of floral structures and a tool to explain floral diversity and angiosperm evolution.

Developmental Genetics Of The Flower

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Author :
language : en
Publisher: Elsevier
Release Date : 2006-09-29

Developmental Genetics Of The Flower written by and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-09-29 with Science categories.

Current major interests in this area include the study of higher level phylogenetic relationships and character evolution in the angiosperms, floral evolution, the genetic basis of key floral differences in basal angiosperms, the genetic and genomic consequences of polyploid speciation, conservation genetics of rare plant species, and phylogeography. Developmental Genetics of the Flower provides a series of papers focused on the developmental genetics of flowering as well as the genetic control of the timing of flowering. Investigation of speciational mechanisms, evolutionary relationships, and character evolution in flowering plants and land plants utilizing a variety of experimental approaches are discussed. The chapters are excellent reviews of the current fast-moving area of research. - Provides a brief review of genes known to regulate flower development - Articles emphasize the classic ABC model of flower development