Author: Duncan Ross DavidsonPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The Morphogenesis of Feather Primordia in Chicken Skin
Author: Duncan Ross DavidsonThe Morphogenesis of Feather Primordia in Chicken Skin
Author: Duncan Ross DavidsonMorphogenesis of Skin
Author: SengelPublisher: CUP Archive
ISBN: 9780521206440
Category : Medical
Languages : en
Pages : 296
Book Description
Morphogenesis of Skin Pattern Geometry in Birds
Author: Camille CurantzPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Natural patterns constitute one of the most diverse features observed in wild animals. The development of such patterns requires a series of morphogenetic events involving a differential response of a naïve tissue to chemical and mechanical positional cues. To what extent these processes contribute to the shape of the natural variation remains unclear. In birds, feather primordia are implanted in typical geometries which vary between birds in primordia size, spacing and pattern regularity. It has been shown that the development of the feather array surely involves self-organising processes. Such processes rely on molecular and cellular factors that cumulate and cooperate temporally and spatially in the developing skin. We showed that the patterning of feather primordia involves prior regionalisation of the skin into competent domains forming a specie-specific pre-pattern that influences the resulting pattern. The comparative description of the local variation of the feather array in these birds according to their initial competent domains shows that variation in the amplitude of dermal cell anisotropy correlates with variation in pattern regularity. Using ex vivo perturbations of skin architecture by an inhibitor of actin filament polymerisation, I showed that the anisotropy of dermal cells prior to feather primordia formation can be seen a readout of the competent state of the tissue to form a regular pattern. These results provide insights into the cellular basis of self-organisation and demonstrate that tissue morphology, constrain the cell response to the positional cues and contribute to shape the variation of the geometry of the feather array observed in nature.
Journal of Embryology and Experimental Morphology
Author: The Inductive Brain in Development and Evolution
Author: Nelson R. CabejPublisher: Academic Press
ISBN: 0323851665
Category : Science
Languages : en
Pages : 290
Book Description
The Inductive Brain in Development and Evolution provides readers with a substantial biological education on animal nervous systems and their role in the development, adaptation, homeostasis, and evolution of species. The book begins by delving into the embryonic development of the brain and then discusses epigenetic information and neural activity post-birth. It then analyzes the inductive brain’s neural and brain control of such factors like myogenesis, bone development, sensory organs, metamorphosis in vertebrates and invertebrates, and wing development in insects. The book closes with an examination of phenotypic evolution in neural control, mechanisms, and drivers of animal brains. The Inductive Brain in Development and Evolution will offer evolutionary biologists, specifically those researching development, adaptation, and evolution of animals, a comprehensive text that covers a variety of valuable topics. Presents the first book devoted to the inductive role of the brain in development, in adaptation, and in the evolution processes in animals Examines the central nervous system (CNS) from embryonic to adult life stages Provides detailed evidence to investigate the role of the CNS in molding animal morphology and life histories
The Epidermis
Author: William MontagnaPublisher: Elsevier
ISBN: 1483261670
Category : Medical
Languages : en
Pages : 670
Book Description
The Epidermis documents the proceedings of a symposium that explored in detail the fundamental aspects of the epidermis and the still poorly understood process of keratinization. The Division of Dermatology, University Extension and the School of Medicine of the University of California at Los Angeles agreed to sponsor the conference and offered the University's Residential Conference Center at Lake Arrowhead for the meeting place. This volume is a source book of basic dermatologic thought and information. More than a book of dermatology, this volume makes a singular contribution to our knowledge of keratinization. The volume contains 37 papers and opens with an introductory chapter on keratinization, focusing on the history of the keratohyalin granules, the role of lipids in the orderly keratinization of the epidermis, and the desquamation process. Subsequent chapters present studies on topics such as the behavior of the skin; the effects of various experimental conditions on keratinization in organ culture; and the localization and the regional variability in the concentration epidermal enzymes.
Epigenetic Principles of Evolution
Author: Nelson R CabejPublisher: Academic Press
ISBN: 0128140682
Category : Science
Languages : en
Pages : 854
Book Description
Epigenetic Principles of Evolution, Second Edition, fully examines the causal basis of evolution from an epigenetic point-of-view. By revealing the epigenetic uses of the genetic toolkit, this work demonstrates the primacy of epigenetic mechanisms and epigenetic information in generating evolutionary novelties. The author convincingly supports his theoretical perspective with examples from varied fields of biology, emphasizing changes in developmental pathways as the basic source of evolutionary change in metazoans. Users will find a broader view of the epigenetic mechanisms of evolution, moving beyond conventional changes in epigenetic structures, such as DNA methylation, histone modifications, and patterns of miRNA, sRNA, and mRNA expression. This second edition is thoroughly updated to reflect new evidence and developing theories in the field of evolutionary epigenetics. New and revised chapters speak to the epigenetic basis of heredity, epigenetic regulation of animal structure and homeostasis, neural manipulation of gene expression, central control of gametogenesis, epigenetic control of early development, the origin of epigenetic information, evolutionary changes in response to environmental stressors, epigenetics of sympatric evolution, and the epigenetics of the Cambrian explosion, among other topics. Adopts an integrative approach to examine the causal basis of evolution from an epigenetic point-of-view Features new and revised chapters which reflect novel experimental and observational evidence in the field of evolutionary epigenetics, as well as alternative theoretical approaches Offers a broad view of epigenetic mechanisms of evolution, moving beyond conventional changes in epigenetic mechanisms, such as DNA methylation, histone modifications, and patterns of miRNA, sRNA and mRNA expression
Avian Anatomy: Integument
Author: Alfred Martin LucasPublisher:
ISBN:
Category : Birds
Languages : en
Pages : 428
Book Description
Molecular Basis of Epithelial Appendage Morphogenesis
Author: Cheng-Ming ChuongPublisher: Landes Bioscience
ISBN:
Category : Medical
Languages : en
Pages : 468
Book Description
Reviews recent experimental findings and current thinking on epithelial appendage morphogenesis. Contains sections on overview, morphogenesis of epithelial appendages on the body surface and within the body, molecular mechanisms, models, and approaches. Specific subjects include early molecular events in feather morphogenesis, evolutionarily conserved gene interactions, and molecular biology of anhidrotic ectodermal dysplasia. Many chapters contain summary diagrams of the formative process of organs, with cellular and molecular explanations. Annotation copyrighted by Book News, Inc., Portland, OR