Molecular Basis Of Apomixis In Plants
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Molecular Basis Of Apomixis In Plants
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Author : Diego Hojsgaard
language : en
Publisher: MDPI
Release Date : 2021-09-08
Molecular Basis Of Apomixis In Plants written by Diego Hojsgaard and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-08 with Science categories.
Apomixis is the consequence of a concerted mechanism that harnesses the sexual machinery and coordinates developmental steps in the ovule to produce an asexual (clonal) seed. Altered sexual developments involve widely characterized functional and anatomical changes in meiosis, gametogenesis, and embryo and endosperm formation. The ovules of apomictic plants skip meiosis and form unreduced female gametophytes whose egg cells develop into a parthenogenetic embryo, and the central cells may or may not fuse to a sperm to develop the seed endosperm. Thus, functional apomixis involves at least three components, apomeiosis, parthenogenesis, and endosperm development, modified from sexual reproduction that must be coordinated at the molecular level to progress through the developmental steps and form a clonal seed. Despite recent progress uncovering specific genes related to apomixis-like phenotypes and the formation of clonal seeds, the molecular basis and regulatory network of apomixis is still unknown. This is a central problem underlying the current limitations of apomixis breeding. This book collates twelve publications addressing different topics around the molecular basis of apomixis, illustrating recent discoveries and advances toward understanding the genetic regulation of the trait, discussing the possible origins of apomixis and the remaining challenges for its commercial deployment in plants.
Molecular Basis Of Apomixis In Plants
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Author : Diego Hojsgaard
language : en
Publisher:
Release Date : 2021
Molecular Basis Of Apomixis In Plants written by Diego Hojsgaard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
Apomixis is the consequence of a concerted mechanism that harnesses the sexual machinery and coordinates developmental steps in the ovule to produce an asexual (clonal) seed. Altered sexual developments involve widely characterized functional and anatomical changes in meiosis, gametogenesis, and embryo and endosperm formation. The ovules of apomictic plants skip meiosis and form unreduced female gametophytes whose egg cells develop into a parthenogenetic embryo, and the central cells may or may not fuse to a sperm to develop the seed endosperm. Thus, functional apomixis involves at least three components, apomeiosis, parthenogenesis, and endosperm development, modified from sexual reproduction that must be coordinated at the molecular level to progress through the developmental steps and form a clonal seed. Despite recent progress uncovering specific genes related to apomixis-like phenotypes and the formation of clonal seeds, the molecular basis and regulatorynetwork of apomixis is still unknown. This is a central problem underlying the current limitations of apomixis breeding. This book collates twelve publications addressing different topics around the molecular basis of apomixis, illustrating recent discoveries and advances toward understanding the genetic regulation of the trait, discussing the possible origins of apomixis and the remaining challenges for its commercial deployment in plants.
Apomixis In Angiosperms
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Author : Diego Hojsgaard
language : en
Publisher: CRC Press
Release Date : 2022-08-19
Apomixis In Angiosperms written by Diego Hojsgaard and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-08-19 with Science categories.
Apomixis is a difficult-to-analyse trait with a complex molecular basis and a substantive effect on the biology of a species. Thus, apomixis is an interesting characteristic for researchers and students working in different fields of plant science and agriculture, and technological advances are enabling and making apomixis studies more common. Apomixis in Angiosperms: Mechanisms, Occurrences, and Biotechnology provides a systematic introduction to the mechanisms and developmental types of apomixis along with an overview of alternative methodologies for identifying apomixis and a detailed reassessment of the occurrences of apomictic species among angiosperm families. Optional methods are illustrated with examples of all types of apomixis and biological levels of analysis, i.e. cells, ovules, seeds and offspring. Data on apomictic species are collected in tables along with information on ploidy, type of apomixis and references. Occurrences of apomixis are briefly discussed in phylogenetic and evolutionary contexts. An outline of the molecular basis of apomixis in plants is presented, together with prospects and challenges that remain for its biotechnological exploitation. This book: Provides a systematic overview of the mechanisms of apomixis, developmental types and methodology for apomixis research. Reassesses apomixis at the species level in angiosperm families. Contains tables summarizing relevant information on apomixis. Analyses occurrences of apomixis in phylogenetic and evolutionary contexts. Outlines the molecular basis and biotechnological perspective of apomixis breeding. This book presents an accessible overview of apomixis research and a curated dataset of apomictic species. It serves as a reference book for students, researchers and citizen scientists interested in apomixis, as well as researchers, business innovators and entrepreneurs pursuing apomixis breeding. It can also be used as a textbook in graduate courses on plant reproduction.
Plant Cytogenetics
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Author : Ram J. Singh
language : en
Publisher: CRC Press
Release Date : 2002-12-26
Plant Cytogenetics written by Ram J. Singh and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-12-26 with Science categories.
Plant cytogenetics has progressed at a rapid rate since the publication of the first edition. Plant Cytogenetics, Second Edition presents an up-to-date review of cytogenetics. It covers the latest in the various classical and modern techniques in the handling of chromosomes, karyotype analysis, genetics of meiosis, genomic relationships, and chromosome manipulation. It includes new chapters on extra chromosomal inheritance and the mode of reproduction in plants, paricularly apomixis, as well as new sections on the molecular basis of heredity, genomic in situ hybridization, and the classical and molecular methods of genome analysis. The author also elaborates on the cytogenetic basis of somaclonal variation generated through cell and tissue culture.
Apomixis In Plants
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Author : Sven Asker
language : en
Publisher: CRC Press
Release Date : 1992-03-10
Apomixis In Plants written by Sven Asker and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992-03-10 with Science categories.
Apomixis in Plants presents a comprehensive review of different aspects of asexual seed formation in plants. This is important in plant research since apomixis could greatly facilitate breeding in important crops. It is also interesting theoretically because it carries problems related to genetic variation and evolution to its extreme. The book features a broad selection of topics, including a historical review of ideas and landmarks in the field; comparisons with other types of asexual reproduction in higher plants and with related phenomena in animals and related plants; a presentation of cytology and embryology of apomicts and the diversified terminology in the field; views on the genetic background of apomixis and environmental effects on its expression; and the interrelation between apomixis and other traits. Additional topics covered include classical and modern theories of sexual versus asexual reproduction; geographical and taxonomical trends in apomicts; ecological implications of apomixis, and a review of future possibilities for using apomixis in plant breeding. Apomixis in Plants is an important reference volume for researchers and students in all areas of botany, ecology, and plant breeding.
Genetic Control Of Self Incompatibility And Reproductive Development In Flowering Plants
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Author : Elizabeth G. Williams
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09
Genetic Control Of Self Incompatibility And Reproductive Development In Flowering Plants written by Elizabeth G. Williams and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-09 with Science categories.
Plant reproductive biology has undergone a revolution during the past five years, with the cloning, sequencing and localization of the genes important in reproduction. These advantages in plant molecular biology have led to exciting applications in plant biotechnology, including the genetic engineering of male sterility and other reproductive processes. This book presents an interesting and contemporary account of these new developments from the scientists in whose laboratories they have been made. The chapters focus on two areas: the molecular biology of self-incompatibility, which is the system of self-recognition controlled by the S-gene and related genes; and the cellular and molecular biology of pollen development and genetic dissection of male sterility. Some chapters feature Arabidopsis, with its unique genetic system. Reproduction is vital for seed production in crop plants, and this book presents new approaches to manipulate plant breeding systems for the 21st century.
Understanding Plant Diversity And Evolution In The Mediterranean Basin
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Author : Nico Cellinese
language : en
Publisher: Frontiers Media SA
Release Date : 2023-04-28
Understanding Plant Diversity And Evolution In The Mediterranean Basin written by Nico Cellinese and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-04-28 with Science categories.
The Flowering Of Apomixis
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Author : Yves Savidan
language : en
Publisher: CIMMYT
Release Date : 2001
The Flowering Of Apomixis written by Yves Savidan and has been published by CIMMYT this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Science categories.
Embryology Of Flowering Plants Terminology And Concepts Vol 3
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Author : T B Batygina
language : en
Publisher: CRC Press
Release Date : 2019-04-23
Embryology Of Flowering Plants Terminology And Concepts Vol 3 written by T B Batygina and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-04-23 with Science categories.
Plant embryology, dealing with the regularities of initiation and the first stages of development of an organism, is now flourishing because of the overall progress being made in natural sciences. Such discoveries of the 20th century as production of plants from a single somatic cell, experimental haploidy, and parasexual hybridization were of general biological significance. The combined efforts of embryologists, geneticists and molecular biologists yielded the discovery of specific genes that control meiosis, egg cell development and early stages of embryogenesis. The tendency to synthesize data of embryology and genetics has become increasingly noticeable. It is connected with the fact that the majority of problems connected with morphogenesis, such as differentiation, specialization, the evaluation of features and the definition of the notionsgene and feature andgenotype and phenotype concern embryology and genetics (embryogenetics) in one way or another. Evolutionary embryology has given rise to a new approach to the study of problems of adaptation in plants. In connection with the problem of preserving biological diversity under conditions of ecological stress, special attention is paid to ecological embryology, revealing the critical periods in early ontogenesis and plasticity and tolerance of reproductive systems at the level of species and population. The study of variability of morphogenesis and phenotype in population (life cycle variations and the diversity of reproductive systems) is the most important point in the population embryology of plants.
Gene Flow From Gm Plants
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Author : Guy M. Poppy
language : en
Publisher: John Wiley & Sons
Release Date : 2008-04-15
Gene Flow From Gm Plants written by Guy M. Poppy 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 2008-04-15 with Science categories.
Gene flow is not unique to genetically modified (GM) crops, but the possibility of the spread of transgenic DNA to wild and domesticated relatives raises a new set of issues for scientists and policymakers to consider. Unfortunately, we are still too often unable to quantify the risks of ecological damage associated with gene flow. This is due partly to the huge breadth of knowledge required to assemble a comprehensive risk assessment. For example, many scientists active in research on the mechanics of gene flow nevertheless lack a deep understanding of what is required to identify, characterise and assess ecological risk, and many of those who are aware of the risk assessment process and the framework used for legislation have insufficient knowledge of the reproductive biology, agricultural systems, modelling and ecological literature required to compile a balanced risk assessment. This book, set in the context of gene flow in general, considers the assessment, measurement and management of the risks of gene flow from GM plants, combining the expertise of all the various stakeholders. It is directed at researchers and professionals in plant molecular genetics and plant ecology, in both the academic and industrial sectors.