Identification and Functional Analyses of Genes Regulating Seed Dormancy, Longevity and Germination PDF Download
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Author:
Publisher:
ISBN: 9789463432535
Category :
Languages : en
Pages : 150
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Book Description
Author:
Publisher:
ISBN: 9789463432535
Category :
Languages : en
Pages : 150
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Book Description
Author: Angel J. Matilla
Publisher: MDPI
ISBN: 3039436538
Category : Science
Languages : en
Pages : 124
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Book Description
The appearance of the new generation in higher plants is ensured by the presence of viable seeds in the mother plant. A good number of signaling networks is necessary to provoke germination. Phytohormones play a key role in all stages of seed development, maturation, and dormancy acquisition. The dormancy of some seeds can be relieved through a tightly regulated process called after-ripening (AR) that occurs in viable seeds stored in a dry environment. Although ABA is directly involved in dormancy, recent data suggest that auxin also plays a preponderant role. On the other hand, the participation of reactive oxygen species (ROS) in the life of the seed is becoming increasingly confirmed. ROS accumulate at different stages of the seed’s life and are correlated with a low degree of dormancy. Thus, ROS increase upon AR and dormancy release. In the last decade, the advances in the knowledge of seed life have been noteworthy. In this Special Issue, those processes regulated by DOG1, auxin, and nucleic acid modifications are updated. Likewise, new data on the effect of alternating temperatures (AT) on dormancy release are here present. On the one hand, the transcriptome patterns stimulated at AT that encompasses ethylene and ROS signaling and metabolism together with ABA degradation were also discussed. Finally, it was also suggested that changes in endogenous γ-aminobutyric acid (GABA) may prevent seed germination.
Author: Naoto Kawakami
Publisher: Springer Nature
ISBN: 107163965X
Category :
Languages : en
Pages : 194
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Book Description
Author: Michael Fenner
Publisher: Cambridge University Press
ISBN: 9780521653688
Category : Science
Languages : en
Pages : 276
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Book Description
What determines the number and size of the seeds produced by a plant? How often should it reproduce them? How often should a plant produce them? Why and how are seeds dispersed, and what are the implications for the diversity and composition of vegetation? These are just some of the questions tackled in this wide-ranging review of the role of seeds in the ecology of plants. The authors bring together information on the ecological aspects of seed biology, starting with a consideration of reproductive strategies in seed plants and progressing through the life cycle, covering seed maturation, dispersal, storage in the soil, dormancy, germination, seedling establishment, and regeneration in the field. The text encompasses a wide range of concepts of general relevance to plant ecology, reflecting the central role that the study of seed ecology has played in elucidating many fundamental aspects of plant community function.
Author: Kent Bradford
Publisher: John Wiley & Sons
ISBN: 1405173270
Category : Science
Languages : en
Pages : 392
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Book Description
The formation, dispersal and germination of seeds are crucial stages in the life cycles of gymnosperm and angiosperm plants. The unique properties of seeds, particularly their tolerance to desiccation, their mobility, and their ability to schedule their germination to coincide with times when environmental conditions are favorable to their survival as seedlings, have no doubt contributed significantly to the success of seed-bearing plants. Humans are also dependent upon seeds, which constitute the majority of the world’s staple foods (e.g., cereals and legumes). Seeds are an excellent system for studying fundamental developmental processes in plant biology, as they develop from a single fertilized zygote into an embryo and endosperm, in association with the surrounding maternal tissues. As genetic and molecular approaches have become increasingly powerful tools for biological research, seeds have become an attractive system in which to study a wide array of metabolic processes and regulatory systems. Seed Development, Dormancy and Germination provides a comprehensive overview of seed biology from the point of view of the developmental and regulatory processes that are involved in the transition from a developing seed through dormancy and into germination and seedling growth. It examines the complexity of the environmental, physiological, molecular and genetic interactions that occur through the life cycle of seeds, along with the concepts and approaches used to analyze seed dormancy and germination behavior. It also identifies the current challenges and remaining questions for future research. The book is directed at plant developmental biologists, geneticists, plant breeders, seed biologists and graduate students.
Author: Michael Fenner
Publisher: CABI
ISBN: 9780851994321
Category : Nature
Languages : en
Pages : 410
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Book Description
This is the second edition of a multi-author book first published in 1992. It deals with all aspects of plant regeneration by seeds, including reproductive allocation, seed dispersal and predation, longevity, dormancy and germination. All chapters have been updated, and four new chapters added on seed size, seedling establishment, the role of gaps, and regeneration from seed after fire.
Author: Roosa Laitinen
Publisher: John Wiley & Sons
ISBN: 1118860179
Category : Science
Languages : en
Pages : 256
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Book Description
Plants are forced to adapt for a variety of reasons— protection, reproductive viability, and environmental and climatic changes. Computational tools and molecular advances have provided researchers with significant new insights into the molecular basis of plant adaptation. Molecular Mechanisms in Plant Adaptation provides a comprehensive overview of a wide variety of these different mechanisms underlying adaptation to these challenges to plant survival. Molecular Mechanisms in Plant Adaptation opens with a chapter that explores the latest technological advances used in plant adaptation research, providing readers with an overview of high-throughput technologies and their applications. The chapters that follow cover the latest developments on using natural variation to dissect genetic, epigenetic and metabolic responses of plant adaptation. Subsequent chapters describe plant responses to biotic and abiotic stressors and adaptive reproductive strategies. Emerging topics such as secondary metabolism, small RNA mediated regulation as well as cell type specific responses to stresses are given special precedence. The book ends with chapters introducing computational approaches to study adaptation and focusing on how to apply laboratory findings to field studies and breeding programs. Molecular Mechanisms in Plant Adaptation interest plant molecular biologists and physiologists, plant stress biologists, plant geneticists and advanced plant biology students.
Author: Po-Pu Liu
Publisher:
ISBN: 9780549072768
Category : Arabidopsis thaliana
Languages : en
Pages : 148
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Book Description
In mature Arabidopsis seeds, the testa (seed coat) is no longer a living tissue. Thus, major sites of gene expression in imbibed seeds are the internal living tissues such as the embryo and the endosperm. To elucidate the molecular mechanisms of seed germination, the gene regulation in these two tissues during germination needs to be investigated. An enhancer-trap approach was used in this study to identify tissue- and stage-specific gene expression in seeds. The Arabidopsis enhancer-trap lines (Thomas Jack's population, CS31086) from the Arabidopsis Biological Resource Center (ABRC) were screened for beta-glucuronidase (GUS) expression in imbibed seeds in order to identify and characterize seed germination-associated genes. One hundred twenty one independent lines exhibiting diverse tissue-specific GUS expression patterns were isolated and kept as the Seed-GUS-Expression enhancer-trap library. This library was donated to the ABRC (stock no. CS24362--CS24480), and is now available to the international seed research community. Ninety one lines showed GUS expression predominantly in the micropylar end of the seed (named BME [Blue Micropylar End] lines), indicating that the micropylar region of Arabidopsis seed is selectively activated during germination. One of these lines, BME3, had a T-DNA insertion site in the 5' upstream region of a GATA-type zinc finger transcription factor gene (termed BME3-ZF). The BME3-ZF mRNA accumulated in seeds during cold stratification, suggesting its involvement in the physiological changes that accelerate the release of dormancy. BME3-ZF was expressed just prior to the expression of two GA biosynthesis genes, AtGA20ox3 and AtGA3ox1 which are also induced by cold stratification. The BME3-ZF knockout plants produced seeds exhibiting increased dormancy, which showed reduced response to cold stratification. The ungerminated knockout seeds exhibited testa rupture, but failed to penetrate the endosperm layer. Application of gibberellic acid (GA3) rescued impaired germination of the knockout seeds without cold stratification, indicating that the normal GA signal transduction pathway is present in the knockout seeds. These results indicate BME3 GATA zinc finger protein is a positive regulator of Arabidopsis seed germination. In this study, we provide the proof-of-concept study for the Seed-GUS-Expression enhancer trap library and the detailed procedures to use a combination of gene-expression analysis of wild-type seeds and functional analysis using knockout plants for encouraging international collaborations to utilize this library which is a useful tool to identify the genes critical for seed germination.
Author: J. Derek Bewley
Publisher: Springer Science & Business Media
ISBN: 1461446937
Category : Science
Languages : en
Pages : 400
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Book Description
This updated and much revised third edition of Seeds: Physiology of Development, Germination and Dormancy provides a thorough overview of seed biology and incorporates much of the progress that has been made during the past fifteen years. With an emphasis on placing information in the context of the seed, this new edition includes recent advances in the areas of molecular biology of development and germination, as well as fresh insights into dormancy, ecophysiology, desiccation tolerance, and longevity. Authored by preeminent authorities in the field, this book is an invaluable resource for researchers, teachers, and students interested in the diverse aspects of seed biology.
Author: S. Tsunoda
Publisher: Elsevier
ISBN: 0444598480
Category : Technology & Engineering
Languages : en
Pages : 391
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Book Description
This book presents a wealth of both general and specific information about rice. The first section outlines the distribution and mutual relationships of various types of rice with special attention to the adaptive strategy of wild and cultivated rice, and to the relationships between different ecotypes and their adaptation to low temperature, different photoperiods or different humidities. The section on rice morpho-physiology compares the characteristics of rice and dry land crops and different ecotypes with regard to seed dormancy and germination; describes the important steps in the photosynthetic structure process and its adjustment to the course of evolution of cultivated rice; studies the root and nutrient uptake and the responses to hormones in terrestrial and aquatic plants; considers the reproductive nature in relation to tolerance to environmental stress; and discusses the morphological characteristics of rice panicle in relation to grain filling, sink-source balance and variation in yield components of panicle structure. The last section reviews the genetics of rice and includes new findings on chromosomal analysis, cytoplasmic analysis and gene analysis and reviews recent achievements in tissue culture and genetic engineering techniques.The book is authoritative, well-documented and international in scope. It presents new and useful information of direct use to rice research workers and students, and of interest to crop physiologists, agronomists, plant physiologists and breeders throughout the world.
