Characterization Of Genetic Loci For Carbon Metabolism And Competition For Nodule Occupancy In Sinorhizobium Meliloti

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Characterization of Genetic Loci for Carbon Metabolism and Competition for Nodule Occupancy in Sinorhizobium Meliloti

Author : Barney Geddes
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)

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Book Synopsis Characterization of Genetic Loci for Carbon Metabolism and Competition for Nodule Occupancy in Sinorhizobium Meliloti by : Barney Geddes

Download or read book Characterization of Genetic Loci for Carbon Metabolism and Competition for Nodule Occupancy in Sinorhizobium Meliloti written by Barney Geddes and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In agriculture nitrogen fixation by rhizobial inocula is an environmentally and economically beneficial alternative to synthetic fertilization. The effectiveness of rhizobial inocula can be limited by the inability of inoculum strains to compete with indigenous strains for nodule occupancy. Sinorhizobium meliloti fixes nitrogen in a complex symbiotic relationship with legume hosts including the agriculturally important forage Medicago sativa and the model legume Medicago truncatula. The ability to utilize organic compounds has emerged as an important trait for competitiveness for nodule occupancy in S. meliloti and other rhizobia. This thesis describes the use of bacterial genetics to characterize two carbon metabolism loci in S. meliloti. A genetic locus for erythritol catabolism was characterized and shown to encode an ABC transporter that is required for the catabolism of erythritol, adonitol and L-arabitol, as well as the genes for the catabolism of these three polyols. The ability to utilize erythritol was not necessary for the ability to compete for nodule occupancy in S. meliloti, in contrast to Rhizobium leguminosarum. A genetic locus that encodes components of the De Ley-Doudoroff pathway of galactose catabolism was identified and also characterized. The inability to catabolize galactose resulted in an increased ability to compete for nodule occupancy in S. meliloti. Evidence is presented that is consistent with the hypothesis that increased competitiveness resulted from enhanced production of the symbiotic exopolysaccharide succinoglycan. Inferences are drawn that contribute to the broader understanding of rhizobium-legume symbiosis.

Carbon, Nitrogen and Oxygen Limitation-induced Loci of Rhizobium Meliloti Isolated by TN-5-luxab Mutagenesis and Their Role in Competition and Survival

Download Carbon, Nitrogen and Oxygen Limitation-induced Loci of Rhizobium Meliloti Isolated by TN-5-luxab Mutagenesis and Their Role in Competition and Survival PDF Online Free

Author : Daniel Martin Ragatz
Publisher :
ISBN 13 :
Total Pages : 328 pages
Book Rating : 4.3/5 (129 download)

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Book Synopsis Carbon, Nitrogen and Oxygen Limitation-induced Loci of Rhizobium Meliloti Isolated by TN-5-luxab Mutagenesis and Their Role in Competition and Survival by : Daniel Martin Ragatz

Download or read book Carbon, Nitrogen and Oxygen Limitation-induced Loci of Rhizobium Meliloti Isolated by TN-5-luxab Mutagenesis and Their Role in Competition and Survival written by Daniel Martin Ragatz and published by . This book was released on 1997 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Can J Microbiol

Author :
Publisher :
ISBN 13 :
Total Pages : 364 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Can J Microbiol by :

Download or read book Can J Microbiol written by and published by . This book was released on 2014 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Symbiotic Nitrogen Fixation

Author : P. Graham
Publisher : Springer Science & Business Media
ISBN 13 : 9401110883
Total Pages : 206 pages
Book Rating : 4.4/5 (11 download)

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Book Synopsis Symbiotic Nitrogen Fixation by : P. Graham

Download or read book Symbiotic Nitrogen Fixation written by P. Graham and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past three decades there has been a large amount of research on biological nitrogen fixation, in part stimulated by increasing world prices of nitrogen-containing fertilizers and environmental concerns. In the last several years, research on plant--microbe interactions, and symbiotic and asymbiotic nitrogen fixation has become truly interdisciplinary in nature, stimulated to some degree by the use of modern genetic techniques. These methodologies have allowed us to make detailed analyses of plant and bacterial genes involved in symbiotic processes and to follow the growth and persistence of the root-nodule bacteria and free-living nitrogen-fixing bacteria in soils. Through the efforts of a large number of researchers we now have a better understanding of the ecology of rhizobia, environmental parameters affecting the infection and nodulation process, the nature of specificity, the biochemistry of host plants and microsymbionts, and chemical signalling between symbiotic partners. This volume gives a summary of current research efforts and knowledge in the field of biological nitrogen fixation. Since the research field is diverse in nature, this book presents a collection of papers in the major research area of physiology and metabolism, genetics, evolution, taxonomy, ecology, and international programs.

Plant-microbe Interactions 2

Author : Gary Stacey
Publisher : Springer Science & Business Media
ISBN 13 : 1461560535
Total Pages : 238 pages
Book Rating : 4.4/5 (615 download)

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Book Synopsis Plant-microbe Interactions 2 by : Gary Stacey

Download or read book Plant-microbe Interactions 2 written by Gary Stacey and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant-Microbe Interactions, Volume 2 Volume 1 of this series has made its appearance and dealt forcefully with impor tant current topics in the field of plant-microbe interactions. We believe that the quality of those chapters was high and should serve as a focal point for the state of the art as well as an enduring reference. Volume 2 builds upon these accom plishments. Chapter 1 discusses the fascinating lipo-chitin signal molecules from Rhizo bium, aspects regarding their biosynthesis, and the basis for host specificity. These molecules are a cardinal example of how microorganisms influence plant development and stimulate speculation that they have identified a previously un known aspect of plant hormone activity. Chapter 2 continues the discussion of Rhizobium by considering the trafficking of carbon and nitrogen in nodules. Al though the ostensible advantage of nodules to plants is the fixation of atmos pheric nitrogen, the actual process involved in supplying reduced nitrogen to the plant host is complex.

Advances in Biology and Ecology of Nitrogen Fixation

Author : Takuji Ohyama
Publisher : BoD – Books on Demand
ISBN 13 : 9535112163
Total Pages : 286 pages
Book Rating : 4.5/5 (351 download)

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Book Synopsis Advances in Biology and Ecology of Nitrogen Fixation by : Takuji Ohyama

Download or read book Advances in Biology and Ecology of Nitrogen Fixation written by Takuji Ohyama and published by BoD – Books on Demand. This book was released on 2014-01-29 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological nitrogen fixation has essential role in N cycle in global ecosystem. Several types of nitrogen fixing bacteria are recognized: the free-living bacteria in soil or water; symbiotic bacteria making root nodules in legumes or non-legumes; associative nitrogen fixing bacteria that resides outside the plant roots and provides fixed nitrogen to the plants; endophytic nitrogen fixing bacteria living in the roots, stems and leaves of plants. In this book there are 11 chapters related to biological nitrogen fixation, regulation of legume-rhizobium symbiosis, and agriculture and ecology of biological nitrogen fixation, including new models for autoregulation of nodulation in legumes, endophytic nitrogen fixation in sugarcane or forest trees, etc. Hopefully, this book will contribute to biological, ecological, and agricultural sciences.

Prokaryotic Symbionts in Plants

Author : Katharina Pawlowski
Publisher : Springer Science & Business Media
ISBN 13 : 3540754601
Total Pages : 305 pages
Book Rating : 4.5/5 (47 download)

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Book Synopsis Prokaryotic Symbionts in Plants by : Katharina Pawlowski

Download or read book Prokaryotic Symbionts in Plants written by Katharina Pawlowski and published by Springer Science & Business Media. This book was released on 2009-06-17 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Endophytic prokaryotes can invade the tissue of the host plant without triggering defense reactions or disease symptoms. Instead, they promote the growth of the host plant due to their ability to fix atmospheric dinitrogen and/or to produce plant growth-promoting substances. This Microbiology Monographs volume presents up-to-date findings on the interactions between plants and beneficial prokaryotes, including the use of genomics for the analysis of plant-prokaryote symbioses and their evolution. Rhizobia-legume, actinorhizal and cyanobacterial symbioses are presented.

Microbial Versatility in Varied Environments

Author : Raghvendra Pratap Singh
Publisher : Springer Nature
ISBN 13 : 9811530289
Total Pages : 227 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis Microbial Versatility in Varied Environments by : Raghvendra Pratap Singh

Download or read book Microbial Versatility in Varied Environments written by Raghvendra Pratap Singh and published by Springer Nature. This book was released on 2020-04-09 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book compiles the latest studies on microorganisms thriving in extreme conditions. Microbes have been found in extremely high and low temperatures, highly acidic to saline conditions, from deserts to the Dead sea, from hot-springs to underwater hydrothermal vents- the diversity is incredible. The various chapters highlight the microbial life and describe the mechanisms of tolerance to these harsh conditions, and show how an understanding of these phenomena can help us exploit the microbes in biotechnology. The theme of the book is highly significant since life in these environments can give vital clues about the origin and evolution of life on earth, as a lot of these conditions simulate the environment present billions of years ago. Additionally, the study of adaptation and survival of organisms in such environments can be important for finding life on other planets. This book shall be useful for students, researchers and course instructors interested in evolution, microbial adaptations and ecology in varied environments.

Microbial Strategies for Crop Improvement

Author : Mohammad Saghir Khan
Publisher : Springer Science & Business Media
ISBN 13 : 364201979X
Total Pages : 371 pages
Book Rating : 4.6/5 (42 download)

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Book Synopsis Microbial Strategies for Crop Improvement by : Mohammad Saghir Khan

Download or read book Microbial Strategies for Crop Improvement written by Mohammad Saghir Khan and published by Springer Science & Business Media. This book was released on 2009-08-25 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: With an ever-increasing human population, the demand placed upon the agriculture sector to supply more food is one of the greatest challenges for the agrarian community. In order to meet this challenge, environmentally unfriendly agroch- icals have played a key role in the green revolution and are even today commonly recommended to circumvent nutrient de?ciencies of the soils. The use of ag- chemicals is, though, a major factor for improvement of plant production; it causes a profound deteriorating effect on soil health (soil fertility) and in turn negatively affects the productivity and sustainability of crops. Concern over disturbance to the microbial diversity and consequently soil fertility (as these microbes are involved in biogeochemical processes), as well as economic constraints, have prompted fun- mental and applied research to look for new agro-biotechnologies that can ensure competitive yields by providing suf?ciently not only essential nutrients to the plants but also help to protect the health of soils by mitigating the toxic effects of certain pollutants. In this regard, the role of naturally abundant yet functionally fully unexplored microorganisms such as biofertilizers assume a special signi?cance in the context of supplementing plant nutrients, cost and environmental impact under both conventional practices and derelict environments. Therefore, current devel- ments in sustainability involve a rational exploitation of soil microbial communities and the use of inexpensive, though less bio-available, sources of plant nutrients, which may be made available to plants by microbially-mediated processes.

Rhizobium Biology and Biotechnology

Author : Alexander P. Hansen
Publisher : Springer
ISBN 13 : 3319649825
Total Pages : 348 pages
Book Rating : 4.3/5 (196 download)

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Book Synopsis Rhizobium Biology and Biotechnology by : Alexander P. Hansen

Download or read book Rhizobium Biology and Biotechnology written by Alexander P. Hansen and published by Springer. This book was released on 2017-09-25 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides in-depth reviews of the role of Rhizobium in agriculture and its biotechnological applications. Individual chapters explore topics such as: the occurrence and distribution of Rhizobium; phenotypic and molecular characteristics of Rhizobium; impact of Rhizobium on other microbial communities in the rhizosphere; N2-fixation ability of Rhizobium; Rhizobium and biotic stress; Rhizobium-mediated restoration of an ecosystem; in silico analysis of the rhizobia pool; further biotechnological perspectives of Rhizobium.

Microbial Inoculants in Sustainable Agricultural Productivity

Author : Dhananjaya Pratap Singh
Publisher : Springer
ISBN 13 : 813222647X
Total Pages : 354 pages
Book Rating : 4.1/5 (322 download)

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Book Synopsis Microbial Inoculants in Sustainable Agricultural Productivity by : Dhananjaya Pratap Singh

Download or read book Microbial Inoculants in Sustainable Agricultural Productivity written by Dhananjaya Pratap Singh and published by Springer. This book was released on 2016-02-22 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: How to achieve sustainable agricultural production without compromising environmental quality, agro-ecosystem function and biodiversity is a serious consideration in current agricultural practices. Farming systems’ growing dependency on chemical inputs (fertilizers, pesticides, nutrients etc.) poses serious threats with regard to crop productivity, soil fertility, the nutritional value of farm produce, management of pests and diseases, agro-ecosystem well-being, and health issues for humans and animals. At the same time, microbial inoculants in the form of biofertilizers, plant growth promoters, biopesticides, soil health managers, etc. have gained considerable attention among researchers, agriculturists, farmers and policy makers. The first volume of the book Microbial Inoculants in Sustainable Agricultural Productivity - Research Perspectives highlights the efforts of global experts with regard to various aspects of microbial inoculants. Emphasis is placed on recent advances in microbiological techniques for the isolation, characterization, identification and evaluation of functional properties using biochemical and molecular tools. The taxonomic characterization of agriculturally important microorganisms is documented, along with their applications in field conditions. The book exploresthe identification, characterization and diversity analysis of endophytic microorganisms in various crops including legumes/ non-legumes, as well as the assessment of their beneficial impacts in the context of promotingplant growth. Moreover, it provides essential updates onthe diversity and role of plant growth promoting rhizobacteria (PGPR) and arbuscular mycorrhizal mycorrhizal fungi (AMF). Further chaptersexamine in detailbiopesticides, thehigh-density cultivation of bioinoculants in submerged culture, seed biopriming strategies for abiotic and biotic stress tolerance, andPGPR as abio-control agent. Given its content,the book offers a valuable resource for researchers involved in research and development concerningPGPR, biopesticides and microbial inoculants.

The Mechanistic Benefits of Microbial Symbionts

Author : Christon J. Hurst
Publisher : Springer
ISBN 13 : 3319280686
Total Pages : 319 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis The Mechanistic Benefits of Microbial Symbionts by : Christon J. Hurst

Download or read book The Mechanistic Benefits of Microbial Symbionts written by Christon J. Hurst and published by Springer. This book was released on 2016-05-24 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume summarizes recent advances in our understanding of the mechanisms that produce successful symbiotic partnerships involving microorganisms. It begins with a basic introduction to the nature of and mechanistic benefits derived from symbiotic associations. Taking that background knowledge as the starting point, the next sections include chapters that examine representative examples of coevolutionary associations that have developed between species of microbes, as well as associations between microbes and plants. The authors conclude with a section covering a broad range of associations between microbes and invertebrate animals, in which they discuss the spectrum of hosts, with examples ranging from bryozoans and corals to nematodes, arthropods, and cephalopods. Join the authors on this journey of understanding!

Bibliography of Agriculture

Author :
Publisher :
ISBN 13 :
Total Pages : 2376 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Bibliography of Agriculture by :

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1996 with total page 2376 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Hydroponics

Author : Toshiki Asao
Publisher : BoD – Books on Demand
ISBN 13 : 9535103865
Total Pages : 258 pages
Book Rating : 4.5/5 (351 download)

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Book Synopsis Hydroponics by : Toshiki Asao

Download or read book Hydroponics written by Toshiki Asao and published by BoD – Books on Demand. This book was released on 2012-03-23 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydroponics-A standard methodology for plant biological researches provides useful information on the requirements and techniques needs to be considered in order to grow crops successfully in hydroponics. The main focuses of this book are preparation of hydroponic nutrient solution, use of this technique for studying biological aspects and environmental controls, and production of vegetables and ornamentals hydroponically. The first chapter of this book takes a general description of nutrient solution used for hydroponics followed by an outline of in vitro hydroponic culture system for vegetables. Detailed descriptions on use of hydroponics in the context of scientific research into plants responses and tolerance to abiotic stresses and on the problems associated with the reuse of culture solution and means to overcome it are included. Some chapters provides information on the role of hydroponic technique in studying plant-microbe-environment interaction and in various aspects of plant biological research, and also understanding of root uptake of nutrients and thereof role of hydroponics in environmental clean-up of toxic and polluting agents. The last two chapters outlined the hydroponic production of cactus and fruit tree seedlings. Leading research works from around the world are brought together in this book to produce a valuable source of reference for teachers, researcher, and advanced students of biological science and crop production.

Nitrogen Fixation in Agriculture, Forestry, Ecology, and the Environment

Author : Dietrich Werner
Publisher : Springer Science & Business Media
ISBN 13 : 9781402035425
Total Pages : 380 pages
Book Rating : 4.0/5 (354 download)

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Book Synopsis Nitrogen Fixation in Agriculture, Forestry, Ecology, and the Environment by : Dietrich Werner

Download or read book Nitrogen Fixation in Agriculture, Forestry, Ecology, and the Environment written by Dietrich Werner and published by Springer Science & Business Media. This book was released on 2005-10-24 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainability has a major part to play in the global challenge of continued development of regions, countries, and continents all around the World and biological nitrogen fixation has a key role in this process. This volume begins with chapters specifically addressing crops of major global importance, such as soybeans, rice, and sugar cane. It continues with a second important focus, agroforestry, and describes the use and promise of both legume trees with their rhizobial symbionts and other nitrogen-fixing trees with their actinorhizal colonization. An over-arching theme of all chapters is the interaction of the plants and trees with microbes and this theme allows other aspects of soil microbiology, such as interactions with arbuscular mycorrhizal fungi and the impact of soil-stress factors on biological nitrogen fixation, to be addressed. Furthermore, a link to basic science occurs through the inclusion of chapters describing the biogeochemically important nitrogen cycle and its key relationships among nitrogen fixation, nitrification, and denitrification. The volume then provides an up-to-date view of the production of microbial inocula, especially those for legume crops.

Molecular Microbial Ecology of the Rhizosphere, 2 Volume Set

Author : Frans J. de Bruijn
Publisher : Wiley-Blackwell
ISBN 13 : 9781118296172
Total Pages : 1328 pages
Book Rating : 4.2/5 (961 download)

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Book Synopsis Molecular Microbial Ecology of the Rhizosphere, 2 Volume Set by : Frans J. de Bruijn

Download or read book Molecular Microbial Ecology of the Rhizosphere, 2 Volume Set written by Frans J. de Bruijn and published by Wiley-Blackwell. This book was released on 2013-06-04 with total page 1328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular Microbial Ecology of the Rhizosphere covers current knowledge on the molecular basis of plant-microbe interactions in the rhizosphere. Also included in the book are both reviews and research-based chapters describing experimental materials and methods. Edited by a leader in the field, with contributions from authors around the world, Molecular Microbial Ecology of the Rhizosphere brings together the most up-to-date research in this expanding area, and will be a valuable resource for molecular microbiologists and plant soil scientists, as well as upper level students in microbiology, ecology, and agriculture.

Phyto-Microbiome in Stress Regulation

Author : Manoj Kumar
Publisher : Springer Nature
ISBN 13 : 9811525765
Total Pages : 346 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis Phyto-Microbiome in Stress Regulation by : Manoj Kumar

Download or read book Phyto-Microbiome in Stress Regulation written by Manoj Kumar and published by Springer Nature. This book was released on 2020-03-16 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses “phyto-microbiome mediated stress regulation”. Fundamentally speaking, the microbial community’s importance for the survival of plants under stress conditions has already been confirmed. This book focuses on the roles of those rhizospheric microbiomes that are advantageous to plant developmental pathways. Gathering contributions by authors with specialized expertise in plant growth and health under stress conditions, as well as opportunistic pathogenic bacteria, the book reviews the functional aspects of rhizospheric microorganisms and how they impact plant health and disease. It offers a compendium of plant and microbial interactions at the level of multitrophic interactions, and identifies gaps between future demand and present research on plant stress. In closing, the authors highlight several directions for reshaping rhizosphere microbiomes in favor of microorganisms that are beneficial to plant growth and health.