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Author : David Solomon Ucker
Publisher :
Page : 146 pages
File Size : 50,68 MB
Release : 1977
Category : Nitrogen
ISBN :
Author : Gary S. Stacey
Publisher : Springer Science & Business Media
Page : 960 pages
File Size : 23,76 MB
Release : 1992-04-30
Category : Nature
ISBN : 9780412024214
Phylogenetic classification of nitrogen-fixing organisms. Physiology of nitrogen fixation in free-living heterotrophs. Nitrogen fixation by photosynthetic bacteria. Nitrogen fixation in cyanobacteria. Nitrogen fixation by methanogenic bacteria. Associative nitrogen-fixing bacteria. Actinorhizal symbioses. Ecology of bradyrhizobium and rhizobium. The rhizobium infection process. Physiology of nitrogen-fixing legume nodules: compartments, and functions. Hydrogen cycling in symbiotic bacteria. Evolution of nitrogen-fixing symbioses. The rhizobium symbiosis of the nonlegume parasponia. Genetic analysis of rhizobium nodulation. Nodulins in root nodule development. Plant genetics of symbiotic nitrogen fixation. Molecular genetics of bradyrhizobium symbioses. The enzymology of molybdenum-dependent nitrogen fixation. Alternative nitrogen fixation systems. Biochemical genetics of nitrogenase. Regulation of nitrogen fixation genes in free-living and symbiotic bacteria. Isolated iron-molybdenum cofactor of nitrogenase.
Author : F. O'Gara
Publisher : Springer Science & Business Media
Page : 214 pages
File Size : 23,84 MB
Release : 2012-12-06
Category : Science
ISBN : 9400914016
Rhizobium species involved in root nodule formation on legume plants are one of the best known groups of micro organisms. The Rhizobium legume symbiosis continues to be of strategic importance particularly in the context of food production. As the world population grows, it is also neces sary to have new developments taking place in crop improve ment. The development and application of new technologies in biological sciences over the past number of years have made the entire area of plant-microbial interaction an exciting and challenging research area to be involved in. In view of the importance of symbiotic nitrogen fixation, it is not surpris ing that it still represents one of the priority areas for commercial development in agricultural biotechnology. Since this symbiosis involves an association between procaryotic and eucaryotic partners, it requires of necessity a co-ordinated and interdisciplinary approach. It was in this spirit that this international conference was organised. The scientific programme was designed to focus on physio logical limitations affecting symbiotic nitrogen fixation and the potential for overcoming such limitations using genetic technologies. Participants were drawn from contractants of the EEC DGVI "Energy in Agriculture" nitrogen fixation prog ramme. The scientific programme was also supplemented with invited scientists from Europe and North America to provide appropriate expertise on the various conference topics.
Author : P. Graham
Publisher : Springer Science & Business Media
Page : 206 pages
File Size : 12,74 MB
Release : 2012-12-06
Category : Science
ISBN : 9401110883
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.
Author : G.H. Elkan
Publisher : Springer Science & Business Media
Page : 196 pages
File Size : 43,6 MB
Release : 2012-12-06
Category : Science
ISBN : 9401157006
In the 100 years since the legume-Rhizobium symbiotic nitrogen fixation interaction was first described, interest in this field has grown rapidly. The types of studies have been cyclical in nature, involving a cross-section of disciplines. The availability of cheap nitrogenous fertilizers caused much of the biological nitrogen fixation research to become more theoretical in the developed world. The high cost of energy, coupled with environmental concerns and the interest in sustainable agriculture, has stimulated research in symbiotic nitrogen fixation. The development of modern genetic techniques has resulted in interdisciplinary research on plant-microbe interactions controlling nitrogen fixation. This has resulted in a better understanding of environmental factors influencing the nodulation process, chemical signalling between the symbiotic partners and the nature of the specificity between host plant and microsymbiotant. This volume summarizes the diverse research efforts in biological nitrogen fixation by presenting a collection of papers in the areas of physiology and metabolism, taxonomy and evolution, genetics and ecology.
Author : Shin-Ichi Aizawa
Publisher : Elsevier
Page : 142 pages
File Size : 19,35 MB
Release : 2013-12-16
Category : Science
ISBN : 0124172830
The Flagellar World is a unique publication. The product of years of research and data collection by the author, this book is a pictorial guide to flagella in a variety of organisms. Each EM image is accompanied by a short description of the system in each organism. These never-before-seen pictures represent a wide variety of flagella, including Legionella pneumophila, Escherichia coli, Pseudomonas aeruginosa, and many others. Researchers in microbiology, immunology, and parasitology will find this a fascinating and useful resource. A unique publication with many never before seen EM images of flagella A historical document of years of research on flagella Fills a specific niche that shows flagella in several varied organisms
Author : Esperanza Martínez
Publisher : Springer Science & Business Media
Page : 286 pages
File Size : 25,47 MB
Release : 2012-12-06
Category : Science
ISBN : 1461547954
For 31 years, the North American Symbiotic Nitrogen Fixation Conference (for merly Rhizobium Conference) has been a forum for scientists and graduate students to discuss their research advances, extending from basic aspects to agricultural appli cations, and dealing with topics ranging from bacterial genetics and metabolism to plant genetics and physiology. Nitrogen fixation, being a major life-supporting process on this planet, has attracted the interest of researchers for more than one century. Nitrogen fixation is responsible for the conversion of "inert" dinitrogen (N ) gas from the atmos z phere into usable ammonia, replacing the fixed nitrogen constantly being lost to the atmosphere by the denitrification process. Worldwide agricultural productivity is deter mined by the availability of fixed nitrogen in all its forms, which the continually increas ing human population depends upon for survival. An international momentum is developing in the use of biofertilizers to improve legume and non-legume crop yields and in the study of genomics in this area. New studies are being undertaken in several laboratories to study novel nitrogen-fixing systems, including non-legume crops. The North American Conferences on Symbiotic Nitrogen Fixation have periodically chronicled the advances in our knowledge of this area. For the first time, this conference was held in Mexico. Thus, all three North Amer ican countries have been hosts for this event. This year conference brought nearly 200 scientists from 18 different countries presenting lectures and over 80 posters.
Author : Martin Alexander
Publisher : Springer Science & Business Media
Page : 253 pages
File Size : 47,75 MB
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 1461327474
Author : Yi-Ping Wang
Publisher : Springer Science & Business Media
Page : 478 pages
File Size : 35,62 MB
Release : 2005-08-26
Category : Science
ISBN : 9781402035692
This volume covers all aspects of fundamental and applied nitrogen-fixation research, extending from biochemistry and chemistry through genetics, regulation and physiology to agricultural practice and environmental impact. It describes recent progress on studies of potential catalysts for nitrogen fixation; how the N2-fixing process is regulated in living cells; the use and impact of genetics and genomics on our understanding of the biological process; the wide variety of associations of nitrogen-fixing microbes with plants, including the formalized Rhizobium-legume and actinorrhizal associations as well as the less formalized associative and endophytic interactions; and the impact of nitrogen fixation in agriculture and forestry, including its effect on the environment. This volume provides an up-to-date referenced source, which can be readily accessed by all practicing and otherwise interested proponents of nitrogen fixation research, including those with related interests in the areas of plant and microbial science, genomics, plant-microbe interactions, genetics and regulation, plant growth and biocontrol, agriculture, forestry, ecology, taxonomy and evolution.
Author :
Publisher :
Page : 215 pages
File Size : 19,75 MB
Release : 1988
Category :
ISBN :
The influence of host plant energy supply on nitrogen fixation; Carbon metabolism and the exclange of metabolites between symbionts in legume nodules; Bacterial catabolism of nitrogen contaning compounds in symbiotic nitrogen fixation; Studies on the Rhizobium-pea symbiosis: the role of malate dehydrogenase and the effect of the plant on the efficiency of the nitrogenase reaction; Energetics of symbiotic nitrogen fixation: the relationships between oxygen, malate and hydrogen; Rhizobium strain effect on nitrogen accumulation unpea relates to PEA carboxylase activity in nodules and asparagine in root bleeding sap. Flavanoid-rhizobium interactions; Peribacteroid membrane stability and phytoalexin production in legume nodules; Limitations and benefits of oxygen diffusion control in legume nodules; Factors controlling legume nitrogen fixation and their measurement in the field; Inhibition of symbiotic nitrogen fixation by nitrate; Variations in nodulation ability by strains of R. trifolii in the presence of nitrate; Positive and negative aspects of denitrification in Rhizobium-legume associations; Competition between nodulating and non-nodulating Rhizobium strains: delay of nodulation; Effect of soil pH on nitrogenase activity, crop yield and Rhizobium multiplication; Dicarboxylic acid utilization and nitrogen fixation efficiency in Rhizobium-legume symbiosis; Regulation of nitrogen fixation in the Rhizobium meliloti-alfafa symbiosis; Structure and regulation of fix genes from Rhizobium meliloti; Organization and expression of hydrogen-uptake (hu) genes of Rhizobium leguminosarum; Two classes of Rhizobium genes requiredfor the nodulation of legumes; The role of nodulins in root nodule development.