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Author : Cheihsiang Jerry Chen
Publisher :
ISBN 13 :
Total Pages : 272 pages
Book Rating : 4.:/5 (21 download)
Download or read book Nitrogen metabolism and heterocyst differentiation in the cyanobacteria written by Cheihsiang Jerry Chen and published by . This book was released on 1987 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ashwani K. Rai
Publisher :
ISBN 13 :
Total Pages : 322 pages
Book Rating : 4.F/5 ( download)
Download or read book Cyanobacterial Nitrogen Metabolism and Environmental Biotechnology written by Ashwani K. Rai and published by . This book was released on 1997 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deals with cyanobacterial nitrogen metabolism exclusively, combining both environmental and biotechnological aspects of cyanobacteria. Leading researchers in the subject provide basic and applied information in cyanobacterial environmental biotechnology.
Author :
Publisher :
ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.:/5 (318 download)
Download or read book Cyanobacterial and Algal Metabolism and Environmental Biotechnology written by and published by . This book was released on 1999 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introduction to cyanobacterial and algal metabolisms and environmental biotechnology. It features the contributions of researchers and professionals for exploiting the biotechnological potentials of simple and unique oxygen evolving primitive organisms.
Author : T. A. Sarma
Publisher : CRC Press
ISBN 13 : 1578088003
Total Pages : 814 pages
Book Rating : 4.5/5 (78 download)
Download or read book Handbook of Cyanobacteria written by T. A. Sarma and published by CRC Press. This book was released on 2012-12-18 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook acquaints readers with the exciting developments in various areas of cyanobacterial research in the backdrop of the publication of complete genome sequence of the cyanobacterium Synechocystis sp. strain PCC 6803 in 1996. It begins with a summary of the current knowledge on the taxonomy, phylogeny and evolution of cyanobacteria followed by the sequenced genomes, differentiation of akinetes and heterocyst. The book considers mechanisms of cellular movements (gliding, swimming and twitching motions) exhibited by various cyanobacteria in order to adjust to their environmental niches and the operation of the circadian rhythms. It covers cyanobacterial symbiosis, cyanophages and cyanobacterial toxins, followed by a discussion on stress responses (salinity, temperature, desiccation and oxidation). A comprehensive account on the developments in all these spheres has been presented in a lucid style with the required background information, molecular techniques employed and models proposed. This handbook constitutes the first such book written by a single author at a level and depth for graduate and research students in botany and microbiology.
Author : Werner Klipp
Publisher : Springer Science & Business Media
ISBN 13 : 1402021798
Total Pages : 313 pages
Book Rating : 4.4/5 (2 download)
Download or read book Genetics and Regulation of Nitrogen Fixation in Free-Living Bacteria written by Werner Klipp and published by Springer Science & Business Media. This book was released on 2006-01-28 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetics and Regulation of Nitrogen-Fixing Bacteria This book is the second volume of a seven-volume series, which covers all fields of research related to nitrogen fixation - from basic studies through applied aspects to environmental impacts. Volume II provides a comprehensive and detailed source of information concerning the genetics and regulation of biological nitrogen fixation in free-living prokaryotes. This preface attempts to provide the reader with some insight into how this volume originated, how it was planned, and then how it developed over the several years of its production. Once the editorial team was established, the first job was to decide which of the many free-living diazotrophs that have been subjected to genetic analysis should be included in this volume. Would we need to develop specific criteria for selection or would the organisms, in effect, select themselves? Of course, Klebsiella pneumoniae and Azotobacter vinelandii, which have served (and still serve) as the main model organisms for the genetic analysis of diazotrophy, plus some of the other bacteria described in this volume, did indeed select themselves. However, there was considerable discussion surrounding well-characterized fixing species, like Azorhizobium caulinodans and Herbaspirillum seropedicae, both of which are able to fix atmospheric N under free-living conditions.
Author : N. G. Carr
Publisher : Univ of California Press
ISBN 13 : 9780520047174
Total Pages : 708 pages
Book Rating : 4.0/5 (471 download)
Download or read book The Biology of Cyanobacteria written by N. G. Carr and published by Univ of California Press. This book was released on 1982-01-01 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D.A. Bryant
Publisher : Springer
ISBN 13 : 9780792332220
Total Pages : 916 pages
Book Rating : 4.3/5 (322 download)
Download or read book The Molecular Biology of Cyanobacteria written by D.A. Bryant and published by Springer. This book was released on 1995-02-28 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Molecular Biology of Cyanobacteria summarizes more than a decade of progress in analyzing the taxonomy, biochemistry, physiology, cellular differentiation and developmental biology of cyanobacteria by modern molecular methods, especially molecular genetics. During this period cyanobacterial molecular biologists have been `studying those things that cyanobacteria do well', and they have made cyanobacteria the organisms of choice for detailed molecular analyses of oxygenic photosynthesis. Part 1 contains chapters describing the molecular evolution and taxonomy of the cyanobacteria, as well as chapters describing cyanelles and the origins of algal and higher plant chloroplasts. Also included are chapters describing the picoplanktonic, oceanic cyanobacteria and prochlorophytes, `the other cyanobacteria'. Part 2 is devoted to a detailed description of structural and functional aspects of the cyanobacterial photosynthetic apparatus. Included are chapters on thylakoid membrane organization, phycobiliproteins, and phycobilisomes, Photosystem I, Photosystem II, the cytochrome b6f complex, ATP synthase, and soluble electron carriers associated with photosynthetic electron transport. Structure, as it relates to biological function, is heavily emphasized in this portion of the book. Part 3 describes other important biochemical processes, including respiration, carbon metabolism, inorganic carbon uptake and concentration, nitrogen metabolism, tetrapyrrole biosynthesis, and carotenoid biosynthesis. Part 4 describes the cyanobacterial genetic systems and gene regulatory phenomena in these organisms. Emphasis is placed on responses to environmental stimuli, such as light intensity, light wavelength, temperature, and nutrient availability. Cellular differentiation and development phenomena, including the formation of heterocysts for nitrogen fixation and hormogonia for dispersal of organisms in the environment, are described. The book comprises 28 chapters written by leading experts from Europe, Israel, Japan, and the United States. The book is intended for graduate students and researchers in the fields of photosynthesis, microbiology, plant molecular biology, biochemistry, and biotechnology.
Author : Sabharatna Ananda Kulasooriya
Publisher :
ISBN 13 :
Total Pages : 412 pages
Book Rating : 4.:/5 (118 download)
Download or read book Studies on Heterocyst Differentiation and Nitrogen Fixation in Blue-green Algae written by Sabharatna Ananda Kulasooriya and published by . This book was released on 1971 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Yuping Cai
Publisher :
ISBN 13 :
Total Pages : 372 pages
Book Rating : 4.3/5 (129 download)
Download or read book Molecular Genetic Approaches Towards the Understanding of Heterocyst Differentiation and Pattern Formation in the Cyanobacterium Anabaena Sp written by Yuping Cai and published by . This book was released on 1991 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rajan Kumar et al eds
Publisher : Daya Books
ISBN 13 : 9788170354352
Total Pages : 376 pages
Book Rating : 4.3/5 (543 download)
Download or read book Glimpses Of Cyanobacteria written by Rajan Kumar et al eds and published by Daya Books. This book was released on 2006 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Present Book Is Compendium Of Recent Research On Cyanobacterial Studies. It Is An Assemblage Of The Up-To-Date Information Of Rapid Advances And Developments Taking Place In The Field Of Cyanobacteriology. The Book Is A Unique Compliation Of 20 Chapters Which Discusses Exhaustive Studies On Cyanobacterial Ecology, Cyanobacterial Biofertilizers, Toxicology, Taxonomy, Morphology, Physiology, Stress Responses, Biotechnology And Molecular Biology. This Book Will Be A Mile-Stone In The Field Of Cyanobacteriology Because It Will Open A New Vista In The Field Of Cyanobacteriology And Its Applied Aspects. Various Information Incorporated In The Book By Authors Who Are Internationally Acknowledged Experts In The Field Of Cyanobacteriology. The Book Has Been Framed With The Intention Of Providing A Sufficient Depth Of The Subject To Satisfy The Needs At A Level Which Will Be Comprehensive And Interesting. The Book Will Be Useful To The Students, Teachers, Scientists And Researchers From The Different Branches Of Phycology, Agricultural Biology And Paddy Growers. Contents Chapter 1: Cyanobacteria In The Soil Crusts And Their Significance By J Tirkey And S P Adhikary; Chapter 2: Regulation Of Heterocyst And Nitrogen Metabolism By A K Mishra, S K Singh, S S Singh & V D Pandey; Chapter 3: Role Of Cyanobacteria In Organic-Scented Rice Farming By Y V Singh And B V Singh; Chapter 4: Studies On Application Of Some Potential Cyanobacterial Strains In Scale-Up Production Of Ethnomedicinal Plants Of Southern Rajasthan By Usha Pandey; Chapter 5: Cyanobacteria As A Source Of Antimicrobial Compounds By V D Pandey, R K Gupta, R C Gupta, A K Mishra And S K Singh; Chapter 6: Distributional Patterns Of Cyanobacteria By M Kumar And G S Paliwal; Chapter 7: Biotechnological Potential Of A Cyanobacterium: Spirulina By Yashveer Singh, Chapter 8: Toxicity Of Different Insecticides To Rice Field Cyanobacteria By Mihir K Das And S P Adhikary; Chapter 9: Stress Response Of Mutant Strain Of Nostoc Calcicola To High Concentration Of Nahco3 By P Jaiswal, S Roy And A K Kashyap; Chapter 10: Spirulina: A Good Food And Feed Supplement By B V Singh And S Saxena; Chapter 11: Morphology And Physiology Of Antarctic Cyanobacterium Nostoc Commune By R K Gupta, V D Pandey And A K Kashyap; Chapter 12: Cyanobacteria In Relation To Human And Animal Health By A Khare And M Kumar; Chapter 13: Impact Of Uv-B (312Nm) Radiation On Nitrate, Ammonium And Phosphate Uptake In Spirulina Fusiformis By V Prasad, A Kumar And H D Kumar; Chapter 14: Various Roles Of Blue-Greens In Human Life By M Masroor A Khan; Chapter 15: Algal Species Diversity Of Streams Of Schirmacher Oasis, Antarctica By R K Gupta, V D Pandey, K D Pandey And D Vyas; Chapter 16: Azolla: A Potential Cyanobacterial Symbiont By S Saxena And B V Singh; Chapter 17: Population Dynamics Of The Cyanobacterialk Flora In The Foothills Of Garhwal Himalayas, Uttaranchal By M K Chaudhary And M Kumar; Chapter 18: Cyanobacteria: The Future Food For Man By Iqbal Habib And U K Chaturvedi; Chapter 19: Biotechnological Potentials Of Cyanobacteria By Shalini, B V Singh And R K Gupta; Chapter 20: Spirulina: A Blue Green Revolution By Surendra Singh, Archira Ganguly And Anuradha Tiwari.
Author : Ritu Garg
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)
Download or read book Cell Differentiation as Survival Strategy in the Filamentous Cyanobacterium Anabaena Variabilis ATCC 29413 written by Ritu Garg and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The planktonic freshwater filamentous cyanobacterium Anabaena variabilis ATCC 29413 (syn. Trichormus variabilis) grows as filaments of hundreds of cells and is capable of differentiating nitrogen fixing heterocysts, motile hormogonia and dormant akinetes from vegetative cells in response to different stress conditions. Under conditions of nitrogen limitation, heterocysts form in a semi-regular pattern and provide the filaments with organic nitrogen by fixing N2. Akinetes are transient spore-like cells enabling these bacteria to withstand harsh environmental conditions. When suitable growth conditions are available, the akinetes can germinate and produce new vegetative filaments, thereby providing cyanobacteria with a means of survival in changing habitats. Heterocysts and akinetes are characterized by the presence of a thick multilayered envelope, including an outermost polysaccharide and an inner glycolipid layer. Until now, the role of a glycolipid layer, which reduces the entry of oxygen into the heterocysts for the maintenance of a microoxic environment and nitrogen fixation, was unknown in spore-like akinetes. Therefore, in this work, the function of the gene Ava_2595 in A. variabilis, which is homolog to the known hglB gene, that encodes a putative polyketide synthase involved in heterocyst glycolipid synthesis in Anabaena sp. PCC 7120, a species which does not form akinetes, was elucidated. The hglB mutant was created and its phenotype was characterized and further investigated for the functionality of heterocysts and akinetes. This work revealed that the hglB mutant strain formed aberrant heterocysts and akinete-like cells, in which the specific glycolipid layers were absent demonstrating the requirement of HglB in glycolipid layer formation in both heterocyst and akinete envelope. Consequently, the mutant was unable to fix N2 under aerobic condition and to grow diazotrophically. This study also confirmed that both cell types use a glycolipid of identical chemical composition in their special envelopes. Furthermore, we unraveled the role of the glycolipids in protecting the akinetes against harsh conditions, like freezing, desiccation, oxidative stress and lytic enzymes. Severely reduced tolerance to stress conditions was exhibited by the akinetes lacking the glycolipids but under standard conditions, they could germinate normally. Our study established the dual role of the glycolipid layer in fulfilling different functions in the evolutionary-related specialized cells of cyanobacteria and indicated the existence of a common biosynthetic pathway for glycolipid synthesis in heterocysts and akinetes involving the same gene hglB. Akinetes accumulate large quantities of cytoplasmic reserve products, mainly glycogen and the nitrogen storage polymer cyanophycin during their differentiation. In this work, the physiological function of cyanophycin in akinete differentiation and germination was investigated which showed that the cyanophycin production is not required for these cellular processes. This study also summarized the significant morphological and physiological changes that occur during formation and germination of the akinetes in A. variabilis ATCC 29413. Further analysis of changes occurring during akinete formation and germination using scanning electron microscopy (SEM) found that the mature akinetes have a wrinkled envelope and during germination, the surface of the envelope smoothens upon increase in the cell size, and finally, the akinete envelope ruptures to release the short emerging filament. Also, in this work, the akinete envelope architecture of different layers, the exopolysaccharide and glycolipid layer, could be visualized and showed that this multilayered envelope helps to withstand the osmotic stress and to maintain the structural integrity. Finally, we demonstrated that the intercellular communication decreased during akinete formation as compared to the vegetative cells. In contrast, the cell communication was restored in freshly germinating filaments.
Author : Claudine Elmerich
Publisher : Nitrogen Fixation: Origins, Applications, and Research Progress
ISBN 13 :
Total Pages : 356 pages
Book Rating : 4.F/5 ( download)
Download or read book Associative and Endophytic Nitrogen-fixing Bacteria and Cyanobacterial Associations written by Claudine Elmerich and published by Nitrogen Fixation: Origins, Applications, and Research Progress. This book was released on 2007 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This self-contained volume covers fundamental and applied aspects of nitrogen-fixation research. The book describes milestones in the discovery of the associative and endophytic nitrogen-fixing bacteria found involved with cereal crops, forage grasses, and sugar cane. It provides a comprehensive overview of their phylogeny, physiology, and genetics as well as of the biology of their association with their host plants, including tools for in situ localization and population-dynamics analysis. Also included are chapters describing the functions required for a bacterium to be competent and competitive in the rhizosphere, and analysis of associations of cyanobacteria with fungi, diatoms, bryophytes, cycads, Azolla, and Gunnera.
Author : A.N. Rai
Publisher : Springer Science & Business Media
ISBN 13 : 0306480050
Total Pages : 357 pages
Book Rating : 4.3/5 (64 download)
Download or read book Cyanobacteria in Symbiosis written by A.N. Rai and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cyanobacterial symbioses are no longer regarded as mere oddities but as important components of the biosphere, occurring both in terrestrial and aquatic habitats worldwide. It is becoming apparent that they can enter into symbiosis with a wider variety of organisms than hitherto known, and there are many more still to be discovered, particularly in marine environments. The chapters cover cyanobacterial symbioses with plants (algae, bryophytes, Azolla, cycads, Gunnera), cyanobacterial symbioses in marine environments, lichens, Nostoc-Geosiphon (a fungus closely related to arbuscular mycorrhiza fungi) symbiosis, and artificial associations of cyanobacteria with economically important plants. In addition, cyanobiont diversity, sensing-signalling, and evolutionary aspects of the symbiosis are dealt with. Renowned experts actively involved in research on cyanobacterial symbioses deal with ecological, physiological, biochemical, molecular, and applied aspects of all known cyanobacterial symbioses. This volume on cyanobacteria in symbiosis complements the two earlier volumes on cyanobacteria published by Kluwer (Molecular Biology of Cyanobacteria, edited by D.A. Bryant and Ecology of Cyanobacteria, edited by B.A. Whitton and M. Potts). Together, the three volumes provide the most comprehensive treatment of cyanobacterial literature as a whole. The book will serve as a valuable reference work and text for teaching and research in the field of plant-microbe interactions and nitrogen fixation.
Author : Kathryn Marjorie Jones
Publisher :
ISBN 13 :
Total Pages : 342 pages
Book Rating : 4.:/5 (472 download)
Download or read book The Genetics of Heterocyst Metabolism in the Cyanobacterium Anabaena Sp. Strain PCC 7120 written by Kathryn Marjorie Jones and published by . This book was released on 2001 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gary Stacey
Publisher :
ISBN 13 :
Total Pages : 308 pages
Book Rating : 4.:/5 (537 download)
Download or read book Nitrogen and ammonia assimilation in the cyanobacteria written by Gary Stacey and published by . This book was released on 1978 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Prashant Kumar Singh
Publisher : Academic Press
ISBN 13 : 0128193115
Total Pages : 420 pages
Book Rating : 4.1/5 (281 download)
Download or read book Advances in Cyanobacterial Biology written by Prashant Kumar Singh and published by Academic Press. This book was released on 2020-03-04 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Cyanobacterial Biology presents the novel, practical, and theoretical aspects of cyanobacteria, providing a better understanding of basic and advanced biotechnological application in the field of sustainable agriculture. Chapters have been designed to deal with the different aspects of cyanobacteria including their role in the evolution of life, cyanobacterial diversity and classification, isolation, and characterization of cyanobacteria through biochemical and molecular approaches, phylogeny and biogeography of cyanobacteria, symbiosis, Cyanobacterial photosynthesis, morphological and physiological adaptation to abiotic stresses, stress-tolerant cyanobacterium, biological nitrogen fixation. Other topics include circadian rhythms, genetics and molecular biology of abiotic stress responses, application of cyanobacteria and cyanobacterial mats in wastewater treatments, use as a source of novel stress-responsive genes for development of stress tolerance and as a source of biofuels, industrial application, as biofertilizer, cyanobacterial blooms, use in Nano-technology and nanomedicines as well as potential applications. This book will be important for academics and researchers working in cyanobacteria, cyanobacterial environmental biology, cyanobacterial agriculture and cyanobacterial molecular biologists. Summarizes the various aspects of cyanobacterial research, from primary nitrogen fixation, to advanced nano-technology applications Addresses both practical and theoretical aspects of the cyanobacterial application Includes coverage of biochemical and molecular approaches for the identification, use and management of cyanobacteria
Author : Neissa M. Pinzon-Gamez
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (19 download)
Download or read book Heterocystous N2-fixing Cyanobacteria written by Neissa M. Pinzon-Gamez and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The concern about the exhaustion of fossil fuels and the harmful effects of their emissions to the environment is guiding efforts to find new energy alternatives. One of the most promising energy resources is hydrogen (H2). Cyanobacteria are among the most important candidates for photobiological H2 production. Some filamentous cyanobacteria have evolved to differentiate specialized cells called heterocysts where nitrogen fixation and H2 production take place. The complete understanding of the process of heterocyst differentiation is of great importance for photobiological H2 production. Prior to this study, there were no quantitative culture-level models that describe the effects of cellular activities and cultivation conditions on the heterocyst differentiation. Such a model was developed in this thesis, incorporating photosynthetic growth, heterocyst differentiation, self-shading effect on light penetration, and nitrogen fixation. This first-generation model was found to describe well the experimental results and it was able to predict different culture properties. Since the productivity and economics of all photosynthsis-related processes are influenced by the light utilization efficiency, the effect of red vs. white light, and their intensities, on cell growth and heterocyst differentiation was also investigated. Red light was found not only to stimulate the growth of the studied microorganisms but also to give higher heterocyst frequencies. Gas vesicles were another interesting structure of some cyanobacteria studied in this thesis. Gas vesicles provide cyanobacteria with a mechanism of buoyancy regulation. Purified gas vesicle suspensions had been shown to improve oxygenation in oxygen limited systems. In order to improve the cell-collection efficacy of cyanobacteria with gas vesicles, three different flocculants were tested and compaired, i.e. polyethyleneimine (PEI), chitosan and MPE-50 (a commerical product from Ondeo Nalco Center, exact formulation unknown). Even though, they showed similar flocculation efficacy at low cell concentrations, chitosan flocculation ability was greatly increased when the pH of the cell suspension was adjusted to lower values. Chitosan was proved to the useful for cyanobacterial cell collection using a concentration of 50 mg/L and adjusting pH of the cell sample to 5-7. The sensitivity of chitosan to changes in pH may be useful also in the later step of recovery and purification of gas vesicles after cell lysis."--Abstract
