Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 361 for “"cyanobacteria"”.
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Redox Homeostasis in Cyanobacteria
… that GshA activity is essential for growth in cyanobacteria because we were unable to isolate a fully segregated ∆gshA deletion mutant. We did isolate a ∆gshB mutant strain that accumulates the biosynthetic intermediate γ-glutamylcysteine: γ-EC) instead of GSH. In this work, I have …
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Membrane Systems in Cyanobacteria
… necessitates accurate information of structure. Cyanobacteria are photosynthetic prokaryotes with three highly differentiated membrane systems: plasma membrane, outer membrane, and an internal system of thylakoid membranes. The presence of different membrane systems lends these cells a unique …
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Electrogenetic pathways in cyanobacteria
… is astounding and still not fully understood. Cyanobacteria, uniquely in the prokaryotic kingdom, can harvest solar energy to couple water oxidation with the reduction of carbon dioxide. This results in photosynthetic production of sugars, which provide energy to many ecosystems on Earth, and …
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Photosynthetic electron transport in cyanobacteria
… plants and algae as well as prokaryotic cyanobacteria and prochlorophytes have a similar photosynthetic apparatus. The light-driven reactions take place in the thylakoid membranes and three major membrane-intrinsic protein complexes carry out photosynthetic electron transfer, photosystem …
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Genomics, Metagenomics and Phylogenomics of Cyanobacteria
… the genomics, metagenomics and phylogenomics of Cyanobacteria. It is composed of five main parts, of which four are result manuscripts. In the first part (i.e., Introduction), I review a decade of cyanobacterial phylogeny and molecular dating. I show that, in spite of a considerable literature, …
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Regulation of Metabolism in Mycobacteria and Cyanobacteria
… II Toxin Antitoxin (TA) systems found in the cyanobacteria Microcystis aeruginosa and Synechocystis sp. PCC6803 (Synechocystis). Investigation of the biochemistry of M. aeruginosa VapBC systems was limited by poor expression, however a single TA system, VapBCMAE43230/20, was successfully …
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Enhancing the Industrial Potential of Filamentous Cyanobacteria
… industrial potential of filamentous N2-fixing cyanobacteria by increasing its biofuel tolerance, and to evaluate the economic feasibility and environmental impacts of a theoretical, cyanobacteria-based biofuel production facility. To develop a method to quantify filamentous cyanobacteria in …
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Interspecies interplay between cyanobacteria and green algae - the first step to know why cyanobacteria produce what we call “Toxins”
Over the past decades, cyanobacteria have attracted the researcher’s attention due to their ability to produce cyanotoxins. Among cyanotoxins, microcystins (MCs) are the most commonly studied. However, their significance for the producing species beyond their toxicity is still mysterious (was …
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Urea as an Effective Nitrogen Source for Cyanobacteria
… sources has coincided with the reappearance of cyanobacteria blooms in freshwaters. Here, we examined urea as a nitrogen source for three bloom-forming cyanobacteria species. We found that (1) urea was consumed more rapidly relative to inorganic nitrogen substrates, suggesting that cyanobacteria …
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Recruitment from resting stages among bloom-forming cyanobacteria
Cyanobacteria are known to form heavy blooms in eutrophicated freshwaters and also form resting stages, associated with the sediments, during harsh growth conditions. These resting stages can serve as inoculum for pelagic populations and function as a potential source for bloom formations. However, …
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Algae and cyanobacteria platforms for engineering biofuel production
… the capacity of a model microalga and two cyanobacteria species to provide the feedstock for sustainable liquid biofuel production. In particular, genetic manipulations in conjunction with nutritional triggers were used to redirect carbon into lipid biosynthesis. Wild-type and starch …
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Algae and cyanobacteria platforms for engineering biofuel production
… the capacity of a model microalga and two cyanobacteria species to provide the feedstock for sustainable liquid biofuel production. In particular, genetic manipulations in conjunction with nutritional triggers were used to redirect carbon into lipid biosynthesis. Wild-type and starch …
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Investigating Cytochromes in Photosynthetic Electron Transport in Cyanobacteria
Inhibitor binding sites in the cytochrome bf complex of Synechococcus 7002 was modified by site-directed mutagenesis. The aim of this study was to identify the amino acid residues in cytochrome b6 that participate in plastoquinol and inhibitor binding at the plastoquinol oxidation site of the …
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Trace metals and the ecology of marine cyanobacteria
The marine cyanobacteria Synechococcus and Prochlorococcus are important primary producers in oligotrophic oceans. The abundance and cell division rates of these cyanobacteria can be influenced by trace metals such as iron and copper. Iron is an essential trace metal that is present in the high …
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Auxiliary metabolic genes in viruses infecting marine cyanobacteria
… microbial hosts. Cyanophages that infect the cyanobacteria Prochlorococcus and Synechococcus often carry metabolic genes not found in other bacteriophages. The proteins encoded by these `auxiliary metabolic genes' (AMGs) are thought to increase phage fitness by altering host metabolism during …
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Carbohydrate-Interacting Proteins from Two Nostoc (Cyanobacteria) Species
Cyanobacteria of the Nostoc genus are known for the thick, mucilaginous carbohydrate coatings that they produce. In this work, two examples of cyanobacterial glycobiology are considered, each of which involves a cyanobacterium of the Nostoc genus. The first portion of this work details attempts to …
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Evaluation Of Toxic Cyanobacteria In Central Florida Stormwater Ponds
… of Florida is no exception to this phenomenon. Cyanobacteria, or blue-green algae, have proven to be of special concern due to its proliferation and potential to produce toxins that are harmful to humans, livestock and wildlife. A casual drive along the roads and in the neighborhoods of central …
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Engineering heavy metal resistance in cyanobacteria Synechococcus elongatus PCC7942
Cyanobacteria are a large and diverse group of photosynthetic prokaryotes, which are adapted to various habitats and play an important role in any ecosystem. These organism encounter various environmental pressures, including heavy metal toxicity which can be significant. One of the possible …
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