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 61 for “"Prochlorococcus"”.
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Iron and Prochlorococcus
… the numerically abundant marine cyanobacterium, Prochlorococcus. With its minimal genome and ubiquity in the global ocean, Prochlorococcus represents a model system in which to study the dynamics of the link between iron and primary productivity. To this end, we tested the iron physiology of two …
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Iron and Prochlorococcus/
… the numerically abundant marine cyanobacterium, Prochlorococcus. With its minimal genome and ubiquity in the global ocean, Prochlorococcus represents a model system in which to study the dynamics of the link between iron and primary productivity. To this end, we tested the iron physiology of two …
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Prochlorococcus : life in light
Thesis: Ph. D. in Microbiology, Massachusetts Institute of Technology, Department of Biology, 2015.
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Quantification of Aggregate Formation in Prochlorococcus
Prochlorococcus, a unicellular cyanobacterium, is the smallest and the numerically dominant phytoplankton found in the oligotrophic ocean. Despite being one of the most important primary producers in the ocean, there are many questions regarding its lifestyle. Over recent years, aggregates have …
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Evolution and population genetics of Prochlorococcus marinus
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995, and Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1995.
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The Growth and Activity of Genetically Diverse Prochlorococcus
… model marine microbe, the cyanobacterium <italic>Prochlorococcus spp.</italic>, which numerically dominates tropical and subtropical open oceans and encompasses a group of genetically defined clades that are ecologically distinct. Ribosomal RNA is a promising indicator of in situ activity because …
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Prochlorococcus genetic transformation and genomics of nitrogen metabolism
Prochlorococcus, a unicellular cyanobacterium, is the most abundant phytoplankton in the oligotrophic, oceanic gyres where major plant nutrients such as nitrogen (N) and phosphorus (P) are at nanomolar concentrations. Nitrogen availability controls primary productivity in many of these regions. The …
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Host/virus interactions in the marine cyanobacterium prochlorococcus
… the oceans is performed by the picocyanobacteria Prochlorococcus and Synechococcus. The viruses ('cyanophages') that infect these cyanobacteria are unusual in that their genomes contain a large suite of orthologs to host metabolic genes. These orthologs, known as 'auxiliary metabolic genes' …
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Structure and dynamics of genome-wide diversity in Prochlorococcus
… through the lens of the marine cyanobacterium Prochlorococcus, which comprises a group of closely-related ecotypes that together perform most of the primary production in low-nutrient regions of the world oceans. Prochlorococcus was one of the first microbes in which a genomic basis for …
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Genetic diversity and its consequences for light adaptation in Prochlorococcus
… to survival in a particular environment. Prochlorococcus, a cyanobacterium that dominates the open ocean, offers an opportunity to explore such differences. Its diversity is examined here, beginning with an overview and comparison of 12 fully sequenced Prochlorococcus genomes. The …
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Physiological ecology of Prochlorococcus : a comparison of isolates from diverse oceanographic regimes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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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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Evolutionary Analysis of Large-Scale Genomic Changes
… prokaryotes and eukaryotes, including the genus Prochlorococcus, the methanogens, and five mammalian orders. A computational pipeline was developed to construct distance-based gene order trees. The resulting gene order phylogeny was consistent and congruent with the sequence-based trees. It also …
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Ecology, diversity and comparative genomics of oceanic cyanobacterial viruses
The marine cyanobacteria Prochlorococcus and Synechococcus are numerically dominant primary producers in the oceans. Each genera consists of multiple physiologically and genetically distinct groups (termed "ecotypes" in Prochlorococcus). Cyanobacterial viruses (cyanophages) that infect …
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Picophytoplankton photoacclimation and mixing in the surface oceans
… properties for the photosynthetic picoplankton, Prochlorococcus spp. Diel time-series observations from the Sargasso Sea reveal patterns in single-cell fluorescence distributions within Prochlorococcus spp. populations which appear to correspond to decreasing mixing rates and photoacclimation …
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Life in a drop of water
… those between an organism, the cyanobacterium Prochlorococcus, and its environment, the oligotrophic ocean. Prochlorococcus has been found living in very different oxygen regimes in the open ocean; I hypothesized that these different oxygen levels might primarily affect Prochlorococcus growth …
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Bacterioplankton dynamics in surface waters of the north-eastern (sub-)tropical Atlantic Ocean affected by Aeolian dust
… whereas key<br/>primary producers, Prochlorococcus cyanobacteria, numerically dominated during calmer<br/>conditions. Phytoplankton-associated Bacteroidetes and Synechococcus cyanobacteria were most<br/>abundant during turbulent conditions. Gammaproteobacteria, encompassing …
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The cobalt cycle in the Tropical Pacific Ocean
… in the South Pacific gyre, the cyanobacterium Prochlorococcus thrives. Minimum cobalt and iron requirements of a Prochlorococcus strain isolated from the Equatorial Pacific are quantified. Cobalt quotas are related to demand for ribonucleotide reductase and methionine synthase enzymes, which …
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The cobalt cycle in the tropical Pacific Ocean
… in the South Pacific gyre, the cyanobacterium Prochlorococcus thrives. Minimum cobalt and iron requirements of a Prochlorococcus strain isolated from the Equatorial Pacific are quantified. Cobalt quotas are related to demand for ribonucleotide reductase and methionine synthase enzymes, which …
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Phosphonate biogeochemical cycling in the marine environment: from an ocean scale to a molecular scale
… production in the model marine cyanobacterium Prochlorococcus SB. Using 31P NMR, we found Prochlorococcus SB allocates ~50% of its cellular P to phosphonates. Allocation of P to phosphonates was conserved under P-limitation, and further investigation revealed phosphonates were associated with …
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