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SAR11

  • Open Access
    Isolation of SAR11 Marine Bacteria from Cryopreserved Seawater
    Research Article | Applied and Environmental Science
    Isolation of SAR11 Marine Bacteria from Cryopreserved Seawater

    High-throughput dilution culture has proved to be a successful approach to bring some difficult-to-isolate planktonic microorganisms into culture, including the highly abundant SAR11 lineage of marine bacteria. While the long-term preservation of bacterial isolates by freezing them in the presence of cryoprotectants, such as glycerol, has been shown to be an effective method of storing viable cells over long time periods (i.e., years),...

    Elizabeth A. Monaghan, Kelle C. Freel, Michael S. Rappé
  • Open Access
    The Evolutionary Success of the Marine Bacterium SAR11 Analyzed through a Metagenomic Perspective
    Research Article | Ecological and Evolutionary Science
    The Evolutionary Success of the Marine Bacterium SAR11 Analyzed through a Metagenomic Perspective

    As the most abundant bacteria in oceans, the Pelagibacterales order (here SAR11) plays an important role in the global carbon cycle, but the study of the evolutionary forces driving its evolution has lagged considerably due to the inherent difficulty of obtaining pure cultures. Multiple evolutionary models have been proposed to explain the diversification of distinct lineages within a population; however, the identification of...

    Mario López-Pérez, Jose M. Haro-Moreno, Felipe Hernandes Coutinho, Manuel Martinez-Garcia, Francisco Rodriguez-Valera
  • Open Access
    Metagenome Mining Reveals Hidden Genomic Diversity of Pelagimyophages in Aquatic Environments
    Research Article | Applied and Environmental Science
    Metagenome Mining Reveals Hidden Genomic Diversity of Pelagimyophages in Aquatic Environments

    SAR11 clade members are among the most abundant bacteria on Earth. Their study is complicated by their great diversity and difficulties in being grown and manipulated in the laboratory. On the other hand, and due to their extraordinary abundance, metagenomic data sets provide enormous richness of information about these microbes. Given the major role played by phages in the lifestyle and evolution of prokaryotic cells, the contribution...

    Asier Zaragoza-Solas, Francisco Rodriguez-Valera, Mario López-Pérez
  • Open Access
    Wide Distribution of Phage That Infect Freshwater SAR11 Bacteria
    Editor's Pick Research Article | Applied and Environmental Science
    Wide Distribution of Phage That Infect Freshwater SAR11 Bacteria

    Fonsibacter represents a significant microbial group of freshwater ecosystems. Although the genomic and metabolic features of these bacteria have been well studied, no phage infecting them has been reported. In this study, we reconstructed complete genomes of Fonsibacter and infecting phage and revealed their close relatedness to the phage infecting marine SAR11 members. Also, we illustrated that phage that infect ...

    Lin-Xing Chen, Yanlin Zhao, Katherine D. McMahon, Jiro F. Mori, Gerdhard L. Jessen, Tara Colenbrander Nelson, Lesley A. Warren, Jillian F. Banfield
  • Open Access
    Elemental Composition, Phosphorous Uptake, and Characteristics of Growth of a SAR11 Strain in Batch and Continuous Culture
    Research Article | Ecological and Evolutionary Science
    Elemental Composition, Phosphorous Uptake, and Characteristics of Growth of a SAR11 Strain in Batch and Continuous Culture

    While SAR11 bacteria contribute a significant fraction to the total picoplankton biomass in the ocean and likely are major players in organic C and nutrient cycling, the cellular characteristics and metabolic features of most lineages have either only been hypothesized from genomes or otherwise not measured in controlled laboratory experimentation. The dearth of data on even the most basic characteristics for what is arguably the most...

    Scott R. Grant, Matthew J. Church, Sara Ferrón, Edward A. Laws, Michael S. Rappé
  • Open Access
    Reevaluating the Salty Divide: Phylogenetic Specificity of Transitions between Marine and Freshwater Systems
    Research Article | Ecological and Evolutionary Science
    Reevaluating the Salty Divide: Phylogenetic Specificity of Transitions between Marine and Freshwater Systems

    The distribution of microbial diversity across environments yields insight into processes that create and maintain this diversity as well as potential to infer how communities will respond to future environmental changes. We integrated data sets from dozens of freshwater lake and marine samples to compare diversity across open water habitats differing in salinity. Our novel combination of sequence-based approaches revealed lineages that...

    Sara F. Paver, Daniel Muratore, Ryan J. Newton, Maureen L. Coleman
  • Open Access
    Proteome Remodeling in Response to Sulfur Limitation in “<em>Candidatus</em> Pelagibacter ubique”
    Research Article | Molecular Biology and Physiology
    Proteome Remodeling in Response to Sulfur Limitation in “Candidatus Pelagibacter ubique”
    Daniel P. Smith, Carrie D. Nicora, Paul Carini, Mary S. Lipton, Angela D. Norbeck, Richard D. Smith, Stephen J. Giovannoni
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