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  • Articles
    • Latest Articles
    • COVID-19 Research and News from ASM Journals
    • mSphere of Influence: Commentaries from Early Career Microbiologists
    • Archive
  • Topics
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    • Molecular Biology and Physiology
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Ecological and Evolutionary Science

  • Open Access
    Bacterial Stabilization of a Panel of Picornaviruses
    Research Article | Ecological and Evolutionary Science
    Bacterial Stabilization of a Panel of Picornaviruses

    Recent studies have shown that bacteria promote infection and stabilization of poliovirus particles, but the breadth of these effects on other members of the Picornaviridae family is unknown. Here, we compared the effects of bacteria on four distinct members of the Picornaviridae family. We found that bacteria reduced inactivation of all of the viruses during bleach treatment, but not all viral strains were stabilized...

    Elizabeth R. Aguilera, Y Nguyen, Jun Sasaki, Julie K. Pfeiffer
  • Open Access
    Loss and Gain in the Evolution of the <em>Salmonella enterica</em> Serovar Gallinarum Biovar Pullorum Genome
    Research Article | Ecological and Evolutionary Science
    Loss and Gain in the Evolution of the Salmonella enterica Serovar Gallinarum Biovar Pullorum Genome

    Pullorum disease, an acute poultry septicemia caused by Salmonella Gallinarum biovar Pullorum, is fatal for young chickens and is a heavy burden on poultry industry. The pathogen is rare in most developed countries but still extremely difficult to eliminate in China. Efficient epidemiological surveillance necessitates clarifying the origin of the isolates from different regions and their phylogenic relationships. Genomic...

    Yachen Hu, Zhenyu Wang, Bin Qiang, Yaohui Xu, Xiang Chen, Qiuchun Li, Xinan Jiao
  • Open Access
    Native and Invading Yellow Starthistle (<span class="named-content genus-species" id="named-content-1">Centaurea solstitialis</span>) Microbiomes Differ in Composition and Diversity of Bacteria
    Research Article | Ecological and Evolutionary Science
    Native and Invading Yellow Starthistle (Centaurea solstitialis) Microbiomes Differ in Composition and Diversity of Bacteria

    Previous studies have found that introduced plants commonly experience more favorable microbial interactions in their non-native range, suggesting that changes to the microbiome could be an important contributor to invasion success. Little is known about microbiome variation across native and invading populations, however, and the potential sources of more favorable interactions are undescribed. Here, we report one of the first...

    Patricia Lu-Irving, Julia G. Harenčár, Hailey Sounart, Shana R. Welles, Sarah M. Swope, David A. Baltrus, Katrina M. Dlugosch
  • Open Access
    Microbial Community Succession and Nutrient Cycling Responses following Perturbations of Experimental Saltwater Aquaria
    Research Article | Ecological and Evolutionary Science
    Microbial Community Succession and Nutrient Cycling Responses following Perturbations of Experimental Saltwater Aquaria

    Saltwater aquaria are living systems that support a complex biological community of fish, invertebrates, and microbes. The health and maintenance of saltwater tanks are pressing concerns for home hobbyists, zoos, and professionals in the aquarium trade; however, we do not yet understand the underlying microbial species interactions and community dynamics which contribute to tank setup and conditioning. This report provides a detailed...

    Holly M. Bik, Alexandra Alexiev, Sabreen K. Aulakh, Lakshmi Bharadwaj, Jennifer Flanagan, John M. Haggerty, Sarah M. Hird, Guillaume Jospin, Jenna M. Lang, Laura A. Sauder, Josh D. Neufeld, Andrew Shaver, Akshay Sethi, Jonathan A. Eisen, David A. Coil
  • Open Access
    Characterizing the Pathogenic, Genomic, and Chemical Traits of <em>Aspergillus fischeri</em>, a Close Relative of the Major Human Fungal Pathogen <em>Aspergillus fumigatus</em>
    Editor's Pick Research Article | Ecological and Evolutionary Science
    Characterizing the Pathogenic, Genomic, and Chemical Traits of Aspergillus fischeri, a Close Relative of the Major Human Fungal Pathogen Aspergillus fumigatus

    Aspergillus fumigatus is the primary cause of aspergillosis, a devastating ensemble of diseases associated with severe morbidity and mortality worldwide. A. fischeri is a close relative of A. fumigatus but is not generally...

    Matthew E. Mead, Sonja L. Knowles, Huzefa A. Raja, Sarah R. Beattie, Caitlin H. Kowalski, Jacob L. Steenwyk, Lilian P. Silva, Jessica Chiaratto, Laure N. A. Ries, Gustavo H. Goldman, Robert A. Cramer, Nicholas H. Oberlies, Antonis Rokas
  • Open Access
    Gene Expansion and Positive Selection as Bacterial Adaptations to Oligotrophic Conditions
    Research Article | Ecological and Evolutionary Science
    Gene Expansion and Positive Selection as Bacterial Adaptations to Oligotrophic Conditions

    By combining a genome-centric metagenomic approach with a culture-based approach, we investigated the genomic adaptations of prevalent populations in an engineered oligotrophic freshwater system. We found evidence for widespread positive selection on genes involved in phosphorus and carbon scavenging pathways and for gene expansions in motility and environmental sensing to be important genomic adaptations of the abundant taxon in this...

    Ruben Props, Pieter Monsieurs, Peter Vandamme, Natalie Leys, Vincent J. Denef, Nico Boon
  • Open Access
    The Phylogenomic Diversity of Herbivore-Associated <em>Fibrobacter</em> spp. Is Correlated to Lignocellulose-Degrading Potential
    Research Article | Ecological and Evolutionary Science
    The Phylogenomic Diversity of Herbivore-Associated Fibrobacter spp. Is Correlated to Lignocellulose-Degrading Potential

    The herbivore gut microbiome is incredibly diverse, and a functional understanding of this diversity is needed to more reliably manipulate this community for specific gain, such as increased production in ruminant livestock. Microbial degraders of plant cell wall polysaccharides in the herbivore gut, particularly Fibrobacter spp., are of fundamental importance to their hosts for digestion of a diet consisting primarily of...

    Anthony P. Neumann, Garret Suen
  • Open Access
    Identification of an Exceptionally Long Intron in the <em>HAC1</em> Gene of <em>Candida parapsilosis</em>
    Editor's Pick Research Article | Ecological and Evolutionary Science
    Identification of an Exceptionally Long Intron in the HAC1 Gene of Candida parapsilosis

    The unfolded protein response (UPR) responds to the build-up of misfolded proteins in the endoplasmic reticulum. The UPR has wide-ranging functions from fungal pathogenesis to applications in biotechnology. The UPR is regulated through the splicing of an unconventional intron in the HAC1 gene. This intron has been described in many fungal species and is of variable length. Until now it was believed that some members of the CTG-...

    Elise Iracane, Paul D. Donovan, Mihaela Ola, Geraldine Butler, Linda M. Holland
  • Open Access
    The Enterococcus Cassette Chromosome, a Genomic Variation Enabler in Enterococci
    Research Article | Ecological and Evolutionary Science
    The Enterococcus Cassette Chromosome, a Genomic Variation Enabler in Enterococci

    Enterococcus faecium is a bacterium found in a great variety of environments, ranging from the clinic as a nosocomial pathogen to natural habitats such as mammalian intestines, water, and soil. They are known to exchange genetic material through horizontal gene transfer and recombination, leading to great variability of accessory genes and aiding environmental...

    A. Sivertsen, J. Janice, T. Pedersen, T. M. Wagner, J. Hegstad, K. Hegstad
  • Open Access
    TaxAss: Leveraging a Custom Freshwater Database Achieves Fine-Scale Taxonomic Resolution
    Research Article | Ecological and Evolutionary Science
    TaxAss: Leveraging a Custom Freshwater Database Achieves Fine-Scale Taxonomic Resolution

    Microbial communities drive ecosystem processes, but microbial community composition analyses using 16S rRNA gene amplicon data sets are limited by the lack of fine-resolution taxonomy classifications. Coarse taxonomic groupings at the phylum, class, and order levels lump ecologically distinct organisms together. To avoid this, many researchers define operational taxonomic units (OTUs) based on clustered sequences, sequence variants, or...

    Robin R. Rohwer, Joshua J. Hamilton, Ryan J. Newton, Katherine D. McMahon

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