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symbiosis

  • Open Access
    Metatranscriptomics by <em>In Situ</em> RNA Stabilization Directly and Comprehensively Revealed Episymbiotic Microbial Communities of Deep-Sea Squat Lobsters
    Research Article | Host-Microbe Biology
    Metatranscriptomics by In Situ RNA Stabilization Directly and Comprehensively Revealed Episymbiotic Microbial Communities of Deep-Sea Squat Lobsters

    Deep-sea hydrothermal vent ecosystems remain mysterious. To depict in detail the enigmatic life of chemosynthetic microbes, which are key primary producers in these ecosystems, metatranscriptomic analysis is expected to be a promising approach. However, this has been hindered by substantial perturbation (e.g., RNA degradation) during time-consuming retrieval from the deep sea. In this study, we conducted direct metatranscriptome...

    Kaori Motoki, Tomo-o Watsuji, Yoshihiro Takaki, Ken Takai, Wataru Iwasaki
  • Open Access
    Clade-Specific Sterol Metabolites in Dinoflagellate Endosymbionts Are Associated with Coral Bleaching in Response to Environmental Cues
    Research Article | Host-Microbe Biology
    Clade-Specific Sterol Metabolites in Dinoflagellate Endosymbionts Are Associated with Coral Bleaching in Response to Environmental Cues

    These results indicate that sterol metabolites in Symbiodiniaceae are clade specific, that their biosynthetic pathways share architectural and substrate specificity features with those of animals and plants, and that environmental stress-specific perturbation of sterol biosynthesis in dinoflagellates can impair a key mutualistic partnership for healthy reefs.

    Yandu Lu, Jiaoyun Jiang, Hongwei Zhao, Xiao Han, Yun Xiang, Wenxu Zhou
  • Open Access
    Microbial Strategies for Survival in the Glass Sponge <em>Vazella pourtalesii</em>
    Research Article | Host-Microbe Biology
    Microbial Strategies for Survival in the Glass Sponge Vazella pourtalesii

    We investigated the microbial community of V. pourtalesii that forms globally unique, monospecific sponge grounds under low-oxygen conditions on the Scotian Shelf, where it plays a key role in its vulnerable ecosystem. The microbial community was found to be concentrated within biomass patches and is dominated by small cells (<1 μm). MAG analyses showed consistently small genome sizes and low GC contents, which is unusual...

    Kristina Bayer, Kathrin Busch, Ellen Kenchington, Lindsay Beazley, Sören Franzenburg, Jan Michels, Ute Hentschel, Beate M. Slaby
  • Open Access
    Evolutionary Timeline and Genomic Plasticity Underlying the Lifestyle Diversity in <em>Rhizobiales</em>
    Research Article | Ecological and Evolutionary Science
    Evolutionary Timeline and Genomic Plasticity Underlying the Lifestyle Diversity in Rhizobiales

    Bacteria form diverse interactions with eukaryotic hosts. This is well represented by the Rhizobiales, a clade of Alphaproteobacteria strategically important for their large diversity of lifestyles with implications for agricultural and medical research. To investigate their lifestyle evolution, we compiled a comprehensive data set of genomes and lifestyle information for over 1,000 Rhizobiales genomes. We...

    Sishuo Wang, Andrew Meade, Hon-Ming Lam, Haiwei Luo
  • Open Access
    Synthetic Symbiosis under Environmental Disturbances
    Research Article | Synthetic Biology
    Synthetic Symbiosis under Environmental Disturbances

    The power of synthetic biology is immense. Will it, however, be able to withstand the environmental pressures once released in the wild. As new technologies aim to do precisely the same, we use a much simpler model to test mathematically the effect of a changing environment on a synthetic biological system. We assume that the system is successful if it maintains proportions close to what we observe in the laboratory. Extreme deviations...

    Jai A. Denton, Chaitanya S. Gokhale
  • Open Access
    Metabolic Analyses of Nitrogen Fixation in the Soybean Microsymbiont <span class="named-content genus-species" id="named-content-1">Sinorhizobium fredii</span> Using Constraint-Based Modeling
    Research Article | Host-Microbe Biology
    Metabolic Analyses of Nitrogen Fixation in the Soybean Microsymbiont Sinorhizobium fredii Using Constraint-Based Modeling

    Nitrogen is the most limiting macronutrient for plant growth, and rhizobia are important bacteria for agriculture because they can fix atmospheric nitrogen and make it available to legumes through the establishment of a symbiotic relationship with their host plants. In this work, we studied the nitrogen fixation process in the microsymbiont Sinorhizobium fredii at the...

    Carolina A. Contador, Siu-Kit Lo, Siu H. J. Chan, Hon-Ming Lam
  • Open Access
    Drug Repurposing of Bromodomain Inhibitors as Potential Novel Therapeutic Leads for Lymphatic Filariasis Guided by Multispecies Transcriptomics
    Research Article | Host-Microbe Biology
    Drug Repurposing of Bromodomain Inhibitors as Potential Novel Therapeutic Leads for Lymphatic Filariasis Guided by Multispecies Transcriptomics

    The current treatment regimen for lymphatic filariasis is mostly microfilaricidal. In an effort to identify new drug candidates for lymphatic filariasis, we conducted a three-way transcriptomics/systems biology study of one of the causative agents of lymphatic filariasis, Brugia malayi, its Wolbachia endosymbiont wBm, and its vector host...

    Matthew Chung, Laura E. Teigen, Silvia Libro, Robin E. Bromley, Dustin Olley, Nikhil Kumar, Lisa Sadzewicz, Luke J. Tallon, Anup Mahurkar, Jeremy M. Foster, Michelle L. Michalski, Julie C. Dunning Hotopp
  • Open Access
    Extensive Thioautotrophic Gill Endosymbiont Diversity within a Single <em>Ctena orbiculata</em> (Bivalvia: Lucinidae) Population and Implications for Defining Host-Symbiont Specificity and Species Recognition
    Research Article | Host-Microbe Biology
    Extensive Thioautotrophic Gill Endosymbiont Diversity within a Single Ctena orbiculata (Bivalvia: Lucinidae) Population and Implications for Defining Host-Symbiont Specificity and Species Recognition

    Symbiont diversity and host/symbiont functions have been comprehensively profiled for only a few lucinid species. In this work, unprecedented thioautotrophic gill endosymbiont taxonomic diversity was characterized within a Ctena orbiculata population associated with both seagrass- and alga-covered sediments. Endosymbiont metabolisms included known chemosynthetic functions and an additional conserved, previously uncharacterized...

    Shen Jean Lim, Louie Alexander, Annette Summers Engel, Audrey T. Paterson, Laurie C. Anderson, Barbara J. Campbell
  • Open Access
    Multipartner Symbiosis across Biological Domains: Looking at the Eukaryotic Associations from a Microbial Perspective
    Research Article | Host-Microbe Biology
    Multipartner Symbiosis across Biological Domains: Looking at the Eukaryotic Associations from a Microbial Perspective

    The symbiotic lifestyle represents a fundamental cryptic contribution to the diversity of marine ecosystems. Sponges are ideal targets to improve understanding the symbiotic relationships from evolutionary and ecological points of view, because they are the most ancient metazoans on earth, are ubiquitous in the marine benthos, and establish complex symbiosis with both prokaryotes and animals, which in turn also harbor their own...

    Marta Turon, Maria J. Uriz, Daniel Martin
  • Open Access
    The <em>Vibrio</em>-Squid Symbiosis as a Model for Studying Interbacterial Competition
    Special Issue Perspective | Host-Microbe Biology
    The Vibrio-Squid Symbiosis as a Model for Studying Interbacterial Competition

    The symbiosis between Euprymna scolopes squid and its bioluminescent bacterial symbiont, Vibrio fischeri, is a valuable model system to study a natural, coevolved host-microbe association. Over the past 30 years, researchers have developed and optimized many experimental methods to study both...

    Alecia N. Septer

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