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Physiological dynamics of chemosynthetic symbionts in hydrothermal vent snails
Symbioses between invertebrate animals and chemosynthetic bacteria form the basis of hydrothermal vent ecosystems worldwide. In the Lau Basin, deep-sea vent snails of the genus Alviniconcha associate with either Gammaproteobacteria (A. kojimai, A. strummeri) or Campylobacteria (A. boucheti) that use...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7490688/ https://www.ncbi.nlm.nih.gov/pubmed/32616905 http://dx.doi.org/10.1038/s41396-020-0707-2 |
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author | Breusing, Corinna Mitchell, Jessica Delaney, Jennifer Sylva, Sean P. Seewald, Jeffrey S. Girguis, Peter R. Beinart, Roxanne A. |
author_facet | Breusing, Corinna Mitchell, Jessica Delaney, Jennifer Sylva, Sean P. Seewald, Jeffrey S. Girguis, Peter R. Beinart, Roxanne A. |
author_sort | Breusing, Corinna |
collection | PubMed |
description | Symbioses between invertebrate animals and chemosynthetic bacteria form the basis of hydrothermal vent ecosystems worldwide. In the Lau Basin, deep-sea vent snails of the genus Alviniconcha associate with either Gammaproteobacteria (A. kojimai, A. strummeri) or Campylobacteria (A. boucheti) that use sulfide and/or hydrogen as energy sources. While the A. boucheti host–symbiont combination (holobiont) dominates at vents with higher concentrations of sulfide and hydrogen, the A. kojimai and A. strummeri holobionts are more abundant at sites with lower concentrations of these reductants. We posit that adaptive differences in symbiont physiology and gene regulation might influence the observed niche partitioning between host taxa. To test this hypothesis, we used high-pressure respirometers to measure symbiont metabolic rates and examine changes in gene expression among holobionts exposed to in situ concentrations of hydrogen (H(2): ~25 µM) or hydrogen sulfide (H(2)S: ~120 µM). The campylobacterial symbiont exhibited the lowest rate of H(2)S oxidation but the highest rate of H(2) oxidation, with fewer transcriptional changes and less carbon fixation relative to the gammaproteobacterial symbionts under each experimental condition. These data reveal potential physiological adaptations among symbiont types, which may account for the observed net differences in metabolic activity and contribute to the observed niche segregation among holobionts. |
format | Online Article Text |
id | pubmed-7490688 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-74906882020-10-01 Physiological dynamics of chemosynthetic symbionts in hydrothermal vent snails Breusing, Corinna Mitchell, Jessica Delaney, Jennifer Sylva, Sean P. Seewald, Jeffrey S. Girguis, Peter R. Beinart, Roxanne A. ISME J Article Symbioses between invertebrate animals and chemosynthetic bacteria form the basis of hydrothermal vent ecosystems worldwide. In the Lau Basin, deep-sea vent snails of the genus Alviniconcha associate with either Gammaproteobacteria (A. kojimai, A. strummeri) or Campylobacteria (A. boucheti) that use sulfide and/or hydrogen as energy sources. While the A. boucheti host–symbiont combination (holobiont) dominates at vents with higher concentrations of sulfide and hydrogen, the A. kojimai and A. strummeri holobionts are more abundant at sites with lower concentrations of these reductants. We posit that adaptive differences in symbiont physiology and gene regulation might influence the observed niche partitioning between host taxa. To test this hypothesis, we used high-pressure respirometers to measure symbiont metabolic rates and examine changes in gene expression among holobionts exposed to in situ concentrations of hydrogen (H(2): ~25 µM) or hydrogen sulfide (H(2)S: ~120 µM). The campylobacterial symbiont exhibited the lowest rate of H(2)S oxidation but the highest rate of H(2) oxidation, with fewer transcriptional changes and less carbon fixation relative to the gammaproteobacterial symbionts under each experimental condition. These data reveal potential physiological adaptations among symbiont types, which may account for the observed net differences in metabolic activity and contribute to the observed niche segregation among holobionts. Nature Publishing Group UK 2020-07-02 2020-10 /pmc/articles/PMC7490688/ /pubmed/32616905 http://dx.doi.org/10.1038/s41396-020-0707-2 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Breusing, Corinna Mitchell, Jessica Delaney, Jennifer Sylva, Sean P. Seewald, Jeffrey S. Girguis, Peter R. Beinart, Roxanne A. Physiological dynamics of chemosynthetic symbionts in hydrothermal vent snails |
title | Physiological dynamics of chemosynthetic symbionts in hydrothermal vent snails |
title_full | Physiological dynamics of chemosynthetic symbionts in hydrothermal vent snails |
title_fullStr | Physiological dynamics of chemosynthetic symbionts in hydrothermal vent snails |
title_full_unstemmed | Physiological dynamics of chemosynthetic symbionts in hydrothermal vent snails |
title_short | Physiological dynamics of chemosynthetic symbionts in hydrothermal vent snails |
title_sort | physiological dynamics of chemosynthetic symbionts in hydrothermal vent snails |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7490688/ https://www.ncbi.nlm.nih.gov/pubmed/32616905 http://dx.doi.org/10.1038/s41396-020-0707-2 |
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