Geographical structure of endosymbiotic bacteria hosted by Bathymodiolus mussels at eastern Pacific hydrothermal vents
Abstract Background Chemolithoautotrophic primary production sustains dense invertebrate communities at deep-sea hydrothermal vents and hydrocarbon seeps. Symbiotic bacteria that oxidize dissolved sulfur, methane, and hydrogen gases nourish bathymodiolin mussels that thrive in these environments wor...
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ftdatacite:10.6084/m9.figshare.c.3791164 2023-05-15T13:43:34+02:00 Geographical structure of endosymbiotic bacteria hosted by Bathymodiolus mussels at eastern Pacific hydrothermal vents Phuong-Thao Ho Eunji Park Hong, Soon Kim, Eun-Hye Kangchon Kim Sook-Jin Jang Vrijenhoek, Robert Won, Yong-Jin 2017 https://dx.doi.org/10.6084/m9.figshare.c.3791164 https://figshare.com/collections/Geographical_structure_of_endosymbiotic_bacteria_hosted_by_Bathymodiolus_mussels_at_eastern_Pacific_hydrothermal_vents/3791164 unknown Figshare https://dx.doi.org/10.1186/s12862-017-0966-3 CC BY https://creativecommons.org/licenses/by/4.0 CC-BY Microbiology FOS Biological sciences Genetics Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences Collection article 2017 ftdatacite https://doi.org/10.6084/m9.figshare.c.3791164 https://doi.org/10.1186/s12862-017-0966-3 2021-11-05T12:55:41Z Abstract Background Chemolithoautotrophic primary production sustains dense invertebrate communities at deep-sea hydrothermal vents and hydrocarbon seeps. Symbiotic bacteria that oxidize dissolved sulfur, methane, and hydrogen gases nourish bathymodiolin mussels that thrive in these environments worldwide. The mussel symbionts are newly acquired in each generation via infection by free-living forms. This study examined geographical subdivision of the thiotrophic endosymbionts hosted by Bathymodiolus mussels living along the eastern Pacific hydrothermal vents. High-throughput sequencing data of 16S ribosomal RNA encoding gene and fragments of six protein-coding genes of symbionts were examined in the samples collected from nine vent localities at the East Pacific Rise, GalĂĄpagos Rift, and Pacific-Antarctic Ridge. Results Both of the parapatric sister-species, B. thermophilus and B. antarcticus, hosted the same numerically dominant phylotype of thiotrophic Gammaproteobacteria. However, sequences from six protein-coding genes revealed highly divergent symbiont lineages living north and south of the Easter Microplate and hosted by these two Bathymodiolus mussel species. High heterogeneity of symbiont haplotypes among host individuals sampled from the same location suggested that stochasticity associated with initial infections was amplified as symbionts proliferated within the host individuals. The mussel species presently contact one another and hybridize along the Easter Microplate, but the northern and southern symbionts appear to be completely isolated. Vicariance associated with orogeny of the Easter Microplate region, 2.5â 5.3 million years ago, may have initiated isolation of the symbiont and host populations. Estimates of synonymous substitution rates for the protein-coding bacterial genes examined in this study were 0.77â 1.62%/nucleotide/million years. Conclusions Our present study reports the most comprehensive population genetic analyses of the chemosynthetic endosymbiotic bacteria based on high-throughput genetic data and extensive geographical sampling to date, and demonstrates the role of the geographical features, the Easter Microplate and geographical distance, in the intraspecific divergence of this bacterial species along the mid-ocean ridge axes in the eastern Pacific. Altogether, our results provide insights into extrinsic and intrinsic factors affecting the dispersal and evolution of chemosynthetic symbiotic partners in the hydrothermal vents along the eastern Pacific Ocean. Article in Journal/Newspaper Antarc* Antarctic antarcticus DataCite Metadata Store (German National Library of Science and Technology) Antarctic Pacific |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Microbiology FOS Biological sciences Genetics Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences |
spellingShingle |
Microbiology FOS Biological sciences Genetics Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences Phuong-Thao Ho Eunji Park Hong, Soon Kim, Eun-Hye Kangchon Kim Sook-Jin Jang Vrijenhoek, Robert Won, Yong-Jin Geographical structure of endosymbiotic bacteria hosted by Bathymodiolus mussels at eastern Pacific hydrothermal vents |
topic_facet |
Microbiology FOS Biological sciences Genetics Evolutionary Biology 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Inorganic Chemistry FOS Chemical sciences |
description |
Abstract Background Chemolithoautotrophic primary production sustains dense invertebrate communities at deep-sea hydrothermal vents and hydrocarbon seeps. Symbiotic bacteria that oxidize dissolved sulfur, methane, and hydrogen gases nourish bathymodiolin mussels that thrive in these environments worldwide. The mussel symbionts are newly acquired in each generation via infection by free-living forms. This study examined geographical subdivision of the thiotrophic endosymbionts hosted by Bathymodiolus mussels living along the eastern Pacific hydrothermal vents. High-throughput sequencing data of 16S ribosomal RNA encoding gene and fragments of six protein-coding genes of symbionts were examined in the samples collected from nine vent localities at the East Pacific Rise, GalĂĄpagos Rift, and Pacific-Antarctic Ridge. Results Both of the parapatric sister-species, B. thermophilus and B. antarcticus, hosted the same numerically dominant phylotype of thiotrophic Gammaproteobacteria. However, sequences from six protein-coding genes revealed highly divergent symbiont lineages living north and south of the Easter Microplate and hosted by these two Bathymodiolus mussel species. High heterogeneity of symbiont haplotypes among host individuals sampled from the same location suggested that stochasticity associated with initial infections was amplified as symbionts proliferated within the host individuals. The mussel species presently contact one another and hybridize along the Easter Microplate, but the northern and southern symbionts appear to be completely isolated. Vicariance associated with orogeny of the Easter Microplate region, 2.5â 5.3 million years ago, may have initiated isolation of the symbiont and host populations. Estimates of synonymous substitution rates for the protein-coding bacterial genes examined in this study were 0.77â 1.62%/nucleotide/million years. Conclusions Our present study reports the most comprehensive population genetic analyses of the chemosynthetic endosymbiotic bacteria based on high-throughput genetic data and extensive geographical sampling to date, and demonstrates the role of the geographical features, the Easter Microplate and geographical distance, in the intraspecific divergence of this bacterial species along the mid-ocean ridge axes in the eastern Pacific. Altogether, our results provide insights into extrinsic and intrinsic factors affecting the dispersal and evolution of chemosynthetic symbiotic partners in the hydrothermal vents along the eastern Pacific Ocean. |
format |
Article in Journal/Newspaper |
author |
Phuong-Thao Ho Eunji Park Hong, Soon Kim, Eun-Hye Kangchon Kim Sook-Jin Jang Vrijenhoek, Robert Won, Yong-Jin |
author_facet |
Phuong-Thao Ho Eunji Park Hong, Soon Kim, Eun-Hye Kangchon Kim Sook-Jin Jang Vrijenhoek, Robert Won, Yong-Jin |
author_sort |
Phuong-Thao Ho |
title |
Geographical structure of endosymbiotic bacteria hosted by Bathymodiolus mussels at eastern Pacific hydrothermal vents |
title_short |
Geographical structure of endosymbiotic bacteria hosted by Bathymodiolus mussels at eastern Pacific hydrothermal vents |
title_full |
Geographical structure of endosymbiotic bacteria hosted by Bathymodiolus mussels at eastern Pacific hydrothermal vents |
title_fullStr |
Geographical structure of endosymbiotic bacteria hosted by Bathymodiolus mussels at eastern Pacific hydrothermal vents |
title_full_unstemmed |
Geographical structure of endosymbiotic bacteria hosted by Bathymodiolus mussels at eastern Pacific hydrothermal vents |
title_sort |
geographical structure of endosymbiotic bacteria hosted by bathymodiolus mussels at eastern pacific hydrothermal vents |
publisher |
Figshare |
publishDate |
2017 |
url |
https://dx.doi.org/10.6084/m9.figshare.c.3791164 https://figshare.com/collections/Geographical_structure_of_endosymbiotic_bacteria_hosted_by_Bathymodiolus_mussels_at_eastern_Pacific_hydrothermal_vents/3791164 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic antarcticus |
genre_facet |
Antarc* Antarctic antarcticus |
op_relation |
https://dx.doi.org/10.1186/s12862-017-0966-3 |
op_rights |
CC BY https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.c.3791164 https://doi.org/10.1186/s12862-017-0966-3 |
_version_ |
1766190654963056640 |