Response of Coastal Shewanella and Duganella Bacteria to Planktonic and Terrestrial Food Substrates
Global warming scenarios indicate that in subarctic regions, the precipitation will increase in the future. Coastal bacteria will thus receive increasing organic carbon sources from land runoff. How such changes will affect the function and taxonomic composition of coastal bacteria is poorly known....
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Online Access: | http://dx.doi.org/10.3389/fmicb.2021.726844 https://www.frontiersin.org/articles/10.3389/fmicb.2021.726844/full |
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crfrontiers:10.3389/fmicb.2021.726844 2024-02-11T10:08:59+01:00 Response of Coastal Shewanella and Duganella Bacteria to Planktonic and Terrestrial Food Substrates Zhao, Li Brugel, Sonia Ramasamy, Kesava Priyan Andersson, Agneta Svenska Forskningsrådet Formas 2022 http://dx.doi.org/10.3389/fmicb.2021.726844 https://www.frontiersin.org/articles/10.3389/fmicb.2021.726844/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Microbiology volume 12 ISSN 1664-302X Microbiology (medical) Microbiology journal-article 2022 crfrontiers https://doi.org/10.3389/fmicb.2021.726844 2024-01-26T09:58:38Z Global warming scenarios indicate that in subarctic regions, the precipitation will increase in the future. Coastal bacteria will thus receive increasing organic carbon sources from land runoff. How such changes will affect the function and taxonomic composition of coastal bacteria is poorly known. We performed a 10-day experiment with two isolated bacteria: Shewanella baltica from a seaside location and Duganella sp. from a river mouth, and provided them with a plankton and a river extract as food substrate. The bacterial growth and carbon consumption were monitored over the experimental period. Shewanella and Duganella consumed 40% and 30% of the plankton extract, respectively, while the consumption of the river extract was low for both bacteria, ∼1%. Shewanella showed the highest bacterial growth efficiency (BGE) (12%) when grown on plankton extract, while when grown on river extract, the BGE was only 1%. Duganella showed low BGE when grown on plankton extract (< 1%) and slightly higher BGE when grown on river extract (2%). The cell growth yield of Duganella was higher than that of Shewanella when grown on river extract. These results indicate that Duganella is more adapted to terrestrial organic substrates with low nutritional availability, while Shewanella is adapted to eutrophied conditions. The different growth performance of the bacteria could be traced to genomic variations. A closely related genome of Shewanella was shown to harbor genes for the sequestration of autochthonously produced carbon substrates, while Duganella contained genes for the degradation of relatively refractive terrestrial organic matter. The results may reflect the influence of environmental drivers on bacterial community composition in natural aquatic environments. Elevated inflows of terrestrial organic matter to coastal areas in subarctic regions would lead to increased occurrence of bacteria adapted to the degradation of complex terrestrial compounds with a low bioavailability. Article in Journal/Newspaper Subarctic Frontiers (Publisher) Frontiers in Microbiology 12 |
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Frontiers (Publisher) |
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language |
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topic |
Microbiology (medical) Microbiology |
spellingShingle |
Microbiology (medical) Microbiology Zhao, Li Brugel, Sonia Ramasamy, Kesava Priyan Andersson, Agneta Response of Coastal Shewanella and Duganella Bacteria to Planktonic and Terrestrial Food Substrates |
topic_facet |
Microbiology (medical) Microbiology |
description |
Global warming scenarios indicate that in subarctic regions, the precipitation will increase in the future. Coastal bacteria will thus receive increasing organic carbon sources from land runoff. How such changes will affect the function and taxonomic composition of coastal bacteria is poorly known. We performed a 10-day experiment with two isolated bacteria: Shewanella baltica from a seaside location and Duganella sp. from a river mouth, and provided them with a plankton and a river extract as food substrate. The bacterial growth and carbon consumption were monitored over the experimental period. Shewanella and Duganella consumed 40% and 30% of the plankton extract, respectively, while the consumption of the river extract was low for both bacteria, ∼1%. Shewanella showed the highest bacterial growth efficiency (BGE) (12%) when grown on plankton extract, while when grown on river extract, the BGE was only 1%. Duganella showed low BGE when grown on plankton extract (< 1%) and slightly higher BGE when grown on river extract (2%). The cell growth yield of Duganella was higher than that of Shewanella when grown on river extract. These results indicate that Duganella is more adapted to terrestrial organic substrates with low nutritional availability, while Shewanella is adapted to eutrophied conditions. The different growth performance of the bacteria could be traced to genomic variations. A closely related genome of Shewanella was shown to harbor genes for the sequestration of autochthonously produced carbon substrates, while Duganella contained genes for the degradation of relatively refractive terrestrial organic matter. The results may reflect the influence of environmental drivers on bacterial community composition in natural aquatic environments. Elevated inflows of terrestrial organic matter to coastal areas in subarctic regions would lead to increased occurrence of bacteria adapted to the degradation of complex terrestrial compounds with a low bioavailability. |
author2 |
Svenska Forskningsrådet Formas |
format |
Article in Journal/Newspaper |
author |
Zhao, Li Brugel, Sonia Ramasamy, Kesava Priyan Andersson, Agneta |
author_facet |
Zhao, Li Brugel, Sonia Ramasamy, Kesava Priyan Andersson, Agneta |
author_sort |
Zhao, Li |
title |
Response of Coastal Shewanella and Duganella Bacteria to Planktonic and Terrestrial Food Substrates |
title_short |
Response of Coastal Shewanella and Duganella Bacteria to Planktonic and Terrestrial Food Substrates |
title_full |
Response of Coastal Shewanella and Duganella Bacteria to Planktonic and Terrestrial Food Substrates |
title_fullStr |
Response of Coastal Shewanella and Duganella Bacteria to Planktonic and Terrestrial Food Substrates |
title_full_unstemmed |
Response of Coastal Shewanella and Duganella Bacteria to Planktonic and Terrestrial Food Substrates |
title_sort |
response of coastal shewanella and duganella bacteria to planktonic and terrestrial food substrates |
publisher |
Frontiers Media SA |
publishDate |
2022 |
url |
http://dx.doi.org/10.3389/fmicb.2021.726844 https://www.frontiersin.org/articles/10.3389/fmicb.2021.726844/full |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Frontiers in Microbiology volume 12 ISSN 1664-302X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmicb.2021.726844 |
container_title |
Frontiers in Microbiology |
container_volume |
12 |
_version_ |
1790608664431689728 |