The time course of molecular acclimation to seawater in a euryhaline fish

Abstract The Arabian pupfish, Aphanius dispar, is a euryhaline fish inhabiting both inland nearly-freshwater desert ponds and highly saline Red Sea coastal lagoons of the Arabian Peninsula. Desert ponds and coastal lagoons, located respectively upstream and at the mouths of dry riverbeds (“wadies”),...

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Autores principales: Lucrezia C. Bonzi, Alison A. Monroe, Robert Lehmann, Michael L. Berumen, Timothy Ravasi, Celia Schunter
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Publicado: Nature Portfolio 2021
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Acceso en línea:https://doaj.org/article/36bbecff78084603b21f19f3d6298c28
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spelling oai:doaj.org-article:36bbecff78084603b21f19f3d6298c282021-12-02T15:31:36ZThe time course of molecular acclimation to seawater in a euryhaline fish10.1038/s41598-021-97295-32045-2322https://doaj.org/article/36bbecff78084603b21f19f3d6298c282021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97295-3https://doaj.org/toc/2045-2322Abstract The Arabian pupfish, Aphanius dispar, is a euryhaline fish inhabiting both inland nearly-freshwater desert ponds and highly saline Red Sea coastal lagoons of the Arabian Peninsula. Desert ponds and coastal lagoons, located respectively upstream and at the mouths of dry riverbeds (“wadies”), have been found to potentially become connected during periods of intense rainfall, which could allow the fish to migrate between these different habitats. Flash floods would therefore flush Arabian pupfish out to sea, requiring a rapid acclimation to a greater than 40 ppt change in salinity. To investigate the molecular pathways of salinity acclimation during such events, a Red Sea coastal lagoon and a desert pond population were sampled, with the latter exposed to a rapid increase in water salinity. Changes in branchial gene expression were investigated via genome-wide transcriptome measurements over time from 6 h to 21 days. The two natural populations displayed basal differences in genes related to ion transport, osmoregulation and immune system functions. These mechanisms were also differentially regulated in seawater transferred fish, revealing their crucial role in long-term adaptation. Other processes were only transiently activated shortly after the salinity exposure, including cellular stress response mechanisms, such as molecular chaperone synthesis and apoptosis. Tissue remodelling processes were also identified as transient, but took place later in the timeline, suggesting their importance to long-term acclimation as they likely equip the fish with lasting adaptations to their new environment. The alterations in branchial functional pathways displayed by Arabian pupfish in response to salinity increases are diverse. These reveal a large toolkit of molecular processes important for adaptation to hyperosmolarity that allow for successful colonization to a wide variety of different habitats.Lucrezia C. BonziAlison A. MonroeRobert LehmannMichael L. BerumenTimothy RavasiCelia SchunterNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-16 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Lucrezia C. Bonzi
Alison A. Monroe
Robert Lehmann
Michael L. Berumen
Timothy Ravasi
Celia Schunter
The time course of molecular acclimation to seawater in a euryhaline fish
description Abstract The Arabian pupfish, Aphanius dispar, is a euryhaline fish inhabiting both inland nearly-freshwater desert ponds and highly saline Red Sea coastal lagoons of the Arabian Peninsula. Desert ponds and coastal lagoons, located respectively upstream and at the mouths of dry riverbeds (“wadies”), have been found to potentially become connected during periods of intense rainfall, which could allow the fish to migrate between these different habitats. Flash floods would therefore flush Arabian pupfish out to sea, requiring a rapid acclimation to a greater than 40 ppt change in salinity. To investigate the molecular pathways of salinity acclimation during such events, a Red Sea coastal lagoon and a desert pond population were sampled, with the latter exposed to a rapid increase in water salinity. Changes in branchial gene expression were investigated via genome-wide transcriptome measurements over time from 6 h to 21 days. The two natural populations displayed basal differences in genes related to ion transport, osmoregulation and immune system functions. These mechanisms were also differentially regulated in seawater transferred fish, revealing their crucial role in long-term adaptation. Other processes were only transiently activated shortly after the salinity exposure, including cellular stress response mechanisms, such as molecular chaperone synthesis and apoptosis. Tissue remodelling processes were also identified as transient, but took place later in the timeline, suggesting their importance to long-term acclimation as they likely equip the fish with lasting adaptations to their new environment. The alterations in branchial functional pathways displayed by Arabian pupfish in response to salinity increases are diverse. These reveal a large toolkit of molecular processes important for adaptation to hyperosmolarity that allow for successful colonization to a wide variety of different habitats.
format article
author Lucrezia C. Bonzi
Alison A. Monroe
Robert Lehmann
Michael L. Berumen
Timothy Ravasi
Celia Schunter
author_facet Lucrezia C. Bonzi
Alison A. Monroe
Robert Lehmann
Michael L. Berumen
Timothy Ravasi
Celia Schunter
author_sort Lucrezia C. Bonzi
title The time course of molecular acclimation to seawater in a euryhaline fish
title_short The time course of molecular acclimation to seawater in a euryhaline fish
title_full The time course of molecular acclimation to seawater in a euryhaline fish
title_fullStr The time course of molecular acclimation to seawater in a euryhaline fish
title_full_unstemmed The time course of molecular acclimation to seawater in a euryhaline fish
title_sort time course of molecular acclimation to seawater in a euryhaline fish
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/36bbecff78084603b21f19f3d6298c28
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