An Explanation Based on Energy-Related Changes for Blue Mussel Mytilus edulis Coping With Seawater Acidification
As ocean acidification (OA) is gradually increasing, concerns regarding its ecological impacts on marine organisms are growing. Our previous studies have shown that seawater acidification exerted adverse effects on physiological processes of the blue mussel , and the aim of the present study was to...
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Veröffentlicht in: | Frontiers in physiology 2021-10, Vol.12, p.761117-761117 |
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Sprache: | eng |
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Zusammenfassung: | As ocean acidification (OA) is gradually increasing, concerns regarding its ecological impacts on marine organisms are growing. Our previous studies have shown that seawater acidification exerted adverse effects on physiological processes of the blue mussel
, and the aim of the present study was to obtain energy-related evidence to verify and explain our previous findings. Thus, the same acidification system (pH: 7.7 or 7.1; acidification method: HCl addition or CO
enrichment; experimental period: 21d) was set up, and the energy-related changes were assessed. The results showed that the energy charge (EC) and the gene expressions of cytochrome C oxidase (COX) reflecting the ATP synthesis rate increased significantly after acidification treatments. What's more, the mussels exposed to acidification allocated more energy to gills and hemocytes. However, the total adenylate pool (TAP) and the final adenosine triphosphate (ATP) in
decreased significantly, especially in CO
treatment group at pH 7.1. It was interesting to note that, TAP, ATP, and COXs gene expressions in CO
treatment groups were all significantly lower than that in HCl treatment groups at the same pH, verifying that CO
-induced acidification exhibited more deleterious impacts on
, and ions besides H
produced by CO
dissolution were possible causes. In conclusion, energy-related changes in
responded actively to seawater acidification and varied with different acidification conditions, while the constraints they had at higher acidification levels suggest that
will have a limited tolerance to increasing OA in the future. |
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ISSN: | 1664-042X 1664-042X |
DOI: | 10.3389/fphys.2021.761117 |