Biochemical impacts of Hg in Mytilus galloprovincialis under present and predicted warming scenarios

Coppola, Francesca; Almeida, Ângela; Henriques, Bruno; Soares, Amadeu M.V.M.; Figueira, Etelvina; Pereira, Eduarda; Freitas, Rosa

doi:10.1016/j.scitotenv.2017.05.201

Cited by 99 publications

(58 citation statements)

References 90 publications

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“…Accordingly, Anestis et al (2007) demonstrated that M. galloprovincialis exposed to warming at 24 °C lead mussels to keep their valves closed for long periods and caused metabolic depression. Coppola et al (2017Coppola et al ( , 2018a also observed a significant decrease of ETS activity in M. galloprovincialis exposed to increased temperature (21 ºC).…”

Section: Accepted Manuscript 22mentioning

confidence: 81%

“…The highest LPO decrease observed in mussels under warming conditions and submersed compared to organisms exposed to tides may indicate that higher ROS production occurred in mussels exposed to tides which were not eliminated at the same rate by antioxidant defenses. For the same temperature (21 ºC), Coppola et al (2017Coppola et al ( , 2018a) observed a decrease of GSH/GSSG in M. galloprovincialis after 28 days of exposure, which may indicate oxidative stress as GSSG increased relative to GSH. In the same species, Kamel et al (2012) observed no differences in LPO in mussels exposed for 7 days to 20 ºC, but showed significant increase of LPO levels at 22 ºC.…”

Section: Accepted Manuscriptmentioning

confidence: 86%

“…Nonetheless, other studies have shown increase of energy reserves in M. galloprovincialis with the increase of temperature (Coppola et al, 2017(Coppola et al, , 2018a. Even so, the expenditure of energy reserves in bivalves under different stressful conditions has also been observed.…”

Section: Accepted Manuscript 23mentioning

confidence: 94%

“…Our results showed that, in comparison to control temperature, mussels submitted to warming, both submersed and exposed to tides, were able to increase their antioxidant defenses which led to lower LPO and PC levels in mussels exposed to these conditions. Coppola et al (2017) showed that M. galloprovincialis exposed to increased temperature (21 ºC) presented increased SOD activity after 28 days of exposure. Kamel et al (2012) showed increased CAT activity and LPO in the digestive gland of M. galloprovincialis under 22 ºC.…”

Section: Antioxidant Enzymesmentioning

confidence: 97%

“…In particular, transcriptomic and biochemical alterations have been observed in different bivalve species in response to temperature rise. M. galloprovincialis mussels showed an increase of antioxidant enzymes and metallothionein gene expression levels when exposed to heat stress (Banni et al, Coppola et al, 2017;2018a, 2018bFaggio et al, 2016;Freitas et al, 2018;Kristan et al, 2014;Sureda et al, 2011;Viarengo et al, 2007). Several studies have also demonstrated the ecological relevance of this species.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

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Are the effects induced by increased temperature enhanced in Mytilus galloprovincialis submitted to air exposure?

Andrade

Marchi

Soares

et al. 2019

Science of The Total Environment

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Intertidal mussel species are frequently exposed to changes of environmental parameters related to tidal regimes that include a multitude of stressors that they must avoid or tolerate by developing adaptive strategies. In particular, besides air exposure during low tides, intertidal mussels are also subjected to warming and, consequently, to higher risk of desiccation. However, scarce information is available regarding the responses of mussels to tidal regimes, particularly in the presence of other stressors such as increased temperature. Investigating the impacts of such combination of conditions will allow to understand the possible impacts that both factors interaction may generate to these intertidal organisms. To this end, the present study evaluated the impacts of different temperatures (18 °C and 21 °C) on Mytilus galloprovincialis when continuously submersed or exposed to a tidal regime for 14 days. Results showed that in mussels exposed to increased temperature under submersion conditions, the stress induced was enough to activate mussels' antioxidant defenses (namely glutathione peroxidase, GPx), preventing oxidative damage (lipid peroxidation, LPO; protein carbonylation, PC). In mussels exposed to tides at control temperature, metabolic capacity increased (electron transport system activity, ETS), and GPx was induced, despite resulting in increased LPO levels. Moreover, the combination of tides and temperature increase led to a significant decrease of lipid (LIP) content, activation of antioxidant defenses (superoxide dismutase, SOD; GPx) and increase of oxidized glutathione (GSSG), despite these mechanisms were not sufficient to prevent increased cellular damage. Therefore, the combination of increased temperature and air exposure induced higher oxidative stress in mussels. These findings indicate that increasing global warming could be more impacting to intertidal organisms compared to organisms continuously submersed. Furthermore, our results indicate that air exposure can act as a confounding factor when assessing the impacts of different stressors in organisms living in coastal systems.

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Section: Accepted Manuscript 22mentioning

confidence: 81%