Characterisation of antioxidant defences in three Antarctic notothenioid species from Terra Nova Bay (Ross Sea).
Oxidative challenge is an important factor affecting the adaptive strategies of Antarctic fish, but data on antioxidant defences in these organisms remain scarce. In this investigation, individual antioxidants and the total oxyradical scavenging capacity (TOSC) were characterised in three notothenio...
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Editore Gordon and Breach Science Publishers Taylor & Francis Limited:Rankine Road, Basingstoke RG24 8PR United Kingdom:011 44 1256 813035, EMAIL: madeline.sims@tandf.co.uk, info@tandf.co.uk, INTERNET: http://www.tandf.co.uk, Fax: 011 44 1256 330245
2010
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Online Access: | http://hdl.handle.net/11566/28771 https://doi.org/10.1080/02757541003789066 |
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ftupmarcheiris:oai:iris.univpm.it:11566/28771 2024-04-14T08:02:59+00:00 Characterisation of antioxidant defences in three Antarctic notothenioid species from Terra Nova Bay (Ross Sea). BENEDETTI, MAURA REGOLI, Francesco Marco, Nigro Benedetti, Maura Marco, Nigro Regoli, Francesco 2010 ELETTRONICO http://hdl.handle.net/11566/28771 https://doi.org/10.1080/02757541003789066 eng eng Editore Gordon and Breach Science Publishers Taylor & Francis Limited:Rankine Road, Basingstoke RG24 8PR United Kingdom:011 44 1256 813035, EMAIL: madeline.sims@tandf.co.uk, info@tandf.co.uk, INTERNET: http://www.tandf.co.uk, Fax: 011 44 1256 330245 info:eu-repo/semantics/altIdentifier/wos/WOS:000280264900006 volume:26 issue:4 firstpage:305 lastpage:314 numberofpages:10 journal:CHEMISTRY IN ECOLOGY http://hdl.handle.net/11566/28771 doi:10.1080/02757541003789066 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-77954843902 Adaptation Antioxidants Oxidative stress Seasonal fluctuations Total oxyradical scavenging capacity Trematomus info:eu-repo/semantics/article 2010 ftupmarcheiris https://doi.org/10.1080/02757541003789066 2024-03-21T18:10:09Z Oxidative challenge is an important factor affecting the adaptive strategies of Antarctic fish, but data on antioxidant defences in these organisms remain scarce. In this investigation, individual antioxidants and the total oxyradical scavenging capacity (TOSC) were characterised in three notothenioid species, Trematomus bernacchii, Trematomus hansoni and Trematomus newnesi; seasonal fluctuations were further analysed in T. bernacchii sampled during different periods of the reproductive cycle, ice melting and phytoplanktonic blooms. The overall results revealed only limited differences between the three notothenioids, with greater TOSC values in T. hansoni and T. newnesi. The capacity for decomposing hydrogen peroxide via catalase was not particularly enhanced in these fish, in contrast to the prominent role of the enzyme in Antarctic invertebrates. An alternative antioxidant strategy, based on the efficiency of low molecular mass scavengers was suggested, especially for T. bernacchii which had higher levels of glutathione and glutathione reductase; the diet composition of the investigated species might explain the differences in tissue antioxidants. Oxidative stress responses revealed almost constant values between November and January in T. bernacchii, a quite unusual and unexpected result considering the marked changes occurring in several biological and environmental factors. In this respect, the antioxidant efficiency of T. bernacchii would counteract the naturally elevated environmental prooxidant conditions and the associated potential increase in oxidative challenge, i.e. spawning period, sea-ice melting, phytoplanktonic development and the seasonal increase in cadmium bioavailability at Terra Nova Bay. Article in Journal/Newspaper Antarc* Antarctic Ross Sea Sea ice Università Politecnica delle Marche: IRIS Antarctic Ross Sea Terra Nova Bay Chemistry and Ecology 26 4 305 314 |
institution |
Open Polar |
collection |
Università Politecnica delle Marche: IRIS |
op_collection_id |
ftupmarcheiris |
language |
English |
topic |
Adaptation Antioxidants Oxidative stress Seasonal fluctuations Total oxyradical scavenging capacity Trematomus |
spellingShingle |
Adaptation Antioxidants Oxidative stress Seasonal fluctuations Total oxyradical scavenging capacity Trematomus BENEDETTI, MAURA REGOLI, Francesco Marco, Nigro Characterisation of antioxidant defences in three Antarctic notothenioid species from Terra Nova Bay (Ross Sea). |
topic_facet |
Adaptation Antioxidants Oxidative stress Seasonal fluctuations Total oxyradical scavenging capacity Trematomus |
description |
Oxidative challenge is an important factor affecting the adaptive strategies of Antarctic fish, but data on antioxidant defences in these organisms remain scarce. In this investigation, individual antioxidants and the total oxyradical scavenging capacity (TOSC) were characterised in three notothenioid species, Trematomus bernacchii, Trematomus hansoni and Trematomus newnesi; seasonal fluctuations were further analysed in T. bernacchii sampled during different periods of the reproductive cycle, ice melting and phytoplanktonic blooms. The overall results revealed only limited differences between the three notothenioids, with greater TOSC values in T. hansoni and T. newnesi. The capacity for decomposing hydrogen peroxide via catalase was not particularly enhanced in these fish, in contrast to the prominent role of the enzyme in Antarctic invertebrates. An alternative antioxidant strategy, based on the efficiency of low molecular mass scavengers was suggested, especially for T. bernacchii which had higher levels of glutathione and glutathione reductase; the diet composition of the investigated species might explain the differences in tissue antioxidants. Oxidative stress responses revealed almost constant values between November and January in T. bernacchii, a quite unusual and unexpected result considering the marked changes occurring in several biological and environmental factors. In this respect, the antioxidant efficiency of T. bernacchii would counteract the naturally elevated environmental prooxidant conditions and the associated potential increase in oxidative challenge, i.e. spawning period, sea-ice melting, phytoplanktonic development and the seasonal increase in cadmium bioavailability at Terra Nova Bay. |
author2 |
Benedetti, Maura Marco, Nigro Regoli, Francesco |
format |
Article in Journal/Newspaper |
author |
BENEDETTI, MAURA REGOLI, Francesco Marco, Nigro |
author_facet |
BENEDETTI, MAURA REGOLI, Francesco Marco, Nigro |
author_sort |
BENEDETTI, MAURA |
title |
Characterisation of antioxidant defences in three Antarctic notothenioid species from Terra Nova Bay (Ross Sea). |
title_short |
Characterisation of antioxidant defences in three Antarctic notothenioid species from Terra Nova Bay (Ross Sea). |
title_full |
Characterisation of antioxidant defences in three Antarctic notothenioid species from Terra Nova Bay (Ross Sea). |
title_fullStr |
Characterisation of antioxidant defences in three Antarctic notothenioid species from Terra Nova Bay (Ross Sea). |
title_full_unstemmed |
Characterisation of antioxidant defences in three Antarctic notothenioid species from Terra Nova Bay (Ross Sea). |
title_sort |
characterisation of antioxidant defences in three antarctic notothenioid species from terra nova bay (ross sea). |
publisher |
Editore Gordon and Breach Science Publishers Taylor & Francis Limited:Rankine Road, Basingstoke RG24 8PR United Kingdom:011 44 1256 813035, EMAIL: madeline.sims@tandf.co.uk, info@tandf.co.uk, INTERNET: http://www.tandf.co.uk, Fax: 011 44 1256 330245 |
publishDate |
2010 |
url |
http://hdl.handle.net/11566/28771 https://doi.org/10.1080/02757541003789066 |
geographic |
Antarctic Ross Sea Terra Nova Bay |
geographic_facet |
Antarctic Ross Sea Terra Nova Bay |
genre |
Antarc* Antarctic Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Ross Sea Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000280264900006 volume:26 issue:4 firstpage:305 lastpage:314 numberofpages:10 journal:CHEMISTRY IN ECOLOGY http://hdl.handle.net/11566/28771 doi:10.1080/02757541003789066 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-77954843902 |
op_doi |
https://doi.org/10.1080/02757541003789066 |
container_title |
Chemistry and Ecology |
container_volume |
26 |
container_issue |
4 |
container_start_page |
305 |
op_container_end_page |
314 |
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1796319180237045760 |