Antioxidant responses in <i>Scytosiphon lomentaria</i> (Phaeophyceae) inhabiting copper-enriched coastal environments

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dc.contributor.authorContreras, L
dc.contributor.authorMoenne, A
dc.contributor.authorCorrea, JA
dc.date.accessioned2025-01-21T01:06:37Z
dc.date.available2025-01-21T01:06:37Z
dc.date.issued2005
dc.description.abstractScytosiphon lomentaria (Lingb.) Link. (Phaeophyceae) is one of the two dominant seaweeds in a coastal area of northern Chile affected by copper mine wastes, where the concentration of copper in water and algal tissues remains higher than in nonimpacted sites. Copper-loaded plants develop oxidative stress, as demonstrated by the increased levels of reactive oxygen species and lipoperoxides. This stress was associated with 1) an enhanced activity of the antioxidant enzymes catalase, glutathione peroxidase, ascorbate peroxidase, monodehydroascorbate reductase, and dehydroascorbate reductase and 2) an inhibition of the glutathione reductase activity. Furthermore, stressed plants showed a decrease in glutathione and phenolic compounds levels and an increase in total ascorbate. Reciprocal transplants revealed that plants rapidly adjusted their antioxidant system in response to the conditions of the receiving site. In individuals transplanted from the copper-enriched environment to the control site, normal levels of lipoperoxides and antioxidant compounds were restored in 48 h and antioxidant enzymes recovered their basal activities in 96 h. Individuals transplanted from the control site to the copper-enriched area adjusted their antioxidant compounds and antioxidant enzymes within 48 h and 96 h, respectively, and reached the functional status of the local plants. We conclude that S. lomentaria inhabiting the copper-enriched area buffered oxidative stress by a simultaneous involvement of antioxidant enzymes and water-soluble antioxidant compounds. These antioxidant responses were rapid and reversible, suggesting that copper resistance in S. lomentaria is a constitutive trait and that copper enrichment of the area did not result in a locally adapted copper-tolerant ecotype.
dc.fuente.origenWOS
dc.identifier.doi10.1111/j.1529-8817.2005.00151.x
dc.identifier.eissn1529-8817
dc.identifier.issn0022-3646
dc.identifier.urihttps://doi.org/10.1111/j.1529-8817.2005.00151.x
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96192
dc.identifier.wosidWOS:000233829500014
dc.issue.numero6
dc.language.isoen
dc.pagina.final1195
dc.pagina.inicio1184
dc.revistaJournal of phycology
dc.rightsacceso restringido
dc.subjectadaptation
dc.subjectantioxidant metabolism
dc.subjectcopper stress and resistance
dc.subjectphysiological plasticity
dc.subjectScytosiphon lomentaria
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.ods14 Life Below Water
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.subject.odspa14 Vida submarina
dc.titleAntioxidant responses in <i>Scytosiphon lomentaria</i> (Phaeophyceae) inhabiting copper-enriched coastal environments
dc.typeartículo
dc.volumen41
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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