INVESTIGADORES
LUQUET Carlos Marcelo
artículos
Título:
Oxidativestress and antioxidant defenses in two green microalgae
Autor/es:
SEBASTIAN E. SABATINI ; ANGELA B.JUAREZ; MARIA R. EPPIS; LAURA BIANCHI; CARLOS M. LUQUET; MARıA DEL CARMEN RıOS DE MOLINA
Revista:
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Editorial:
Elsevier
Referencias:
Lugar: San Diego California; Año: 2009 vol. 72 p. 1200 - 1206
ISSN:
0147-6513
Resumen:
The aimofthisworkwastoassesstheeffectsof1weekcopperexposure(6.2,108,210and414 mM) on Scenedesmusvacuolatus and Chlorellakessleri. Thestrainsshoweddifferentsusceptibilitytocopper. CoppercontentwasdeterminedinbothstrainsbytotalX-rayreflectionfluorescenceanalysis(TXRF).In S. vacuolatus, theincreaseofmediumcopperconcentrationinducedanaugmentationofproteinand MDAcontent,andasignificantdecreaseinthechlorophyll a/chlorophyll b ratio. S. vacuolatus showeda significantincreaseofcatalaseactivityin210and414 mM ofcopper,andasignificantincrementofSOD activity andGSHcontentonlyin414 mM ofcopper.Onthecontrary, C. kessleri did notshowsignificant differences intheseparametersbetween6.2and108 mM ofcopper.Increasedcopperinthe environment evokesoxidativestressandanincreaseintheantioxidantdefensesof S. vacuolatus. & 2009ElsevierInc.Allrightsreserved. mM) on Scenedesmusvacuolatus and Chlorellakessleri. Thestrainsshoweddifferentsusceptibilitytocopper. CoppercontentwasdeterminedinbothstrainsbytotalX-rayreflectionfluorescenceanalysis(TXRF).In S. vacuolatus, theincreaseofmediumcopperconcentrationinducedanaugmentationofproteinand MDAcontent,andasignificantdecreaseinthechlorophyll a/chlorophyll b ratio. S. vacuolatus showeda significantincreaseofcatalaseactivityin210and414 mM ofcopper,andasignificantincrementofSOD activity andGSHcontentonlyin414 mM ofcopper.Onthecontrary, C. kessleri did notshowsignificant differences intheseparametersbetween6.2and108 mM ofcopper.Increasedcopperinthe environment evokesoxidativestressandanincreaseintheantioxidantdefensesof S. vacuolatus. & 2009ElsevierInc.Allrightsreserved.
