Biotransformation and antioxidant enzymes of Limnoperna fortunei detect

VALESKA CONTARDO-JARA,; LUCAS N.GALANTI; MARÍA V.AME; MAGDALENA MONFERRÁN; DANIEL WUNDERLIN ; CLAUDIA WIEGAND

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY

ELSEVIER

Año: 2009 vol. 72 p. 1871 - 1880

0147-6513

The Golden mussel Limnoperna fortunei was used as a biomonitor of environmental pollution in the Suquía River basin around Córdoba city(Argentina).The sampling sites along the river were chosen according to the irincreasing levels of pollutants (e.g.heavy metals) as well as biological oxygen demand (BOD) and chemica loxygen demand (COD). A water quality index (WQI) was constructed from the interaction of several normalized factors that affect the aquatic environment, such as the mentioned pollutants and physico-chemical characteristics of the sampling sites. Activity changes of biotransformation enzyme glutathione S-transferase (GST) and the antioxidant enzymes glutathioneperoxidase (GPx), glutathionereductase (GR) and catalase (CAT), after exposure to pollutants, served as biomarkers. Membrane bound GST and antioxidant enzymes responded at the most polluted sampling site with in 1 day showing increased activities lasting for 4 days. Further sampling was restricted due to no survival of the animals. Antioxidant enzymes GPx, GR and CAT were sensitive responding to the different pollution scenarios, showing good correlation to the chemical characterization.