Dissertação
Efeito do óleo essencial de lippia alba nos parâmetros oxidativos do jundiá (Rhamdia quelen) exposto a diferentes concentrações de oxigênio
Fecha
2009-09-01Registro en:
AZAMBUJA, Cati Reckelberg. Effect of the essential oil of lippia alba on oxidative parameters of silver catfish (Rhamdia quelen) exposed a differents oxygen levels. 2009. 54 f. Dissertação (Mestrado em Farmácia) - Universidade Federal de Santa Maria, Santa Maria, 2009.
Autor
Azambuja, Cati Reckelberg
Institución
Resumen
Juvenile silver fish (Rhamdia quelen) were exposed to the essential oil of
Lippia alba (L. alba) and transported in plastic bags for different periods (5, 6 and 7
h) yielding final different oxygen levels. The biomarkers of oxidative stress,
lipoperoxidation (LPO), catalase (CAT), superoxide dismutase (SOD), and
glutathione-S-transferase (GST) were measured in the liver, gills and brain of the
fish. The juveniles were assigned to 6 different treatment groups according to the
presence or not of the essential oil of L. alba in water (10 μL/L) and the length of
transportation, which determined the final concentration of dissolved oxygen inside
the bags: Five hours: hyperoxia (13.25 ± 0.35 mg/L O2); hyperoxia with L. alba (11.27
± 0.22 mg/L O2); Six hours: normoxia (7.35 ± 0.35 mg/L O2); normoxia with L. alba
(7.29 ± 0.40 mg/L O2); Seven hours: hypoxia (2.29 ± 0.36 mg/L O2); hypoxia with L.
alba (3.82 ± 0.7 mg/L O2). The addition of essential oil of L. alba causes an increase
of LPO in the tissues exposed to hyperoxia and a reduction of GST in the fish kept
under hyperoxia and hypoxia as compared to those under normoxia. In the tissues
there is a reduction of LPO and GST and an increase of SOD in the specimens under
hypoxia and a reduction of GST in those under hyperoxia with the oil. These results
suggest that the presence of the essential oil of L. alba improves the redox state in
the evaluated tissues, both under hyperoxia and under hypoxia.