IBIMOL 23987
INSTITUTO DE BIOQUIMICA Y MEDICINA MOLECULAR PROFESOR ALBERTO BOVERIS
Unidad Ejecutora - UE
artículos
Título:
The effect of seasonality on oxidative metabolism in Loxechinus albus
Autor/es:
MALANGA G., PEREZ A., CALVO J. Y PUNTARULO S.
Revista:
MARINE BIOLOGY
Editorial:
SPRINGER
Referencias:
Año: 2009 vol. 156 p. 763 - 770
ISSN:
0025-3162
Resumen:
The objective of the present study was to investigate seasonal variations in the oxidative metabolism of the sea urchin Loxechinus albus gonads. The spawning period for this species has been reported to be extended from September to November. Lipid radical content showed non-significant changes upon the seasons. Ascorbyl radical content and the concentration of a-tocopherol were lower in samples collected in spring and summer as compared to winter. Ascorbate content decreased in fall as compared to winter. For the lipophilic compartment, the lipid radical content/na-tocopherol content ratio is an indicator of oxidative stress. During spawning this index increased significantly as compared to the values during winter. The ascorbyl content/ascorbate content ratio is an indicator of oxidative stress for the hydrophilic milieu. A significant decrease by 66% was determined in summer as compared to winter values. The data reported here suggest a different profile of response against oxidative stress at the lipophilic and hydrophilic milieu in L. albus gonads.
