IIMYC   23581
INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Unidad Ejecutora - UE
artículos
Título:
Acute exposure to a commercial formulation of Azoxystrobin alters antioxidant enzymes and elicit damage in the aquatic macrophyte Myriophyllum quitense.
Autor/es:
GARANZINI DANIELA SOLEDAD; MENONE MIRTA LUJAN; MOREYRA LUCÍA SOLEDAD; MEDICI SANDRA
Revista:
Physiology and Molecular Biology of Plants
Editorial:
Springer India
Referencias:
Año: 2019 vol. 94 p. 146 - 161
ISSN:
0971-5894
Resumen:
Azoxystrobin is a strobilurin of growing concern in aquatic environments because it is the most sold fungicide worldwide, however, the information available about its effect on aquatic non-target organisms is scarce. The objective of the present study was to evaluate potential physiologic, biochemical, and genetic effects at environmentally relevant (1- 10 ug/L) and elevated (100- 500 ug/L) concentrations in the aquatic macrophyte Myriophyllum quitense exposed to the commercial formulation AMISTAR®. Following an acute 24- h exposure, there were no effects of AMISTAR® on photosynthetic pigments at any of the concentrations evaluated. Glutathione-S-transferase (GST) activity was significantly elevated at 1 and 10 ug/L AZX. Significant decrease of catalase (CAT) and guaiacol peroxidase (POD) activities in plants exposed to 500 ug/L, and to 100 and 500 ug/L, respectively, and an increase in glycolate oxidase (GOX) activity at 500 ug/L were observed. DNA damage at 100 and 500 ug/L was observed. These data indicate that although environmentally relevant levels of AMISTAR® did not result cytotoxic, this fungicide was genotoxic, affected the physiological process of photorespiration and caused oxidative damage at high concentrations. In this sense, it is necessary to explore sub-lethal responses in non-target organisms because some effects could promote further potential long-term biological consequences in a context of repeated pulses of exposure.