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Environ Sci Pollut Res Int ; 24(9): 8759-8768, 2017 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-28213707

RESUMEN

Hydropower offers a reliable source of electricity in several countries, and Brazil supplies its energy needs almost entirely through hydropower plants. Nevertheless, hydropower plants comprise large buildings and water reservoirs and dams, resulting in huge ecological disruptions. Here, we analyzed the impact of four hydropower reservoirs construction in metals and pesticides incidence and the cytotoxic and genotoxic potential of sediment elutriate of rivers from southern Brazil. Our analyses have evidenced the elevated incidence of different metals (lead, iron, cadmium, and chrome) and pesticides (methyl parathion, atrazine, and 2,4-dichlorophenoxyacetic acid). We showed that Allium cepa exposed to sediment elutriates did not change the seed germination rate and mitotic index. However, roots from Allium cepa exposed to reservoirs sediment elutriates showed increased occurrence of chromosomal aberrations and nuclear abnormalities. Therefore, the results obtained in our study indicate that sediment from reservoirs present elevated concentration of metals and pesticides and a significant genotoxic potential. Taken together, our data support that hydropower reservoirs represent an environmental scenario that could impact surrounding wildlife and population.


Asunto(s)
Aberraciones Cromosómicas/inducido químicamente , Metales Pesados/toxicidad , Cebollas/efectos de los fármacos , Residuos de Plaguicidas/toxicidad , Centrales Eléctricas , Contaminantes Químicos del Agua/toxicidad , Brasil , Sedimentos Geológicos/química , Metales Pesados/análisis , Micronúcleos con Defecto Cromosómico/inducido químicamente , Pruebas de Micronúcleos , Índice Mitótico , Cebollas/genética , Residuos de Plaguicidas/análisis , Raíces de Plantas/efectos de los fármacos , Raíces de Plantas/genética , Ríos/química , Contaminantes Químicos del Agua/análisis
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