Hydropower reservoirs: cytotoxic and genotoxic assessment using the Allium cepa root model.
Environ Sci Pollut Res Int
; 24(9): 8759-8768, 2017 Mar.
Article
em En
| MEDLINE
| ID: mdl-28213707
ABSTRACT
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.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Centrais Elétricas
/
Poluentes Químicos da Água
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Resíduos de Praguicidas
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Aberrações Cromossômicas
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Metais Pesados
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Cebolas
País/Região como assunto:
America do sul
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Brasil
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article