Cytotoxicity and genotoxicity of Guaribas river water (Piauí, Brazil), influenced by anthropogenic action.

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ID: 109729
2017
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Abstract
In general, tropical rivers have a great impact on human activities. Bioaccumulation of toxins is a worldwide problem nowadays and has been, historically, overlooked by the supervisory authorities. This study evaluated cytogenotoxic effects of Guaribas river (a Brazilian river) water during dry and rainy seasons of 2014 by using the Allium cepa test system. The toxicogenetic variables, including root growth, mitotic index, and chromosomal aberrations, were analyzed in meristematic cells of A. cepa exposed to water samples taken from the up-, within, and downstream of the city Picos (state: Piauí). The physical-chemical parameters were also analyzed to explain water quality and possible anthropogenic action. Additionally, the presence of heavy metals was also analyzed to explain water quality and possible damaging effects on eukaryotic cells. The results suggest that the river water exerted cytotoxic, mutagenic, and genotoxic effects, regardless of the seasons. In addition, Guaribas river presented physico-chemical values outside the Brazilian laws, which can be a characteristic of human pollution (domestic sewage, industrial, and local agriculture). The genetic damage was positively correlated with higher levels of heavy metals. The pollution of the Guaribas river water may link to the chemical contamination, including the action of heavy metals and their impacts on genetic instability in the aquatic ecosystem. In conclusion, necessary steps should be taken into account for further toxicogenetic studies of the Guaribas river water, as it has an influence in human health of the same region of Brazil.
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de-castro-e-sousa2017cytotoxicityenvironmental Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors de Castro E Sousa, João Marcelo;Peron, Ana Paula;da Silva E Sousa, Louridânya;de Moura Holanda, Mércia;de Macedo Vieira Lima, Ataíde;de Oliveira, Vitor Alves;da Silva, Felipe Cavalcanti Carneiro;de Morais Lima, Leonardo Henrique Guedes;Matos, Leomá Albuquerque;de Moura Dantas, Sandra Maria Mendes;de Aguiar, Raí Pablo Sousa;Islam, Muhammad Torequl;de Carvalho Melo-Cavalcante, Ana Amélia;Bonecker, Cláudia Costa;Junior, Horácio Ferreira Júlio;
Journal Environmental monitoring and assessment
Year 2017
DOI
10.1007/s10661-017-6015-2
URL
Keywords
genetic damage aquatic toxicology environmental mutagenesis

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