Your browser doesn't support javascript.
loading
Biological monitoring and B chromosome frequency in Bagre (Rhamdia quelen) in southeast Brazil.
de Campos Júnior, Edimar Olegário; Pereira, Boscolli Barbosa; Morelli, Sandra; Pavanin, Erich Vectore; Pavanin, Luiz Alfredo.
Afiliação
  • de Campos Júnior EO; Federal University of Uberlândia-UFU, Department of Genetics and Biochemistry, Umuarama Campus, CEP 38400-902 Uberlândia, MG, Brazil. Electronic address: edimarcampos@yahoo.com.
  • Pereira BB; Federal University of Uberlândia-UFU, Department of Genetics and Biochemistry, Umuarama Campus, CEP 38400-902 Uberlândia, MG, Brazil.
  • Morelli S; Federal University of Uberlândia, Institute of Biology, Department of Genetics and Biochemistry, Campus Umuarama, CEP 38400-902 Uberlândia, MG, Brazil.
  • Pavanin EV; Federal University of Uberlândia, Institute of Geography, Department of Geography, Campus Santa Mônica, CEP 38405-000 Uberlândia, MG, Brazil.
  • Pavanin LA; Federal University of São Paulo-USP, Institute of Chemistry Department of Chemistry, Campus Santa Mônica, CEP 38405-000 Uberlândia, MG, Brazil.
Environ Toxicol Pharmacol ; 38(2): 510-7, 2014 Sep.
Article em En | MEDLINE | ID: mdl-25168153
The genus Rhamdia presents B chromosomes which appear to be present in most species of the genus and thus represent an important characteristic in the evolutionary process. Furthermore, variations in environmental conditions can induce the presence of B chromosomes generated by alterations in the cell cycle, due to the interference from pollutants. The present study aimed to evaluate the cytogenetic aspects of individuals of a population of Rhamdia quelen collected in three areas with differing standards of water quality in the River Uberabinha, a region of the County of Uberlandia, Minas Gerais, Brazil. The Piscine Micronucleus Test results indicate significant genotoxic and cytotoxic potential at the sampling Sites. The chromosome count yielded the modal number 2n=58 with variance between zero and seven B chromosomes. The highest frequency of B chromosomes and the presence of karyotypes with seven supernumerary chromosomes occurred at Site 3, referring, thus, to the location of the highest genotoxic potential. There was a positive correlation between the presence of B chromosomes and the reduction in environmental quality. Therefore, the process of bioaccumulation of heavy metals in aquatic environments may be crucial to determine the presence of B chromosomes.
Assuntos
Palavras-chave
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Peixes-Gato / Cromossomos / Metais Pesados / Cariótipo Anormal Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Environ Toxicol Pharmacol Ano de publicação: 2014 Tipo de documento: Article País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Peixes-Gato / Cromossomos / Metais Pesados / Cariótipo Anormal Limite: Animals País/Região como assunto: America do sul / Brasil Idioma: En Revista: Environ Toxicol Pharmacol Ano de publicação: 2014 Tipo de documento: Article País de publicação: Holanda