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Provedor de dados:  Electron. J. Biotechnol.
País:  Chile
Título:  Novel s-triazine-degrading bacteria isolated from agricultural soils of central Chile for herbicide bioremediation
Autores:  Hernández García,Marcela
Morgante,Verónica
Ávila Perez,Marcela
Villalobos Biaggini,Patricio
Miralles Noé,Pola
González Vergara,Myriam
Seeger Pfeiffer,Michael
Data:  2008-12-01
Ano:  2008
Palavras-chave:  Arthrobacter
Biodegradation
Bioremediation
Simazine
Stenotrophomonas
S-triazine
Resumo:  s-Triazine-degrading bacterial strains were isolated from long-term simazine-treated agricultural soils of central Chile. The number of culturable heterotrophic bacteria of these agricultural soils (7 x 10(6) CFU/g of dry soil) was not affected by simazine application on field. The simazine-degrading bacterial strains P51, P52 and C53 were isolated by enrichment in minimal medium using simazine as the sole nitrogen source. Resting cells of strains P51 and P52 degraded >80% of simazine within 48 hrs, whereas strain C53 was able to remove >60% of the herbicide. The atzA and atzD genes of the s-triazine upper and lower catabolic pathways were detected in strains P51 and C53, while only atzD gene was observed in strain P52. To compare the bacterial 16S rRNA gene sequence structure, ARDRA were performed using the restriction enzymes Msp1 and Hha1. ARDRA indicated that strain P52 was a different ribotype than C53 and P51 strains. For further characterization the novel isolates were identified by 16S rRNA gene sequencing. Strains C53 and P51 belong to the genus Stenotrophomonas and the strain P52 belongs to the genus Arthrobacter . s -Triazine-degrading bacterial strains isolated from contaminated soils could be used as biocatalysts for bioremediation of these herbicides.
Tipo:  Journal article
Idioma:  Inglês
Identificador:  http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000500005
Editor:  Pontificia Universidad Católica de Valparaíso
Formato:  text/html
Fonte:  Electronic Journal of Biotechnology v.11 n.5 2008
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