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| Hernández García,Marcela; Morgante,Verónica; Ávila Perez,Marcela; Villalobos Biaggini,Patricio; Miralles Noé,Pola; González Vergara,Myriam; Seeger Pfeiffer,Michael. |
| 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... |
| Tipo: Journal article |
Palavras-chave: Arthrobacter; Biodegradation; Bioremediation; Simazine; Stenotrophomonas; S-triazine. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000500005 |
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| Hernández,Marcela; Morgante,Verónica; Flores,Cecilia; Villalobos,Patricio; González,Myriam; Miralles,Pola; Dinamarca,Alejandro; Seeger,Michael. |
| The extensive use of s-triazine herbicides in diverse countries causes environmental and health concern. Simazine and atrazine are s-triazines widely used in agriculture and forestry. Although, natural dissipation of s-triazines in soils by physicochemical processes has been described, the main mechanism for their removal is biological degradation by microorganisms. Bioremediation is a successful strategy for the removal of i-triazines in soil. For bioaugmentation processes, s-triazine-degrading bacteria are required, which isolation from agricultural soils was described in this report. Studies of s-triazine adsorption and leaching in soil are useful to determine the bioavailability of these herbicides. The detection of s-triazine-degrading catabolic... |
| Tipo: Journal article |
Palavras-chave: Í-triazine; Simazine; Biodegradation; Bioremediation; Herbicide. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912008000200004 |
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| Colla,Luciane Maria; Primaz,Andreiza Lazzarotto; Lima,Marieli de; Bertolin,Telma Elita; Costa,Jorge Alberto Vieira. |
| A biorremediação é uma tecnologia que utiliza o metabolismo de microrganismos para eliminação ou redução, a níveis aceitáveis, de poluentes presentes no ambiente. Os herbicidas triazínicos são usados intensivamente no controle de ervas daninhas, principalmente na cultura de milho. Objetivou-se, neste trabalho, isolar fungos filamentosos de solos contaminados com herbicidas triazínicos (atrazine e simazine) e selecionar os microrganismos isolados quanto à capacidade de crescimento em meio adicionado de atrazine. Os microrganismos foram isolados, cultivados em meio Ágar-Batata-Dextrose (BDA) acidificado com ácido tartárico 10%, adicionado de 50 mg.Kg-1 de atrazine e incubados por 5 dias a 25ºC. Foi realizada a medida diária do crescimento fúngico e calculada... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atrazine; Simazine; Isolamento; Fungos filamentosos. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542008000300016 |
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