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izvor podataka: crosbi

Taxonomic and functional diversity of atrazine-degrading bacterial communities enriched from agrochemical factory soil (CROSBI ID 163616)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Udiković-Kolić, Nikolina ; Hršak, Dubravka ; Devers, Marion ; Klepac-Ceraj, Vanja ; Petrić, Ines ; Martin-Laurent, Fabrice Taxonomic and functional diversity of atrazine-degrading bacterial communities enriched from agrochemical factory soil // Journal of applied microbiology, 109 (2010), 1; 355-367. doi: 10.1111/j.1365-2672.2010.04700.x

Podaci o odgovornosti

Udiković-Kolić, Nikolina ; Hršak, Dubravka ; Devers, Marion ; Klepac-Ceraj, Vanja ; Petrić, Ines ; Martin-Laurent, Fabrice

engleski

Taxonomic and functional diversity of atrazine-degrading bacterial communities enriched from agrochemical factory soil

Aims: To characterize atrazine-degrading potential of bacterial communities enriched from agrochemical factory soil by analyzing diversity and organization of catabolic genes. Methods and Results: The bacterial communities enriched from three different sites of varying atrazine contamination mineralized 65-80% of 14C ring-labeled atrazine. The presence of trzN-atzBC-trzD, trzN-atzABC-trzD and trzN-atzABCDEF-trzD gene combinations was determined by PCR. In all enriched communities, trzN-atzBC genes were located on a 165-kb plasmid, while atzBC or atzC genes were located on separate plasmids. Quantitative PCR revealed that catabolic genes were present in up to 4% of the community. Restriction analysis of 16S rDNA clone libraries of the three enrichments revealed marked differences in microbial community structure and diversity. Sequencing of selected clones identified members belonging to Proteobacteria (α-, β- and γ-subclasses), the Actinobacteria, Bacteroidetes and TM7 division. Several 16S rRNA gene sequences were closely related to atrazine-degrading community members previously isolated from the same contaminated site. Conclusions: The enriched communities represent a complex and diverse bacterial associations displaying heterogeneity of catabolic genes and their functional redundancies at the first steps of the upper and lower atrazine-catabolic pathway. The presence of catabolic genes in small proportion suggests that only a subset of the community has the capacity to catabolize atrazine. Significance and Impact of the Study: This study provides insights into the genetic specificity and the repertoire of catabolic genes within bacterial communities originating from soils exposed to long-term contamination by s-triazine compounds.

atrazine ; biodegradation ; bacterial community ; diversity ; atz genes ; trz genes

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Podaci o izdanju

109 (1)

2010.

355-367

objavljeno

1364-5072

1365-2672

10.1111/j.1365-2672.2010.04700.x

Povezanost rada

Biotehnologija

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