Bacterial communities and enzyme activities of PAHs polluted soils

Chemosphere
V AndreoniL Gianfreda

Abstract

Three soils (i.e. a Belgian soil, B-BT, a German soil, G, and an Italian agricultural soil, I-BT) with different properties and hydrocarbon-pollution history with regard to their potential to degrade phenanthrene were investigated. A chemical and microbiological evaluation of soils was done using measurements of routine chemical properties, bacterial counts and several enzyme activities. The three soils showed different levels of polycyclic aromatic hydrocarbons (PAHs), being their contamination strictly associated to their pollution history. High values of enzyme activities and culturable heterotrophic bacteria were detected in the soil with no or negligible presence of organic pollutants. Genetic diversity of soil samples and enrichment cultures was measured as bands on denaturing gradient gel electrophoresis (DGGE) of amplified 16S rDNA sequences from the soil and enrichment community DNAs. When analysed by Shannon index (H'), the highest genetic biodiversity (H'=2.87) was found in the Belgian soil B-BT with a medium-term exposition to PAHs and the poorest biodiversity (H'=0.85) in the German soil with a long-term exposition to alkanes and PAHs and where absence, or lower levels of enzyme activities were measured. For the It...Continue Reading

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Citations

Mar 8, 2005·Applied Microbiology and Biotechnology·Fabio RussoLiliana Gianfreda
Jun 2, 2007·Applied Microbiology and Biotechnology·Vincenza Andreoni, Liliana Gianfreda
Apr 12, 2007·Journal of Industrial Microbiology & Biotechnology·M Isabel SarróFelipe Montero
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