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Effect of humic fractions and clay on biodegradation of phenanthrene by a Pseudomonas fluorescens strain isolated from soil.

Authors :
Ortega-Calvo JJ
Saiz-Jimenez C
Source :
Applied and environmental microbiology [Appl Environ Microbiol] 1998 Aug; Vol. 64 (8), pp. 3123-6.
Publication Year :
1998

Abstract

The mineralization of phenanthrene in pure cultures of a Pseudomonas fluorescens strain, isolated from soil, was measured in the presence of soil humic fractions and montmorillonite. Humic acid and clay, either separately or in combination, shortened the acclimation phase. A higher mineralization rate was measured in treatments with humic acid at 100 microg/ml. Humic acid at 10 microg/ml stimulated the transformation only in the presence of 10 g of clay per liter. We suggest that sorption of phenanthrene to these soil components may result in a higher concentration of substrate in the vicinity of the bacterial cells and therefore may increase its bioavailability.

Details

Language :
English
ISSN :
0099-2240
Volume :
64
Issue :
8
Database :
MEDLINE
Journal :
Applied and environmental microbiology
Publication Type :
Academic Journal
Accession number :
9687489
Full Text :
https://doi.org/10.1128/AEM.64.8.3123-3126.1998