Affiliation:
1. Instituto de Recursos Naturales y Agrobiologia, C.S.I.C., Apartado 1052, 41080 Seville, Spain
Abstract
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 μg/ml. Humic acid at 10 μg/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.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
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