Genetically Modified Pseudomonas Biosensing Biodegraders to Detect PCB and Chlorobenzoate Bioavailability and Biodegradation in Contaminated Soils

Overview

Journal Bioeng Bugs

Specialties Biomedical Engineering
Biotechnology
Microbiology

Date 2011 Feb 18

PMID 21326926

Citations 3

Authors

Xuemei Liu

Kieran J Germaine

David Ryan

David N Dowling

Affiliations

Soon will be listed here.

Abstract

Whole cell microbial biosensors offer excellent possibilities for assaying the complex nature of the bioavailable and bioaccessible fraction of pollutants in contaminated soils, which currently cannot be easily addressed. This paper describes the application and evaluation of three microbial biosensor strains designed to detect the bioavailability and biodegradation of PCBs (and end-products) in contaminated soils and sediments. Polychlorinated biphenyls (PCBs) are considered to be one of the most wide spread, hazardous and persistent pollutants. Herein we describe that there was a positive correlation between the PCB levels within the samples and the percentage of biosensor cells that were expressing their reporter gene; gfp. Immobilisation of the biosensors in calcium alginate beads allowed easy and accurate detection of the biosensor strains in contaminated soil and sludge samples. The biosensors also showed that PCB degradation activity was occurring at a much greater level in Pea inoculated planted soil compared to inoculated unplanted soil indicating rhizoremediation (the removal of pollutants by plant root associated microbes) shows considerable promise as a solution for removing organic xenobiotics from the environment.

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