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Type: Journal article
Title: Resistance of microbial populations in DDT-contaminated and uncontaminated soils
Author: Kantachote, D.
Naidu, Ravendra
Singleton, Ian
McClure, Nicholas Charles
Harch, Bronwyn D.
Citation: Applied Soil Ecology, 2001; 16(1):85-90
Publisher: Elsevier Science BV
Issue Date: 2001
ISSN: 0929-1393
School/Discipline: School of Earth and Environmental Sciences : Soil and Land Systems
Statement of
D Kantachote, R Naidu, I Singleton, N McClure and B.D Harch
Abstract: One DDT-contaminated soil and two uncontaminated soils were used to enumerate DDT-resistant microbes (bacteria, actinomycetes and fungi) by using soil dilution agar plates in media either with 150 μg DDT ml−1 or without DDT at different temperatures (25, 37 and 55°C). Microbial populations in this study were significantly (p<0.001) affected by DDT in the growth medium. However, the numbers of microbes in long-term contaminated and uncontaminated soils were similar, presumably indicating that DDT-resistant microbes had developed over a long time exposure. The tolerance of isolated soil microbes to DDT varied in the order fungi>actinomycetes>bacteria. Bacteria from contaminated soil were more resistant to DDT than bacteria from uncontaminated soils. Microbes isolated at different temperatures also demonstrated varying degrees of DDT resistance. For example, bacteria and actinomycetes isolated at all incubation temperatures were sensitive to DDT. Conversely fungi isolated at all temperatures were unaffected by DDT.
Keywords: DDT; microorganisms; soil contamination
Rights: Copyright © 2001 Elsevier Science B.V. All rights reserved.
DOI: 10.1016/S0929-1393(00)00058-5
Appears in Collections:Soil and Land Systems publications

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