Research article - Peer-reviewed, 2007
Silver (Ag+) reduces denitrification and induces enrichment of novel nirK genotypes in soil
Throback IN, Johansson M, Rosenquist M, Pell M, Hansson M, Hallin SAbstract
The use of silver ions in industry to prevent microbial growth is increasing and silver is a new and an overlooked heavy-metal contaminant in sewage sludge-amended soil. The denitrifying community was the model used to assess the dose-dependent effects of silver ions on microorganisms overtime in soil microcosms. Silver caused a sigmoid dose-dependent reduction in denitrification activity, and no recovery was observed during 90 days. Dentrifiers with nirK, which encodes the copper nitrite reductase, were targeted to estimate abundance and community composition for some of the concentrations. The nirK copy number decreased by the highest addition (100 mg Ag kg(-1) soil), but the nirK diversity increased. Treatment-specific sequences not clustering with any deposited nirK sequences were found, indicating that silver induces enrichment of novel nirK denitrifiersPublished in
FEMS Microbiology Letters2007, volume: 270, number: 2, pages: 189-194
Publisher: BLACKWELL PUBLISHING
Authors' information
Throbäck, Ingela
Swedish University of Agricultural Sciences, Department of Microbiology
Swedish University of Agricultural Sciences, Department of Microbiology
Swedish University of Agricultural Sciences, Department of Microbiology
Hallin, Sara Gates (Hallin, Sara)
Swedish University of Agricultural Sciences, Department of Microbiology
Hansson, M
Johansson, M
UKÄ Subject classification
Agricultural Science
Environmental Sciences related to Agriculture and Land-use
Publication Identifiers
DOI: https://doi.org/10.1111/j.1574-6968.2007.00632.x
URI (permanent link to this page)
https://res.slu.se/id/publ/14259