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Titolo:
Influence of TNT transformation on microbial community structure in four different lake microcosms
Autore:
Wikstrom, P; Andersson, AC; Nygren, Y; Sjostrom, J; Forsman, M;
Indirizzi:
Def Res Estab, Dept Microbiol, SE-90182 Umea, Sweden Def Res Estab Umea Sweden SE-90182 Dept Microbiol, SE-90182 Umea, Sweden Def Res Estab, Dept Chem, Umea, Sweden Def Res Estab Umea SwedenDef Res Estab, Dept Chem, Umea, Sweden Def Res Estab, Dept NBC Def, Umea, Sweden Def Res Estab Umea SwedenDef Res Estab, Dept NBC Def, Umea, Sweden
Titolo Testata:
JOURNAL OF APPLIED MICROBIOLOGY
fascicolo: 2, volume: 89, anno: 2000,
pagine: 302 - 308
SICI:
1364-5072(200008)89:2<302:IOTTOM>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
AMPLIFIED POLYMORPHIC DNA; CONTAMINATED SOIL; 2,4,6-TRINITROTOLUENE; METABOLITES; BINDING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Forsman, M Def Res Estab, Dept Microbiol, SE-90182 Umea, Sweden Def Res Estab Umea Sweden SE-90182 iol, SE-90182 Umea, Sweden
Citazione:
P. Wikstrom et al., "Influence of TNT transformation on microbial community structure in four different lake microcosms", J APPL MICR, 89(2), 2000, pp. 302-308

Abstract

After World War II, large amounts of obsolete ammunition were dumped in various lakes in Sweden. Trinitrotoluene, TNT, was one of the main componentsof the dumped explosives. In this study, four different lake microcosms originating from lakes where relatively large amounts of ammunition were dumped were used to mimic the effect of TNT release on the natural microbial community. Increased microbial growth was found in lake microcosms amended with TNT. However, negligible mineralization of TNT was detected, suggesting that TNT was not utilized as a carbon source, but as a nitrogen source. Random amplified polymorphic DNA (RAPD) analysis indicated that the TNT induced no significant differences in microbial community composition and therefore, no major changes in natural selection, despite the increased microbial growth in the presence of the compound. More than 95% of the added TNT bound irreversibly to the sediments, possibly as a result of microbial transformation to reactive metabolites that subsequently bound covalently to components of the sediment. The results, taken together, suggest that no permanent change in the microbial ecology occurred as a result of the TNT amendment. This was probably due partly to the transient exposure of the microbial communities to the TNT before it became irreversibly bound to the sediment, and partly to the fact that TNT was not a primary growth substrate that strongly affects natural selection.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/07/20 alle ore 23:35:27