Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | EFFECTS OF CO-PRESENCE OF HERBICIDES AND WOOD AMENDMENTS ON STRUCTURE AND FUNCTIONING OF SOIL BACTERIAL COMMUNITIES |
| Abstract | Soil microbial community functioning and structure have been studied on agricultural soils treated with both wood amendments and an herbicide (linuron or terbuthylazine). For this purpose the soil dehydrogenase activity, the number of live bacteria and the phylogenetic structure of the bacterial community by Fluorescence In Situ Hybridization (FISH) were assessed in soil treated with linuron or terbuthyazine and either amended with pine or oak wood or un-amended (sterilized and nonsterilized). Moreover, the ability of specific microbial groups to degrade the herbicides was evaluated in terms of half-lives (t1/2) in the un-amended and amended soils for an incubation period of about 60 days. The overall results showed that the bacterial community had a significant role in herbicide degradation. The herbicides halflives (t1/2) values indicated a slower degradation rate in pine and oak amended soils than in unamended ones. This is attributed to the higher sorption of herbicides by these soils compared to the un-amended ones. Furthermore, these herbicides did not affect the microbial community, presumably because the latter had adapted to its presence. However, the specific activity of the herbicide degrading populations was negatively affected by the amendment owing to a lower bioavailability of the herbicide for microbial degradation. |
| Source | SETAC EUROPE 18TH ANNUAL MEETING, SOCIETY ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY, GöTEBORG (SWEDEN), 31/05/2009 - 04/06/2009 |
| Keywords | Soil microbial community functioning and structurewood amendmentslinuron and terbuthylazine herbicides |
| Year | 2009 |
| Type | Abstract in atti di convegno |
| Authors | GRENNI P., BARRA CARACCIOLO A., RODRUIGUEZ CRUZ M.S., MARIN BENITO J.M., SANCHEZ MARTIN M.J. |
| Text | 119402 2009 Soil microbial community functioning and structure wood amendments linuron and terbuthylazine herbicides EFFECTS OF CO PRESENCE OF HERBICIDES AND WOOD AMENDMENTS ON STRUCTURE AND FUNCTIONING OF SOIL BACTERIAL COMMUNITIES GRENNI P., BARRA CARACCIOLO A., RODRUIGUEZ CRUZ M.S., MARIN BENITO J.M., SANCHEZ MARTIN M.J. IRSA CNR, Instituto de Recursos Naturales y Agrobiologia de Salamanca, CSIC, Dpto. Proceso, SALAMANCA, Spain Protecting ecosystem health facing the challenge of a globally changing environment SETAC EUROPE SETAC EUROPE 18TH ANNUAL MEETING, SOCIETY ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY GoTEBORG SWEDEN 31/05/2009 04/06/2009 Internazionale Contributo Soil microbial community functioning and structure have been studied on agricultural soils treated with both wood amendments and an herbicide linuron or terbuthylazine . For this purpose the soil dehydrogenase activity, the number of live bacteria and the phylogenetic structure of the bacterial community by Fluorescence In Situ Hybridization FISH were assessed in soil treated with linuron or terbuthyazine and either amended with pine or oak wood or un amended sterilized and nonsterilized . Moreover, the ability of specific microbial groups to degrade the herbicides was evaluated in terms of half lives t1/2 in the un amended and amended soils for an incubation period of about 60 days. The overall results showed that the bacterial community had a significant role in herbicide degradation. The herbicides halflives t1/2 values indicated a slower degradation rate in pine and oak amended soils than in unamended ones. This is attributed to the higher sorption of herbicides by these soils compared to the un amended ones. Furthermore, these herbicides did not affect the microbial community, presumably because the latter had adapted to its presence. However, the specific activity of the herbicide degrading populations was negatively affected by the amendment owing to a lower bioavailability of the herbicide for microbial degradation. Abstract pubblicato SETAC_Europe_AM2009_Abstract_Book_Grenni.pdf Abstract in atti di convegno paola.grenni GRENNI PAOLA anna.barracaracciolo BARRA CARACCIOLO ANNA TA.P04.005.007 Strumenti di mitigazione dello stress quali quantitativo per i sistemi idrici |