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dc.contributor.author
Parada, José  
dc.contributor.author
Rubilar, Olga  
dc.contributor.author
Sousa, D. Z.  
dc.contributor.author
Martínez, M.  
dc.contributor.author
Fernández Baldo, Martín Alejandro  
dc.contributor.author
Tortella, Gonzalo  
dc.date.available
2020-05-20T19:45:32Z  
dc.date.issued
2019-06  
dc.identifier.citation
Parada, José; Rubilar, Olga; Sousa, D. Z.; Martínez, M.; Fernández Baldo, Martín Alejandro; et al.; Short term changes in the abundance of nitrifying microorganisms in a soil-plant system simultaneously exposed to copper nanoparticles and atrazine; Elsevier Science; Science of the Total Environment; 670; 6-2019; 1068-1074  
dc.identifier.issn
0048-9697  
dc.identifier.uri
http://hdl.handle.net/11336/105617  
dc.description.abstract
Copper nanoparticles (NCu) may co-exist with other pollutants in agricultural soils, such as pesticides. However, this has been little evaluated yet. Thus, possible effects of the simultaneous applications of pesticides and NCu on biogeochemical cycles are expected, for example on the nitrogen cycle. Therefore, the aim of this work was to evaluate the effect of simultaneous application of the herbicide atrazine (ATZ) and NCu on the abundance of total bacteria and nitrifying communities: ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB). Moreover, the ATZ dissipation was evaluated. A soil-plant system containing ATZ at field dose (3 mg a.i. kg−1) was mixed with two doses of NCu (0.05% or 0.15% w/w). Changes in the abundance of 16S rRNA and ammonia monooxygenase (amoA) genes of AOA and AOB were evaluated by real-time quantitative PCR (qPCR) at three sampling times (1, 15 and 30 days). The residual ATZ and nitrate production were also measured. The results showed significant differences in microbial composition and abundance over the 30 days of the experiment. Particularly, an initial decrease was observed in total bacterial abundance due to the presence of ATZ and NCu respect to ATZ alone (~60%). The abundance of AOA was also remarkably reduced (~85%), but these communities gradually recovered towards the end of the experiment. Conversely, AOB abundance initially increased (>100%) and remained mainly unaltered in soil exposed to ATZ and NCu 0.15% w/w, where nitrate formation was also constant. Moreover, NCu decreased the ATZ dissipation, which was translated in a 2-fold increase on the ATZ half-life values (T1/2). This study demonstrates that the simultaneous presence of NCu and ATZ may represent a risk for the total bacteria present in soil and sensitive microorganisms such as nitrifying communities, and changes in the dissipation of the pesticide could influence this process.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/restrictedAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
NITRIFYING  
dc.subject
MICROORGANISMS  
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SOIL PLANT  
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COPPER NANOPARTICLES  
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Nano-materiales  
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Nanotecnología  
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INGENIERÍAS Y TECNOLOGÍAS  
dc.title
Short term changes in the abundance of nitrifying microorganisms in a soil-plant system simultaneously exposed to copper nanoparticles and atrazine  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2020-04-23T19:30:19Z  
dc.journal.volume
670  
dc.journal.pagination
1068-1074  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Parada, José. Universidad de La Frontera; Chile  
dc.description.fil
Fil: Rubilar, Olga. Centro de Excelencia en Investigación Biotecnológica Aplicada al Medio Ambiente; Chile. Universidad de La Frontera; Chile  
dc.description.fil
Fil: Sousa, D. Z.. Wageningen University; Países Bajos  
dc.description.fil
Fil: Martínez, M.. Universidad de Concepción; Chile  
dc.description.fil
Fil: Fernández Baldo, Martín Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Química de San Luis. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Instituto de Química de San Luis; Argentina  
dc.description.fil
Fil: Tortella, Gonzalo. Universidad de La Frontera; Chile. Centro de Excelencia en Investigación Biotecnológica Aplicada al Medio Ambiente; Chile  
dc.journal.title
Science of the Total Environment  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0048969719312100  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/j.scitotenv.2019.03.221