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Abstract:

Agriculture is facing a major challenge nowadays: to increase crop production for food and energy while preserving ecosystem functioning and soil quality. Argentine Pampas is one of the main world producers of crops and one of the main adopters of conservation agriculture. Changes in soil chemical and physical properties of Pampas soils due to different tillage systems have been deeply studied. Still, not much evidence has been reported on the effects of agricultural practices on Pampas soil microbiomes. The aim of our study was to investigate the effects of agricultural land use on community structure, composition and metabolic profiles on soil microbiomes of Argentine Pampas. We also compared the effects associated to conventional practices with the effects of no-tillage systems. Our results confirmed the impact on microbiome structure and composition due to agricultural practices. The phyla Verrucomicrobia, Plactomycetes, Actinobacteria, and Chloroflexi were more abundant in non cultivated soils while Gemmatimonadetes, Nitrospirae and WS3 were more abundant in cultivated soils. Effects on metabolic metagenomic profiles were also observed. The relative abundance of genes assigned to transcription, protein modification, nucleotide transport and metabolism, wall and membrane biogenesis and intracellular trafficking and secretion were higher in cultivated fertilized soils than in non cultivated soils. We also observed significant differences in microbiome structure and taxonomic composition between soils under conventional and notillage systems. Overall, our results suggest that agronomical land use and the type of tillage system have induced microbiomes to shift their life-history strategies. Microbiomes of cultivated fertilized soils (i.e. higher nutrient amendment) presented tendencies to copiotrophy while microbiomes of non cultivated homogenous soils appeared to have a more oligotrophic life-style. Additionally, we propose that conventional tillage systems may promote copiotrophy more than notillage systems by decreasing soil organic matter stability and therefore increasing nutrient availability. © 2014 Carbonetto et al.

Registro:

Documento: Artículo
Título:Structure, composition and metagenomic profile of soil microbiomes associated to agricultural land use and tillage systems in Argentine Pampas
Autor:Carbonetto, B.; Rascovan, N.; Álvarez, R.; Mentaberry, A.; Vázquez, M.P.
Filiación:Instituto de Agrobiotecnología de Rosario (INDEAR), Predio CCT Rosario, Santa Fe, Argentina
Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina
Departamento de Fisiología y Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:Actinobacteria; agricultural land; Argentina; article; bacterial gene; bacterium; Chloroflexi; community structure; conservation tillage; controlled study; Gemmatimonadetes; metagenomics; Nitrospirae; no tillage; nonhuman; pampas; Planctomycetes; population abundance; soil microflora; species composition; tillage; Verrucomicrobia; agriculture; chemistry; classification; crop; ecosystem; genetics; high throughput sequencing; human; metagenomics; microbiology; microflora; procedures; soil; herbicide; soil; Agriculture; Argentina; Bacteria; Crops, Agricultural; Ecosystem; Herbicides; High-Throughput Nucleotide Sequencing; Humans; Metagenomics; Microbiota; Soil; Soil Microbiology
Año:2014
Volumen:9
Número:6
DOI: http://dx.doi.org/10.1371/journal.pone.0099949
Título revista:PLoS ONE
Título revista abreviado:PLoS ONE
ISSN:19326203
CODEN:POLNC
CAS:Herbicides; Soil
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19326203_v9_n6_p_Carbonetto

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Citas:

---------- APA ----------
Carbonetto, B., Rascovan, N., Álvarez, R., Mentaberry, A. & Vázquez, M.P. (2014) . Structure, composition and metagenomic profile of soil microbiomes associated to agricultural land use and tillage systems in Argentine Pampas. PLoS ONE, 9(6).
http://dx.doi.org/10.1371/journal.pone.0099949
---------- CHICAGO ----------
Carbonetto, B., Rascovan, N., Álvarez, R., Mentaberry, A., Vázquez, M.P. "Structure, composition and metagenomic profile of soil microbiomes associated to agricultural land use and tillage systems in Argentine Pampas" . PLoS ONE 9, no. 6 (2014).
http://dx.doi.org/10.1371/journal.pone.0099949
---------- MLA ----------
Carbonetto, B., Rascovan, N., Álvarez, R., Mentaberry, A., Vázquez, M.P. "Structure, composition and metagenomic profile of soil microbiomes associated to agricultural land use and tillage systems in Argentine Pampas" . PLoS ONE, vol. 9, no. 6, 2014.
http://dx.doi.org/10.1371/journal.pone.0099949
---------- VANCOUVER ----------
Carbonetto, B., Rascovan, N., Álvarez, R., Mentaberry, A., Vázquez, M.P. Structure, composition and metagenomic profile of soil microbiomes associated to agricultural land use and tillage systems in Argentine Pampas. PLoS ONE. 2014;9(6).
http://dx.doi.org/10.1371/journal.pone.0099949