Formation of 2,4-D bound residues in soils: New insights into microbial metabolism

Liliana Rocío Botero, Chistian Mougin, Gustavo Peñuela, Enrique Barriuso

Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

4 Citas (Scopus)

Resumen

© 2017 Elsevier B.V. The microbial contribution to the formation of bound residues in soils is studied by characterizing the metabolic activity of three microorganisms (Trametes versicolor, Fusarium solani and Ralstonia eutropha) on14C-2,4-dichlorophenoxyacetic acid (2,4-D) during incubation in synthetic liquid media and soil. A fractionation protocol was applied to quantify the14C-2,4-D that was incorporated into the biomass among biomolecular-like fractions. Successive fractionation of microbial biomass was implemented to break up and quantify the methanol/dichloromethane fraction (corresponding to the14C-lipid-like fraction), the trichloroacetic acid fraction (or hydrolysed14C-polysaccharide-like fraction) and the acid hydrolysable fraction (or the hydrolysed14C-protein-like fraction). Relevant differences in the 2,4-D degradation and biomass radioactivity distribution among the three microorganisms were found. The14C-protein-like fraction was the most consistent biomass fraction for reflecting the pesticide use capacity of the microorganisms under liquid and soil conditions. 2,4-D and its metabolite 4-chlorophenol were detected in methanol/dichloromethane and trichloroacetic acid fractions of the biomass of microorganisms exhibiting a low capacity to mineralize 2,4-D, thus proving that the microbial participation in the formation of bound residues while conserving the initial pesticide structure under natural soil conditions may be intimately associated with the lipid- and polysaccharide-like constituents. The fractionation protocol differentiates between14C that is incorporated into biomass as a biomolecular constituent and the pesticide or its metabolites that accumulate in the biomass and thus correspond to the stricto sensu definition of bound residues.
Idioma originalInglés estadounidense
Páginas (desde-hasta)715-722
Número de páginas8
PublicaciónScience of the Total Environment
DOI
EstadoPublicada - 15 abr 2017

Huella dactilar

2,4-Dichlorophenoxyacetic Acid
2,4 dichlorophenoxyacetic acid
Metabolism
Biomass
metabolism
Soils
biomass
Microorganisms
Fractionation
Pesticides
microorganism
Trichloroacetic acid
soil
Trichloroacetic Acid
fractionation
pesticide
Methylene Chloride
Dichloromethane
Polysaccharides
Metabolites

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abstract = "{\circledC} 2017 Elsevier B.V. The microbial contribution to the formation of bound residues in soils is studied by characterizing the metabolic activity of three microorganisms (Trametes versicolor, Fusarium solani and Ralstonia eutropha) on14C-2,4-dichlorophenoxyacetic acid (2,4-D) during incubation in synthetic liquid media and soil. A fractionation protocol was applied to quantify the14C-2,4-D that was incorporated into the biomass among biomolecular-like fractions. Successive fractionation of microbial biomass was implemented to break up and quantify the methanol/dichloromethane fraction (corresponding to the14C-lipid-like fraction), the trichloroacetic acid fraction (or hydrolysed14C-polysaccharide-like fraction) and the acid hydrolysable fraction (or the hydrolysed14C-protein-like fraction). Relevant differences in the 2,4-D degradation and biomass radioactivity distribution among the three microorganisms were found. The14C-protein-like fraction was the most consistent biomass fraction for reflecting the pesticide use capacity of the microorganisms under liquid and soil conditions. 2,4-D and its metabolite 4-chlorophenol were detected in methanol/dichloromethane and trichloroacetic acid fractions of the biomass of microorganisms exhibiting a low capacity to mineralize 2,4-D, thus proving that the microbial participation in the formation of bound residues while conserving the initial pesticide structure under natural soil conditions may be intimately associated with the lipid- and polysaccharide-like constituents. The fractionation protocol differentiates between14C that is incorporated into biomass as a biomolecular constituent and the pesticide or its metabolites that accumulate in the biomass and thus correspond to the stricto sensu definition of bound residues.",
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Formation of 2,4-D bound residues in soils: New insights into microbial metabolism. / Botero, Liliana Rocío; Mougin, Chistian; Peñuela, Gustavo; Barriuso, Enrique.

En: Science of the Total Environment, 15.04.2017, p. 715-722.

Resultado de la investigación: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva

TY - JOUR

T1 - Formation of 2,4-D bound residues in soils: New insights into microbial metabolism

AU - Botero, Liliana Rocío

AU - Mougin, Chistian

AU - Peñuela, Gustavo

AU - Barriuso, Enrique

PY - 2017/4/15

Y1 - 2017/4/15

N2 - © 2017 Elsevier B.V. The microbial contribution to the formation of bound residues in soils is studied by characterizing the metabolic activity of three microorganisms (Trametes versicolor, Fusarium solani and Ralstonia eutropha) on14C-2,4-dichlorophenoxyacetic acid (2,4-D) during incubation in synthetic liquid media and soil. A fractionation protocol was applied to quantify the14C-2,4-D that was incorporated into the biomass among biomolecular-like fractions. Successive fractionation of microbial biomass was implemented to break up and quantify the methanol/dichloromethane fraction (corresponding to the14C-lipid-like fraction), the trichloroacetic acid fraction (or hydrolysed14C-polysaccharide-like fraction) and the acid hydrolysable fraction (or the hydrolysed14C-protein-like fraction). Relevant differences in the 2,4-D degradation and biomass radioactivity distribution among the three microorganisms were found. The14C-protein-like fraction was the most consistent biomass fraction for reflecting the pesticide use capacity of the microorganisms under liquid and soil conditions. 2,4-D and its metabolite 4-chlorophenol were detected in methanol/dichloromethane and trichloroacetic acid fractions of the biomass of microorganisms exhibiting a low capacity to mineralize 2,4-D, thus proving that the microbial participation in the formation of bound residues while conserving the initial pesticide structure under natural soil conditions may be intimately associated with the lipid- and polysaccharide-like constituents. The fractionation protocol differentiates between14C that is incorporated into biomass as a biomolecular constituent and the pesticide or its metabolites that accumulate in the biomass and thus correspond to the stricto sensu definition of bound residues.

AB - © 2017 Elsevier B.V. The microbial contribution to the formation of bound residues in soils is studied by characterizing the metabolic activity of three microorganisms (Trametes versicolor, Fusarium solani and Ralstonia eutropha) on14C-2,4-dichlorophenoxyacetic acid (2,4-D) during incubation in synthetic liquid media and soil. A fractionation protocol was applied to quantify the14C-2,4-D that was incorporated into the biomass among biomolecular-like fractions. Successive fractionation of microbial biomass was implemented to break up and quantify the methanol/dichloromethane fraction (corresponding to the14C-lipid-like fraction), the trichloroacetic acid fraction (or hydrolysed14C-polysaccharide-like fraction) and the acid hydrolysable fraction (or the hydrolysed14C-protein-like fraction). Relevant differences in the 2,4-D degradation and biomass radioactivity distribution among the three microorganisms were found. The14C-protein-like fraction was the most consistent biomass fraction for reflecting the pesticide use capacity of the microorganisms under liquid and soil conditions. 2,4-D and its metabolite 4-chlorophenol were detected in methanol/dichloromethane and trichloroacetic acid fractions of the biomass of microorganisms exhibiting a low capacity to mineralize 2,4-D, thus proving that the microbial participation in the formation of bound residues while conserving the initial pesticide structure under natural soil conditions may be intimately associated with the lipid- and polysaccharide-like constituents. The fractionation protocol differentiates between14C that is incorporated into biomass as a biomolecular constituent and the pesticide or its metabolites that accumulate in the biomass and thus correspond to the stricto sensu definition of bound residues.

U2 - 10.1016/j.scitotenv.2017.01.105

DO - 10.1016/j.scitotenv.2017.01.105

M3 - Article

SP - 715

EP - 722

JO - Science of the Total Environment

JF - Science of the Total Environment

SN - 0048-9697

ER -