Root-mediated bacterial accessibility and cometabolism of pyrene in soil
13 páginas.-- 6 figuras.- 1 tablas.- 43 referencias.- Supplementary data to this article can be found online at https://doi.org/10.1016/j.scitotenv.2020.143408
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Elsevier
2021-03-15
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Subjects: | Bacteria, Biodegradation, Bioremediation, Polycyclic aromatic hydrocarbons, Sunflower, |
Online Access: | http://hdl.handle.net/10261/224354 http://dx.doi.org/10.13039/501100004837 http://dx.doi.org/10.13039/501100003329 |
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dig-irnas-es-10261-2243542021-03-19T08:14:44Z Root-mediated bacterial accessibility and cometabolism of pyrene in soil Fernández-López, Carmen Posada Baquero, Rosa García Fernández, José Luis Castilla-Alcántara, J. C. Cantos, Manuel Ortega Calvo, J. J. Ministerio de Economía y Competitividad (España) Ministerio de Ciencia e Innovación (España) Fernández-López, Carmen [0000-0003-2868-0231] Posada Baquero, Rosa [0000-0003-2726-7357] García Fernández, José Luis [0000-0001-7880-2343] Castilla-Alcántara, J. C. [0000-0002-9123-1052] Cantos, Manuel [0000-0001-8672-4437] Ortega Calvo, J. J. [0000-0003-1672-5199] Bacteria Biodegradation Bioremediation Polycyclic aromatic hydrocarbons Sunflower 13 páginas.-- 6 figuras.- 1 tablas.- 43 referencias.- Supplementary data to this article can be found online at https://doi.org/10.1016/j.scitotenv.2020.143408 Partial transformation of pollutants and mobilization of the produced metabolites may contribute significantly to the risks resulting from biological treatment of soils polluted by hydrophobic chemicals such as polycyclic aromatic hydrocarbons (PAHs). Pyrene, a four-ringed PAH, was selected here as a model pollutant to study the effects of sunflower plants on the bacterial accessibility and cometabolism of this pollutant when located at a spatially distant source within soil. We compared the transformation of passively dosed 14C-labeled pyrene in soil slurries and planted pots that were inoculated with the bacterium Pseudomonas putida G7. This bacterium combines flagellar cell motility with the ability to cometabolically transform pyrene. Cometabolism of this PAH occurred immediately in the inoculated and shaken soil slurries, where the bacteria had full access to the passive dosing devices (silicone O-rings). Root exudates did not enhance the survival of P. putida G7 cells in soil slurries, but doubled their transport in column tests. In greenhouse-incubated soil pots with the same pyrene sources instead located centimeters from the soil surface, the inoculated bacteria transformed 14C-labeled pyrene only when the pots were planted with sunflowers. Bacterial inoculation caused mobilization of 14C-labeled pyrene metabolites into the leachates of the planted pots at concentrations of approximately 1 mg L−1, ten times greater than the water solubility of the parent compound. This mobilization resulted in a doubled specific root uptake rate of 14C-labeled pyrene equivalents and a significantly decreased root-to-fruit transfer rate. Our results show that the plants facilitated bacterial access to the distant pollutant source, possibly by increasing bacterial dispersal in the soil; this increased bacterial access was associated with cometabolism, which contributed to the risks of biodegradation. © 2020 Elsevier B.V. We thank the Spanish Ministries of Economy and Competitiveness ( CGL2016-77497-R ) and Science and Innovation ( PID2019-109700RB-C21 ) for supporting this work. Peer reviewed 2020-12-04T07:59:19Z 2020-12-04T07:59:19Z 2021-03-15 artículo http://purl.org/coar/resource_type/c_6501 Science of The Total Environment (760): 143408 (2021) 0048-9697 http://hdl.handle.net/10261/224354 10.1016/j.scitotenv.2020.143408 http://dx.doi.org/10.13039/501100004837 http://dx.doi.org/10.13039/501100003329 en #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CGL2016-77497-R info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109700RB-C21 Postprint http://dx.doi.org/10.1016/j.scitotenv.2020.143408 Sí embargo_20230315 Elsevier |
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Bacteria Biodegradation Bioremediation Polycyclic aromatic hydrocarbons Sunflower Bacteria Biodegradation Bioremediation Polycyclic aromatic hydrocarbons Sunflower |
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Bacteria Biodegradation Bioremediation Polycyclic aromatic hydrocarbons Sunflower Bacteria Biodegradation Bioremediation Polycyclic aromatic hydrocarbons Sunflower Fernández-López, Carmen Posada Baquero, Rosa García Fernández, José Luis Castilla-Alcántara, J. C. Cantos, Manuel Ortega Calvo, J. J. Root-mediated bacterial accessibility and cometabolism of pyrene in soil |
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13 páginas.-- 6 figuras.- 1 tablas.- 43 referencias.- Supplementary data to this article can be found online at https://doi.org/10.1016/j.scitotenv.2020.143408 |
author2 |
Ministerio de Economía y Competitividad (España) |
author_facet |
Ministerio de Economía y Competitividad (España) Fernández-López, Carmen Posada Baquero, Rosa García Fernández, José Luis Castilla-Alcántara, J. C. Cantos, Manuel Ortega Calvo, J. J. |
format |
artículo |
topic_facet |
Bacteria Biodegradation Bioremediation Polycyclic aromatic hydrocarbons Sunflower |
author |
Fernández-López, Carmen Posada Baquero, Rosa García Fernández, José Luis Castilla-Alcántara, J. C. Cantos, Manuel Ortega Calvo, J. J. |
author_sort |
Fernández-López, Carmen |
title |
Root-mediated bacterial accessibility and cometabolism of pyrene in soil |
title_short |
Root-mediated bacterial accessibility and cometabolism of pyrene in soil |
title_full |
Root-mediated bacterial accessibility and cometabolism of pyrene in soil |
title_fullStr |
Root-mediated bacterial accessibility and cometabolism of pyrene in soil |
title_full_unstemmed |
Root-mediated bacterial accessibility and cometabolism of pyrene in soil |
title_sort |
root-mediated bacterial accessibility and cometabolism of pyrene in soil |
publisher |
Elsevier |
publishDate |
2021-03-15 |
url |
http://hdl.handle.net/10261/224354 http://dx.doi.org/10.13039/501100004837 http://dx.doi.org/10.13039/501100003329 |
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