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Environmental factors influencing molinate biodegradation by a two-member mixed culture in rice paddy field floodwater

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dc.contributor.authorBarreiros, Luisa
dc.contributor.authorPeres, Joana
dc.contributor.authorAzevedo, Nuno F.
dc.contributor.authorManaia, Célia M.
dc.contributor.authorNunes, Olga C.
dc.date.accessioned2013-01-28T10:55:12Z
dc.date.available2013-01-28T10:55:12Z
dc.date.issued2012
dc.description.abstractBioaugmentation is reported as a feasible approach for the treatment of pesticide contaminated environments. Aiming the development and future implementation of a bioremediation process to treat natural waters polluted with molinate, a molinate-mineralizing culture, composed of Pseudomonas chlororaphis ON1 and Gulosibacter molinativorax ON4T (designated DC1), was assayed in paddy field floodwater microcosms. The influence of abiotic (temperature, presence of other herbicides) and biotic (floodwater autochthonous microbiota) factors on molinate mineralization by culture DC1 was assessed. In parallel, the proportion of the introduced strains in filter-sterilized floodwaters was monitored by fluorescent in situ hybridization (FISH). Molinate mineralization and growth of culture DC1 were observed under all tested conditions, although the kinetic parameters (maximum specific growth and degradation rates) were significantly affected by the environmental conditions and culture media used. Additionally, these two factors were observed to have a statistically significant interaction. The lowest values of both kinetic parameters were observed at 15 °C. The presence of the herbicides propanil, bentazone and MCPA, frequently applied in rice culture protection, did not affect the degrading capacity of culture DC1. Furthermore, it was possible to infer that the autochthonous microbiota does not retard or limit molinate biodegradation, given the growth and degradation rates by culture DC1 were higher in non-sterile microcosm assays. Although G. molinativorax ON4T is known to promote the initial breakdown of molinate, P. chlororaphis ON1 appeared to be responsible to pull up the process, since higher proportions of this organism were found at the exponential growth and molinate degradation phase. Culture DC1 is efficient, versatile and presents a promising potential to be applied as a bioaugmentation tool for the remediation of environmental waters contaminated with molinate.por
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.citationBARREIROS, Luisa ...[et al.] - Environmental factors influencing molinate biodegradation by a two-member mixed culture in rice paddy field floodwater. International Biodeterioration & Biodegradation. ISSN 0964-8305. 72 (2012), p. 52-58por
dc.identifier.doi10.1016/j.ibiod.2012.05.003
dc.identifier.eissn1879-0208
dc.identifier.issn0964-8305
dc.identifier.urihttp://hdl.handle.net/10400.14/9962
dc.identifier.wosWOS:000307613400008
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.relationDEGRADAÇÃO BIOLÓGICA DO MOLINATO POR UMA CULTURA MISTA BACTERIANA – ESTUDO DA DINÂMICA POPULACIONAL
dc.relationBioremediation of soils and waters contaminated with pesticides
dc.subjectFloodwaterpor
dc.subjectHerbicide degradationpor
dc.subjectBioaugmentationpor
dc.subjectBiotic and abiotic factorspor
dc.subjectKinetic parameterspor
dc.subjectFISHpor
dc.titleEnvironmental factors influencing molinate biodegradation by a two-member mixed culture in rice paddy field floodwaterpor
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleDEGRADAÇÃO BIOLÓGICA DO MOLINATO POR UMA CULTURA MISTA BACTERIANA – ESTUDO DA DINÂMICA POPULACIONAL
oaire.awardTitleBioremediation of soils and waters contaminated with pesticides
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F22615%2F2005/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCI%2FAMB%2F59836%2F2004/PT
oaire.citation.endPage58
oaire.citation.startPage52
oaire.citation.titleInternational Biodeterioration & Biodegradation
oaire.citation.volume72
oaire.fundingStreamPOCI
person.familyNameBarreiros
person.familyNamePeres
person.familyNameAzevedo
person.familyNameManaia
person.familyNameNunes
person.givenNameLuisa
person.givenNameJoana
person.givenNameNuno
person.givenNameCélia
person.givenNameOlga
person.identifier47978
person.identifier.ciencia-id611F-E0C5-0230
person.identifier.ciencia-idAA14-1695-765E
person.identifier.ciencia-idBE1B-918B-A853
person.identifier.ciencia-idC31F-553B-6365
person.identifier.ciencia-idBA14-BD30-C9AF
person.identifier.orcid0000-0003-3481-5809
person.identifier.orcid0000-0001-5165-2488
person.identifier.orcid0000-0001-5864-3250
person.identifier.orcid0000-0002-3674-1789
person.identifier.orcid0000-0003-4742-2537
person.identifier.ridD-7950-2013
person.identifier.scopus-author-id6508205485
person.identifier.scopus-author-id35820227900
person.identifier.scopus-author-id8092231700
person.identifier.scopus-author-id6602465318
person.identifier.scopus-author-id7005088596
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
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