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Bacterial diversity and bioaugmentation in floodwater of a paddy field in the presence of the herbicide molinate

2011Journal article Restricted access
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dc.contributor.authorBarreiros, Luisa
dc.contributor.authorManaia, Célia M.
dc.contributor.authorNunes, Olga C.
dc.date.accessioned2012-01-12T14:36:27Z
dc.date.available2012-01-12T14:36:27Z
dc.date.issued2011
dc.description.abstractThis work aimed at studying variations on the diversity and composition of the bacterial community of a rice paddy field floodwater, subjected to conventional management, namely by using the herbicide molinate. The promotion of the herbicide biodegradation either by the autochthonous microbiota or by a bioaugmentation process was also assessed. This study comprehended four sampling campaigns at key dates of the farming procedures (seeding, immediately and 6 days after application of the herbicide molinate, and after synthetic fertilization) and the subsequent physic-chemical and microbiological characterization (pH, DOC and molinate contents, total cells, cultivable bacteria and DGGE profiling) of the samples. Multivariate analysis of the DGGE profiles showed temporal variations in the bacterial community structure and the Shannon's index values indicated that the bacterial diversity reached its minimum at the molinate application day. The highest bacterial diversity coincided with the periods with undetectable concentrations of the herbicide, although microcosm assays suggested that other factors than molinate may have been responsible for the decrease of the bacterial diversity. The ability of autochthonous microorganisms to degrade molinate and the influence of the herbicide on the bacterial community composition were assessed in microcosm assays using floodwater collected at the same dates. Given molinate was not degraded by autochthonous microorganisms, and considering it represents an environmental contaminant, bioaugmentation microcosms were assayed aiming the assessment of the feasibility of a bioremediation process to clean contaminated floodwater. A molinate-mineralizing culture, previously isolated, promoted molinate removal, induced alterations in the autochthonous bacterial community structure and diversity, and was undetected after 7 days of incubation, suggesting the feasibility of the process.por
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.citationBARREIROS, Luísa; MANAIA, Célia M.; NUNES, Olga C. - Bacterial diversity and bioaugmentation in floodwater of a paddy field in the presence of the herbicide molinate. Biodegradation. ISSN 0923-9820 . Vol. 22 n.º 2 (2011), p. 445-461por
dc.identifier.doi10.1007/s10532-010-9417-1
dc.identifier.eissn1572-9729
dc.identifier.issn0923-9820
dc.identifier.urihttp://hdl.handle.net/10400.14/7444
dc.identifier.wosWOS:000287850700020
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherSpringerpor
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.subjectMolinatepor
dc.subjectBacterial community structure and compositionpor
dc.subjectBacterial diversitypor
dc.subjectBiodegradationpor
dc.titleBacterial diversity and bioaugmentation in floodwater of a paddy field in the presence of the herbicide molinatepor
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.endPage461
oaire.citation.issue2
oaire.citation.startPage445
oaire.citation.titleBiodegradation
oaire.citation.volume22
oaire.fundingStreamPOCI
person.familyNameBarreiros
person.familyNameManaia
person.familyNameNunes
person.givenNameLuisa
person.givenNameCélia
person.givenNameOlga
person.identifier.ciencia-id611F-E0C5-0230
person.identifier.ciencia-idC31F-553B-6365
person.identifier.ciencia-idBA14-BD30-C9AF
person.identifier.orcid0000-0003-3481-5809
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-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
relation.isAuthorOfPublication6357a6f0-b838-451f-8d2c-9622b2f19d30
relation.isAuthorOfPublicationa5f14577-0aed-4046-97da-5f4216c7aa07
relation.isAuthorOfPublication6b4a1abf-b245-41ad-8335-fa0f379650bb
relation.isAuthorOfPublication.latestForDiscoverya5f14577-0aed-4046-97da-5f4216c7aa07
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