Degradation and formation of non-extractable or bound residues of the atrazine herbicide in soil

Detalhes bibliográficos
Autor(a) principal: Nakagawa, Lia Emi
Data de Publicação: 2000
Outros Autores: Andréa, Mara Mercedes de
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/5922
Resumo: The persistence of a pesticide in soil depends on the dissipation processes, as degradation, that can be related with microbial metabolism. Aiming to evaluate the mechanisms of atrazine dissipation in soil, and the importance of the microorganisms in this process, its mineralization, intermediate degradation and non-extractable or bound residues formation were evaluated after the application of 14C-atrazine in a Gley Humic soil. The processes were quantified by radiometric and chromatographic techniques in natural, sterilized and sterilized soil samples inoculated with Pseudomonas putida. The importance of microorganisms was observed through biomineralization studies, because the mineralization of 14C-atrazine was detected only in natural soil (about 15%). However, formation of extractable metabolites of atrazine was detected both in sterilized (67%) and natural (75%) soil samples, indicating that these processes were not dependent only on the presence of microorganisms. On the other hand, bound residues were formed in higher amount (about 56%) in sterilized soil.
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spelling Degradation and formation of non-extractable or bound residues of the atrazine herbicide in soilDegradação e formação de resíduos não-extraíveis ou ligados do herbicida atrazina em solopesticide actions; metabolites; microorganisms; mineralizationação dos pesticidas; metabólitos; microrganismos; mineralizaçãoThe persistence of a pesticide in soil depends on the dissipation processes, as degradation, that can be related with microbial metabolism. Aiming to evaluate the mechanisms of atrazine dissipation in soil, and the importance of the microorganisms in this process, its mineralization, intermediate degradation and non-extractable or bound residues formation were evaluated after the application of 14C-atrazine in a Gley Humic soil. The processes were quantified by radiometric and chromatographic techniques in natural, sterilized and sterilized soil samples inoculated with Pseudomonas putida. The importance of microorganisms was observed through biomineralization studies, because the mineralization of 14C-atrazine was detected only in natural soil (about 15%). However, formation of extractable metabolites of atrazine was detected both in sterilized (67%) and natural (75%) soil samples, indicating that these processes were not dependent only on the presence of microorganisms. On the other hand, bound residues were formed in higher amount (about 56%) in sterilized soil.A persistência de um pesticida no solo depende de processos de dissipação, como a degradação, que pode estar relacionada com o metabolismo microbiano. Com o objetivo de se avaliar os mecanismos de dissipação do herbicida atrazina no solo e a importância dos microrganismos neste processo, avaliou-se sua mineralização, degradação intermediária e formação de resíduos não-extraíveis ou ligados ao solo após aplicação de 14C-atrazina em solo Glei Húmico. Os processos foram quantificados através de técnicas radiométricas e cromatográficas em solo natural, solo esterilizado e solo esterilizado e infectado com Pseudomonas putida. Observou-se a importância dos microrganismos através dos estudos de biomineralização nos quais detectou-se mineralização de 14C-atrazina somente em solo natural (cerca de 15%). Entretanto, houve formação de metabólitos extraíveis de atrazina, tanto em solo esterilizado (67%) como em solo natural (75%), o que indica que este processo não dependeu apenas da presença de microrganismos. Já os resíduos não-extraíveis foram formados em maior quantidade (cerca de 56%) no solo esterilizado.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraNakagawa, Lia EmiAndréa, Mara Mercedes de2000-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5922Pesquisa Agropecuaria Brasileira; v.35, n.8, ago. 2000; 1509-1515Pesquisa Agropecuária Brasileira; v.35, n.8, ago. 2000; 1509-15151678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5922/3026info:eu-repo/semantics/openAccess2011-08-26T13:07:42Zoai:ojs.seer.sct.embrapa.br:article/5922Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2011-08-26T13:07:42Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Degradation and formation of non-extractable or bound residues of the atrazine herbicide in soil
Degradação e formação de resíduos não-extraíveis ou ligados do herbicida atrazina em solo
title Degradation and formation of non-extractable or bound residues of the atrazine herbicide in soil
spellingShingle Degradation and formation of non-extractable or bound residues of the atrazine herbicide in soil
Nakagawa, Lia Emi
pesticide actions; metabolites; microorganisms; mineralization
ação dos pesticidas; metabólitos; microrganismos; mineralização
title_short Degradation and formation of non-extractable or bound residues of the atrazine herbicide in soil
title_full Degradation and formation of non-extractable or bound residues of the atrazine herbicide in soil
title_fullStr Degradation and formation of non-extractable or bound residues of the atrazine herbicide in soil
title_full_unstemmed Degradation and formation of non-extractable or bound residues of the atrazine herbicide in soil
title_sort Degradation and formation of non-extractable or bound residues of the atrazine herbicide in soil
author Nakagawa, Lia Emi
author_facet Nakagawa, Lia Emi
Andréa, Mara Mercedes de
author_role author
author2 Andréa, Mara Mercedes de
author2_role author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Nakagawa, Lia Emi
Andréa, Mara Mercedes de
dc.subject.por.fl_str_mv pesticide actions; metabolites; microorganisms; mineralization
ação dos pesticidas; metabólitos; microrganismos; mineralização
topic pesticide actions; metabolites; microorganisms; mineralization
ação dos pesticidas; metabólitos; microrganismos; mineralização
description The persistence of a pesticide in soil depends on the dissipation processes, as degradation, that can be related with microbial metabolism. Aiming to evaluate the mechanisms of atrazine dissipation in soil, and the importance of the microorganisms in this process, its mineralization, intermediate degradation and non-extractable or bound residues formation were evaluated after the application of 14C-atrazine in a Gley Humic soil. The processes were quantified by radiometric and chromatographic techniques in natural, sterilized and sterilized soil samples inoculated with Pseudomonas putida. The importance of microorganisms was observed through biomineralization studies, because the mineralization of 14C-atrazine was detected only in natural soil (about 15%). However, formation of extractable metabolites of atrazine was detected both in sterilized (67%) and natural (75%) soil samples, indicating that these processes were not dependent only on the presence of microorganisms. On the other hand, bound residues were formed in higher amount (about 56%) in sterilized soil.
publishDate 2000
dc.date.none.fl_str_mv 2000-08-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/5922
url https://seer.sct.embrapa.br/index.php/pab/article/view/5922
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/5922/3026
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.35, n.8, ago. 2000; 1509-1515
Pesquisa Agropecuária Brasileira; v.35, n.8, ago. 2000; 1509-1515
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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