Aeration and salt effects on indol acetic production by diazotrophic bacteria

Detalhes bibliográficos
Autor(a) principal: Radwan, Tharwat El-Sayed El-Desouk
Data de Publicação: 2005
Outros Autores: Mohamed, Mohamed Kamel, Reis, Veronica Massena
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/7056
Resumo: The production of indolic compounds by Azospirillum brasilense Cd, A. lipoferum Br 17, Herbaspirillum seropedicae Z 67, H. rubrisubalbicans M4, and strain 34 isolated from rice, which does not fit into the described Herbaspirillum species, was measured under aeration ratio and salt concentrations. Aeration of the medium increased growth and production of indole compounds by these bacteria. Under static condition, the production was higher both in nitrogen-free medium for Azospirillum, and in amended N medium for the Herbaspirillum strains. Increasing salt concentration into the medium inhibited the production of indole compounds, although a small increase in production was observed, when CaCl2 concentration was raised above 1 g L-1. Deleterious effect of salinity was more pronounced in the presence of NaHCO3, followed by NaCl and Na2SO4. Azospirillum produced more indolic compounds in semi-solid cultures, and Herbaspirillum in liquid medium, but at lower levels.
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spelling Aeration and salt effects on indol acetic production by diazotrophic bacteriaAeração e adição de sais na produção de ácido indol acético por bactérias diazotróficasAzospirillum; Herbaspirillum; auxin; indole-3-acetic acid; indole compoundsAzospirillum; Herbaspirillum; auxina; ácido-3-indol acético; compostos indólicos The production of indolic compounds by Azospirillum brasilense Cd, A. lipoferum Br 17, Herbaspirillum seropedicae Z 67, H. rubrisubalbicans M4, and strain 34 isolated from rice, which does not fit into the described Herbaspirillum species, was measured under aeration ratio and salt concentrations. Aeration of the medium increased growth and production of indole compounds by these bacteria. Under static condition, the production was higher both in nitrogen-free medium for Azospirillum, and in amended N medium for the Herbaspirillum strains. Increasing salt concentration into the medium inhibited the production of indole compounds, although a small increase in production was observed, when CaCl2 concentration was raised above 1 g L-1. Deleterious effect of salinity was more pronounced in the presence of NaHCO3, followed by NaCl and Na2SO4. Azospirillum produced more indolic compounds in semi-solid cultures, and Herbaspirillum in liquid medium, but at lower levels. Foi analisada a produção de compostos indólicos por Azospirillum brasilense Cd, A. lipoferum Br 17, Herbaspirillum seropedicae Z 67, H. rubrisubalbicans M4 e a estirpe 34 isolada de arroz, que não se enquadra em nenhuma das espécies de Herbaspirillum já descritas, em relação a diferentes condições de aeração e concentrações de sais. A maior aeração do meio propiciou aumento na produção de compostos indólicos pelas bactérias testadas. Foi verificado aumento desses compostos, em culturas estáticas, em meio sem nitrogênio no caso de Azospirillum, e na presença de N para as estirpes de Herbaspirillum. O aumento da concentração de líquido, mas sais no meio de cultivo inibiu a produção de compostos indólicos, embora tenha sido observado um pequeno aumento quando a concentração de CaCl2 foi de 1 g L-1. O efeito mais deletério da salinidade foi observado com a presença de NaHCO3, seguido de NaCl e Na2SO4. Azospirillum produziu mais compostos indólicos em meio semi-sólido e Herbaspirillum em meio em menor nível.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraRadwan, Tharwat El-Sayed El-DesoukMohamed, Mohamed KamelReis, Veronica Massena2005-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/7056Pesquisa Agropecuaria Brasileira; v.40, n.10, out. 2005; 997-1004Pesquisa Agropecuária Brasileira; v.40, n.10, out. 2005; 997-10041678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/7056/4104info:eu-repo/semantics/openAccess2014-09-19T19:08:58Zoai:ojs.seer.sct.embrapa.br:article/7056Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-19T19:08:58Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Aeration and salt effects on indol acetic production by diazotrophic bacteria
Aeração e adição de sais na produção de ácido indol acético por bactérias diazotróficas
title Aeration and salt effects on indol acetic production by diazotrophic bacteria
spellingShingle Aeration and salt effects on indol acetic production by diazotrophic bacteria
Radwan, Tharwat El-Sayed El-Desouk
Azospirillum; Herbaspirillum; auxin; indole-3-acetic acid; indole compounds
Azospirillum; Herbaspirillum; auxina; ácido-3-indol acético; compostos indólicos
title_short Aeration and salt effects on indol acetic production by diazotrophic bacteria
title_full Aeration and salt effects on indol acetic production by diazotrophic bacteria
title_fullStr Aeration and salt effects on indol acetic production by diazotrophic bacteria
title_full_unstemmed Aeration and salt effects on indol acetic production by diazotrophic bacteria
title_sort Aeration and salt effects on indol acetic production by diazotrophic bacteria
author Radwan, Tharwat El-Sayed El-Desouk
author_facet Radwan, Tharwat El-Sayed El-Desouk
Mohamed, Mohamed Kamel
Reis, Veronica Massena
author_role author
author2 Mohamed, Mohamed Kamel
Reis, Veronica Massena
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Radwan, Tharwat El-Sayed El-Desouk
Mohamed, Mohamed Kamel
Reis, Veronica Massena
dc.subject.por.fl_str_mv Azospirillum; Herbaspirillum; auxin; indole-3-acetic acid; indole compounds
Azospirillum; Herbaspirillum; auxina; ácido-3-indol acético; compostos indólicos
topic Azospirillum; Herbaspirillum; auxin; indole-3-acetic acid; indole compounds
Azospirillum; Herbaspirillum; auxina; ácido-3-indol acético; compostos indólicos
description The production of indolic compounds by Azospirillum brasilense Cd, A. lipoferum Br 17, Herbaspirillum seropedicae Z 67, H. rubrisubalbicans M4, and strain 34 isolated from rice, which does not fit into the described Herbaspirillum species, was measured under aeration ratio and salt concentrations. Aeration of the medium increased growth and production of indole compounds by these bacteria. Under static condition, the production was higher both in nitrogen-free medium for Azospirillum, and in amended N medium for the Herbaspirillum strains. Increasing salt concentration into the medium inhibited the production of indole compounds, although a small increase in production was observed, when CaCl2 concentration was raised above 1 g L-1. Deleterious effect of salinity was more pronounced in the presence of NaHCO3, followed by NaCl and Na2SO4. Azospirillum produced more indolic compounds in semi-solid cultures, and Herbaspirillum in liquid medium, but at lower levels.
publishDate 2005
dc.date.none.fl_str_mv 2005-10-01
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/7056
url https://seer.sct.embrapa.br/index.php/pab/article/view/7056
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/7056/4104
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.40, n.10, out. 2005; 997-1004
Pesquisa Agropecuária Brasileira; v.40, n.10, out. 2005; 997-1004
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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