Nitrogen translocation as a function of the proportion of nitrate and ammonium

Detalhes bibliográficos
Autor(a) principal: Silveira, José Sebastião Machado
Data de Publicação: 2014
Outros Autores: Sant’Anna, Renato, Rena, Alemar Braga, Garcia, Rasmo
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/14962
Resumo: An experiment was carried out utilizing Guimeagrass (Panicum maximum Jacq) in a nutritive solution, under greenhouse conditions. When the plants were 25 days old, groups of them received 100 ppm of nitrogen in the form of  NO-3/NH+4 in the proportion of 100/0, 15/25, 50/50, 25/75 and 0/100. Six plants of eaçh group were cut at 1,5 cm from the base, 3, 24, 48 and 72 hours after the treatments. Xylem exudates were collected during 20 minutes. Nitrate represented about 80% of the xylem nitrogen in the 100/0 treatment. Ammonium varied from 7 to 15% depending on the treatments. Lysine, histidine, arginine, serine, alanine and glutamine were predominant in the highest nitrate treatments. On the other hand, asparagine and glutamine were predominant at higles ammonium concentration in the medium. Glutamine was the main organic nitrogen translocation.
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spelling Nitrogen translocation as a function of the proportion of nitrate and ammoniumTransporte de nitrogênio em função de várias proporções de nitrato e amônioplant nutrition; Panicum maximumnutrição vegetal; capim-coloniâo; Panicum maximumAn experiment was carried out utilizing Guimeagrass (Panicum maximum Jacq) in a nutritive solution, under greenhouse conditions. When the plants were 25 days old, groups of them received 100 ppm of nitrogen in the form of  NO-3/NH+4 in the proportion of 100/0, 15/25, 50/50, 25/75 and 0/100. Six plants of eaçh group were cut at 1,5 cm from the base, 3, 24, 48 and 72 hours after the treatments. Xylem exudates were collected during 20 minutes. Nitrate represented about 80% of the xylem nitrogen in the 100/0 treatment. Ammonium varied from 7 to 15% depending on the treatments. Lysine, histidine, arginine, serine, alanine and glutamine were predominant in the highest nitrate treatments. On the other hand, asparagine and glutamine were predominant at higles ammonium concentration in the medium. Glutamine was the main organic nitrogen translocation. O experimento foi conduzido em solução nutritiva com capim-coloniâo (Panicum maximum Jacq), em casa de vegetação. Aos 25 dias de idade, grupos de plantas foram submetidos a 100 ppm de nitrogênio, distribuídos na proporção de NO-3/NH+4 de 100/0, 75/25, 50/50, 25/25 e 0/100. Decorridas 3, 24, 48 e 72 horas de exposição aos tratamentos, decapitaram-se seis plantas de cada grupo, a 1,5 cm da base, e coletaram-se as exsudações do xilema por 20 min. O nitrato representou cerca de 80% das formas nitrogenadas de exsudação xilemática no tratamento 100/0. A participação do amônio variou de 7 a 15% nos diferentes tratamentos. Observou-se a predominância da lisina, histidina, arginina, serina, alanina e glutamina nas proporções mais elevadas de nitrato. Por outro lado, elevando-se a concentração de amônio no meio de cultivo, esta predominância ficou com a asparagina e a glutamina. A glutamina constituiu a principal forma orgânica de transporte do nitrogênio em capim-colonião.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraSilveira, José Sebastião MachadoSant’Anna, RenatoRena, Alemar BragaGarcia, Rasmo2014-04-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/14962Pesquisa Agropecuaria Brasileira; v.20, n.1, jan. 1985; 15-23Pesquisa Agropecuária Brasileira; v.20, n.1, jan. 1985; 15-231678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/14962/8680info:eu-repo/semantics/openAccess2014-04-16T19:30:15Zoai:ojs.seer.sct.embrapa.br:article/14962Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-16T19:30:15Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Nitrogen translocation as a function of the proportion of nitrate and ammonium
Transporte de nitrogênio em função de várias proporções de nitrato e amônio
title Nitrogen translocation as a function of the proportion of nitrate and ammonium
spellingShingle Nitrogen translocation as a function of the proportion of nitrate and ammonium
Silveira, José Sebastião Machado
plant nutrition; Panicum maximum
nutrição vegetal; capim-coloniâo; Panicum maximum
title_short Nitrogen translocation as a function of the proportion of nitrate and ammonium
title_full Nitrogen translocation as a function of the proportion of nitrate and ammonium
title_fullStr Nitrogen translocation as a function of the proportion of nitrate and ammonium
title_full_unstemmed Nitrogen translocation as a function of the proportion of nitrate and ammonium
title_sort Nitrogen translocation as a function of the proportion of nitrate and ammonium
author Silveira, José Sebastião Machado
author_facet Silveira, José Sebastião Machado
Sant’Anna, Renato
Rena, Alemar Braga
Garcia, Rasmo
author_role author
author2 Sant’Anna, Renato
Rena, Alemar Braga
Garcia, Rasmo
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Silveira, José Sebastião Machado
Sant’Anna, Renato
Rena, Alemar Braga
Garcia, Rasmo
dc.subject.por.fl_str_mv plant nutrition; Panicum maximum
nutrição vegetal; capim-coloniâo; Panicum maximum
topic plant nutrition; Panicum maximum
nutrição vegetal; capim-coloniâo; Panicum maximum
description An experiment was carried out utilizing Guimeagrass (Panicum maximum Jacq) in a nutritive solution, under greenhouse conditions. When the plants were 25 days old, groups of them received 100 ppm of nitrogen in the form of  NO-3/NH+4 in the proportion of 100/0, 15/25, 50/50, 25/75 and 0/100. Six plants of eaçh group were cut at 1,5 cm from the base, 3, 24, 48 and 72 hours after the treatments. Xylem exudates were collected during 20 minutes. Nitrate represented about 80% of the xylem nitrogen in the 100/0 treatment. Ammonium varied from 7 to 15% depending on the treatments. Lysine, histidine, arginine, serine, alanine and glutamine were predominant in the highest nitrate treatments. On the other hand, asparagine and glutamine were predominant at higles ammonium concentration in the medium. Glutamine was the main organic nitrogen translocation.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-16
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/14962
url https://seer.sct.embrapa.br/index.php/pab/article/view/14962
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/14962/8680
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.20, n.1, jan. 1985; 15-23
Pesquisa Agropecuária Brasileira; v.20, n.1, jan. 1985; 15-23
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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