Plant architecture of Paspalum vaginatum Schwartz modified by nitrate and ammonium nutrition

Detalhes bibliográficos
Autor(a) principal: Beltrano, José
Data de Publicação: 1999
Outros Autores: Ronco, Marta Guillermina, Barreiro, Roberto, Montaldi, Edgardo Raúl
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/5317
Resumo: Paspalum vaginatum Schwartz plants were grown under greenhouse conditions in a continuous-flow hydroponic culture, containing or or NH4NO3 as nitrogen source. After 30 days, the size of aerial biomass and root system decreased significantly when plants were supplied with as exclusive nitrogen source. Compared to treatment, reducing and non-reducing sugars were decreasing together with a significant increase in amino acids content. -nutrition caused tillers to grow toward an orthogravitropic position (average angle of 68° with respect to the horizontal), and with -nutrition, tillers tended to become diagravitropic (average angle of 23°). With NH4NO3 all the parameters measured had values in between those of the other two sources. Thus, the morphologic differences among plants growing in or nutrition confirm the hypothesis that nitrogen source determines the growth habit of tillers in P. vaginatum by modulating the endogenous levels of reducing-non-reducing sugars.
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spelling Plant architecture of Paspalum vaginatum Schwartz modified by nitrate and ammonium nutritionA arquitetura de Paspalum vaginatum Schwartz modificada pela nutrição de nitrato e amônionitrogen source; orthogravitropism; diagravitropism; sucrosefonte de nitrogênio; ortogravitrópico; diagravitrópico; sucrosePaspalum vaginatum Schwartz plants were grown under greenhouse conditions in a continuous-flow hydroponic culture, containing or or NH4NO3 as nitrogen source. After 30 days, the size of aerial biomass and root system decreased significantly when plants were supplied with as exclusive nitrogen source. Compared to treatment, reducing and non-reducing sugars were decreasing together with a significant increase in amino acids content. -nutrition caused tillers to grow toward an orthogravitropic position (average angle of 68° with respect to the horizontal), and with -nutrition, tillers tended to become diagravitropic (average angle of 23°). With NH4NO3 all the parameters measured had values in between those of the other two sources. Thus, the morphologic differences among plants growing in or nutrition confirm the hypothesis that nitrogen source determines the growth habit of tillers in P. vaginatum by modulating the endogenous levels of reducing-non-reducing sugars.Plantas de Paspalum vaginatum Schwartz foram cultivadas em casa de vegetação, em cultura hidropônica de fluxo contínuo, contendo , ou NH4NO3 como fontes exclusivas de nitrogênio. Após 30 dias, o peso da matéria seca da parte aérea e da raiz diminuiu significativamente quando as plantas receberam . Comparando esse tratamento com , ocorreu decréscimo no teor de açúcares redutores e não-redutores e aumento significativo no conteúdo de aminoácidos. A aplicação de causou crescimento das hastes na direção ortogravitrópica (ângulo médio de 68° em relação à horizontal), e nas plantas que receberam , as hastes tendiam a tornar-se diagravitrópicas (ângulo médio de 23°). Com NH4NO3, todos os parâmetros medidos apresentaram valores entre os das outras duas fontes. As diferenças morfológicas entre as plantas nutridas com ou confirmam a hipótese segundo a qual a fonte de nitrogênio determina o hábito de crescimento das hastes em Paspalum vaginatum ao regular os níveis endógenos dos açúcares redutores e não-redutores.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraBeltrano, JoséRonco, Marta GuillerminaBarreiro, RobertoMontaldi, Edgardo Raúl1999-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5317Pesquisa Agropecuaria Brasileira; v.34, n.7, jul. 1999; 1159-1166Pesquisa Agropecuária Brasileira; v.34, n.7, jul. 1999; 1159-11661678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5317/2509info:eu-repo/semantics/openAccess2012-02-16T11:45:43Zoai:ojs.seer.sct.embrapa.br:article/5317Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2012-02-16T11:45:43Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Plant architecture of Paspalum vaginatum Schwartz modified by nitrate and ammonium nutrition
A arquitetura de Paspalum vaginatum Schwartz modificada pela nutrição de nitrato e amônio
title Plant architecture of Paspalum vaginatum Schwartz modified by nitrate and ammonium nutrition
spellingShingle Plant architecture of Paspalum vaginatum Schwartz modified by nitrate and ammonium nutrition
Beltrano, José
nitrogen source; orthogravitropism; diagravitropism; sucrose
fonte de nitrogênio; ortogravitrópico; diagravitrópico; sucrose
title_short Plant architecture of Paspalum vaginatum Schwartz modified by nitrate and ammonium nutrition
title_full Plant architecture of Paspalum vaginatum Schwartz modified by nitrate and ammonium nutrition
title_fullStr Plant architecture of Paspalum vaginatum Schwartz modified by nitrate and ammonium nutrition
title_full_unstemmed Plant architecture of Paspalum vaginatum Schwartz modified by nitrate and ammonium nutrition
title_sort Plant architecture of Paspalum vaginatum Schwartz modified by nitrate and ammonium nutrition
author Beltrano, José
author_facet Beltrano, José
Ronco, Marta Guillermina
Barreiro, Roberto
Montaldi, Edgardo Raúl
author_role author
author2 Ronco, Marta Guillermina
Barreiro, Roberto
Montaldi, Edgardo Raúl
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Beltrano, José
Ronco, Marta Guillermina
Barreiro, Roberto
Montaldi, Edgardo Raúl
dc.subject.por.fl_str_mv nitrogen source; orthogravitropism; diagravitropism; sucrose
fonte de nitrogênio; ortogravitrópico; diagravitrópico; sucrose
topic nitrogen source; orthogravitropism; diagravitropism; sucrose
fonte de nitrogênio; ortogravitrópico; diagravitrópico; sucrose
description Paspalum vaginatum Schwartz plants were grown under greenhouse conditions in a continuous-flow hydroponic culture, containing or or NH4NO3 as nitrogen source. After 30 days, the size of aerial biomass and root system decreased significantly when plants were supplied with as exclusive nitrogen source. Compared to treatment, reducing and non-reducing sugars were decreasing together with a significant increase in amino acids content. -nutrition caused tillers to grow toward an orthogravitropic position (average angle of 68° with respect to the horizontal), and with -nutrition, tillers tended to become diagravitropic (average angle of 23°). With NH4NO3 all the parameters measured had values in between those of the other two sources. Thus, the morphologic differences among plants growing in or nutrition confirm the hypothesis that nitrogen source determines the growth habit of tillers in P. vaginatum by modulating the endogenous levels of reducing-non-reducing sugars.
publishDate 1999
dc.date.none.fl_str_mv 1999-07-01
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/5317
url https://seer.sct.embrapa.br/index.php/pab/article/view/5317
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/5317/2509
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.34, n.7, jul. 1999; 1159-1166
Pesquisa Agropecuária Brasileira; v.34, n.7, jul. 1999; 1159-1166
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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