Plant architecture of <i>Paspalum vaginatum</i> schwartz modified by nitrate and ammonium nutrition : Arquitetura de Paspalum vaginatum Schwartz modificada pela nutrição de nitrato e amônio

<i>Paspalum vaginatum</i> Schwartz plants were grown under greenhouse conditions in a continuous-flow hydroponic culture, containing NO-<SUB>3</SUB> or NH+<SUB>4</SUB> or NH<SUB>4</SUB>NO<SUB>3</SUB> as nitrogen source. After 30 days, the s...

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Autores principales: Beltrano, José, Ronco, Marta Guillermina, Barreiro, Roberto, Montaldi, Edgardo Raúl
Formato: Articulo
Lenguaje:Inglés
Publicado: 1999
Materias:
Ciencias Naturales
Botánica
diagravitropism
nitrogen source
orthogravitropism
aucrose
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/35468
http://www.scielo.br/pdf/pab/v34n7/8203.pdf
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-35468
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Botánica
diagravitropism
nitrogen source
orthogravitropism
aucrose
spellingShingle Ciencias Naturales
Botánica
diagravitropism
nitrogen source
orthogravitropism
aucrose
Beltrano, José
Ronco, Marta Guillermina
Barreiro, Roberto
Montaldi, Edgardo Raúl
Plant architecture of <i>Paspalum vaginatum</i> schwartz modified by nitrate and ammonium nutrition : Arquitetura de Paspalum vaginatum Schwartz modificada pela nutrição de nitrato e amônio
topic_facet Ciencias Naturales
Botánica
diagravitropism
nitrogen source
orthogravitropism
aucrose
description <i>Paspalum vaginatum</i> Schwartz plants were grown under greenhouse conditions in a continuous-flow hydroponic culture, containing NO-<SUB>3</SUB> or NH+<SUB>4</SUB> or NH<SUB>4</SUB>NO<SUB>3</SUB> as nitrogen source. After 30 days, the size of aerial biomass and root system decreased significantly when plants were supplied with NH+<SUB>4</SUB> as exclusive nitrogen source. Compared to NO-<SUB>3</SUB> treatment, reducing and non-reducing sugars were decreasing together with a significant increase in amino acids content. NH+<SUB>4</SUB>-nutrition caused tillers to grow toward an orthogravitropic position (average angle of 68° with respect to the horizontal), and with NO-<SUB>3</SUB>-nutrition, tillers tended to become diagravitropic (average angle of 23°). With NH<SUB>4</SUB>NO<SUB>3</SUB> all the parameters measured had values in between those of the other two sources. Thus, the morphologic differences among plants growing in NO-<SUB>3</SUB> or NH+<SUB>4</SUB> 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.
format Articulo
Articulo
author Beltrano, José
Ronco, Marta Guillermina
Barreiro, Roberto
Montaldi, Edgardo Raúl
author_facet Beltrano, José
Ronco, Marta Guillermina
Barreiro, Roberto
Montaldi, Edgardo Raúl
author_sort Beltrano, José
title Plant architecture of <i>Paspalum vaginatum</i> schwartz modified by nitrate and ammonium nutrition : Arquitetura de Paspalum vaginatum Schwartz modificada pela nutrição de nitrato e amônio
title_short Plant architecture of <i>Paspalum vaginatum</i> schwartz modified by nitrate and ammonium nutrition : Arquitetura de Paspalum vaginatum Schwartz modificada pela nutrição de nitrato e amônio
title_full Plant architecture of <i>Paspalum vaginatum</i> schwartz modified by nitrate and ammonium nutrition : Arquitetura de Paspalum vaginatum Schwartz modificada pela nutrição de nitrato e amônio
title_fullStr Plant architecture of <i>Paspalum vaginatum</i> schwartz modified by nitrate and ammonium nutrition : Arquitetura de Paspalum vaginatum Schwartz modificada pela nutrição de nitrato e amônio
title_full_unstemmed Plant architecture of <i>Paspalum vaginatum</i> schwartz modified by nitrate and ammonium nutrition : Arquitetura de Paspalum vaginatum Schwartz modificada pela nutrição de nitrato e amônio
title_sort plant architecture of <i>paspalum vaginatum</i> schwartz modified by nitrate and ammonium nutrition : arquitetura de paspalum vaginatum schwartz modificada pela nutrição de nitrato e amônio
publishDate 1999
url http://sedici.unlp.edu.ar/handle/10915/35468
http://www.scielo.br/pdf/pab/v34n7/8203.pdf
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