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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
16/08/1995 |
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Data da última atualização: |
06/04/2017 |
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Autoria: |
TOBAR, R.; AZCON, R.; BAREA, J. M. |
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Título: |
Improved nitrogen uptake and transport from 15N-labelled nitrate by external hyphae of arbuscular mycorrhiza under water-stressed conditions. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
New Phytologist, v.126, n.1, p.119-122, 1994. |
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Idioma: |
Inglês |
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Conteúdo: |
The significance of the external mycelium of arbuscular mycorrhiza for uptake and transport of N from 15N-labelled nitrate in benefiting plant nutrition, was evaluated under either well-irrigated or water-stressed conditions. Plants of lettuce (Lactuca sativa L.) were grown controlled conditions in a neutral agricultural soil/sand mix either non-mycorrhizal or in association with the arbuscular-mycorrhizal fungus, Glomus faciculatum (Taxter sensu Gerd.) Gerd. and Trappe. The pots comprised a two-compartment system, where a fine nylon mesh screen prevented the development of roots in a hyphal compartment. 15NO3 was applied to this hyphal compartment where access of the root was not possible. At harvest, the 15N enrichment in plant tissues was the same for boyh mycorrhizal and non-mycorrhizal plants under optimal water supply conditions. However, under water-stressed conditions, where the mass flow and diffusion of NO3-ions to the roots can be affected the 15N enrichment was four times higher in mycorrhizal than in non-mycorrhizal plants. This provids evidence of hyphal transport of N from a nitrate source, supporting the view that arbuscular mycorrhiza can be important for the N-nutrition of plants in relatively dry agricultural soil where nitrate is actually the predominat nitrogen form. |
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Palavras-Chave: |
Mycorrhiza. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01796naa a2200157 a 4500
001 1785660
005 2017-04-06
008 1994 bl --- 0-- u #d
100 1 $aTOBAR, R.
245 $aImproved nitrogen uptake and transport from 15N-labelled nitrate by external hyphae of arbuscular mycorrhiza under water-stressed conditions.
260 $c1994
520 $aThe significance of the external mycelium of arbuscular mycorrhiza for uptake and transport of N from 15N-labelled nitrate in benefiting plant nutrition, was evaluated under either well-irrigated or water-stressed conditions. Plants of lettuce (Lactuca sativa L.) were grown controlled conditions in a neutral agricultural soil/sand mix either non-mycorrhizal or in association with the arbuscular-mycorrhizal fungus, Glomus faciculatum (Taxter sensu Gerd.) Gerd. and Trappe. The pots comprised a two-compartment system, where a fine nylon mesh screen prevented the development of roots in a hyphal compartment. 15NO3 was applied to this hyphal compartment where access of the root was not possible. At harvest, the 15N enrichment in plant tissues was the same for boyh mycorrhizal and non-mycorrhizal plants under optimal water supply conditions. However, under water-stressed conditions, where the mass flow and diffusion of NO3-ions to the roots can be affected the 15N enrichment was four times higher in mycorrhizal than in non-mycorrhizal plants. This provids evidence of hyphal transport of N from a nitrate source, supporting the view that arbuscular mycorrhiza can be important for the N-nutrition of plants in relatively dry agricultural soil where nitrate is actually the predominat nitrogen form.
653 $aMycorrhiza
700 1 $aAZCON, R.
700 1 $aBAREA, J. M.
773 $tNew Phytologist$gv.126, n.1, p.119-122, 1994.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
11/09/2015 |
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Data da última atualização: |
11/09/2015 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
PEREIRA, M.; ALMEIDA, R. G. de; BUNGENSTAB, D. J.; MORAIS, M. G.; MACEDO, M. C. M. |
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Afiliação: |
MARIANA PEREIRA, MS in Animal Science, Univ. Federal de Mato Grosso do Sul, Campo Grande, 79090-900, MS, Brazil; ROBERTO GIOLO DE ALMEIDA, CNPGC; DAVI JOSE BUNGENSTAB, CNPGC; MARIA G. MORAIS, UFMS; MANUEL CLAUDIO MOTTA MACEDO, CNPGC. |
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Título: |
Panicum maximum genotypes yield under integrated crop-livestock-forest system in the Brazilian Cerrado. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: WORLD CONGRESS ON INTEGRATED CROP-LIVESTOCK-FOREST SYSTEMS; INTERNATIONAL SYMPOSIUM ON INTEGRATED CROP-LIVESTOCK SYSTEMS, 3., 2015, Brasília, DF. Towards sustainable intensification: proceedings. Brasília, DF: Embrapa, 2015. |
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Páginas: |
1 p. |
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Idioma: |
Inglês |
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Palavras-Chave: |
Cerrado brasileiro; Genótipos; Genotypes; Massai; Sistema de integração lavoura pecuária floresta. |
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Thesagro: |
Panicum Maximum. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/129407/1/APHM.pdf
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Marc: |
LEADER 00901nam a2200229 a 4500
001 2023722
005 2015-09-11
008 2015 bl uuuu u00u1 u #d
100 1 $aPEREIRA, M.
245 $aPanicum maximum genotypes yield under integrated crop-livestock-forest system in the Brazilian Cerrado.$h[electronic resource]
260 $aIn: WORLD CONGRESS ON INTEGRATED CROP-LIVESTOCK-FOREST SYSTEMS; INTERNATIONAL SYMPOSIUM ON INTEGRATED CROP-LIVESTOCK SYSTEMS, 3., 2015, Brasília, DF. Towards sustainable intensification: proceedings. Brasília, DF: Embrapa$c2015
300 $a1 p.
650 $aPanicum Maximum
653 $aCerrado brasileiro
653 $aGenótipos
653 $aGenotypes
653 $aMassai
653 $aSistema de integração lavoura pecuária floresta
700 1 $aALMEIDA, R. G. de
700 1 $aBUNGENSTAB, D. J.
700 1 $aMORAIS, M. G.
700 1 $aMACEDO, M. C. M.
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