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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
10/01/2010 |
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Data da última atualização: |
17/10/2011 |
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Autoria: |
CHAPIN, F. S.; BIELESKI, R. L. |
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Título: |
Mild phosphorus stress in barley and a related low-phosphorus-adapted barleygrass: phosphorus fractions and phosphate absorption in relation to growth. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Physiologia Plantarum, Copenhagen, v. 54, n. 3, p. 309-317, 1982. |
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Idioma: |
Inglês |
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Conteúdo: |
Barleygrass (Hordeum leporinum) from Australian low-P (phosphorus) soils and commercial barley (H. vulgare) with high fertilizer requirements were grown in solution culture at 3 levels of P supply. The high-P-adapted barley produced more biomass at all levels of P supply and was more responsive to added P in terms of rate of tillering, rate of leaf production, final leaf size, and therefore total shoot weight compared to barleygrass. In both species root: shoot ratio decreased in response to improved tissue P status, even at P levels where total biomass did not respond to P supply. Removal of endosperm reserves of barley reduced total biomass to a greater extent than it altered phosphate absorption rate, thus increasing tissue P status and making plants less responsive to added P. Similarly, barleygrass had a slower growth rate but a comparable P absorption rate to that of barley. Thus barleygrass also accumulated tissue P and was unresponsive to added P. All phosphorus chemical fractions increased in response to improved tissue P status, but to differing extents (inorganic-P > nucleic acid-P > lipid-P > ester-P), suggesting that all P fractions (particularly inorganic P) serve, in part, a storage function. Both barleygrass and barley without endosperm had higher concentrations of all P fractions (particularly inorganic P) than did unaltered barley, but this was due entirely to their higher P status (due to slow growth) rather than to any major difference in P metabolism between species. We conclude that slow growth is more important than interspecific differences in P metabolism, P absorption, or efficiency of P utilization in explaining the success of barleygrass and other low-P-adapted species on infertile soils. MenosBarleygrass (Hordeum leporinum) from Australian low-P (phosphorus) soils and commercial barley (H. vulgare) with high fertilizer requirements were grown in solution culture at 3 levels of P supply. The high-P-adapted barley produced more biomass at all levels of P supply and was more responsive to added P in terms of rate of tillering, rate of leaf production, final leaf size, and therefore total shoot weight compared to barleygrass. In both species root: shoot ratio decreased in response to improved tissue P status, even at P levels where total biomass did not respond to P supply. Removal of endosperm reserves of barley reduced total biomass to a greater extent than it altered phosphate absorption rate, thus increasing tissue P status and making plants less responsive to added P. Similarly, barleygrass had a slower growth rate but a comparable P absorption rate to that of barley. Thus barleygrass also accumulated tissue P and was unresponsive to added P. All phosphorus chemical fractions increased in response to improved tissue P status, but to differing extents (inorganic-P > nucleic acid-P > lipid-P > ester-P), suggesting that all P fractions (particularly inorganic P) serve, in part, a storage function. Both barleygrass and barley without endosperm had higher concentrations of all P fractions (particularly inorganic P) than did unaltered barley, but this was due entirely to their higher P status (due to slow growth) rather than to any major difference in P metabolism bet... Mostrar Tudo |
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Palavras-Chave: |
Hordeum leporinum; Nutrient adaptation; Phosphorus chemistry. |
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Thesagro: |
Cevada; Fósforo; Hordeum Vulgare. |
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Categoria do assunto: |
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Marc: |
LEADER 02410naa a2200205 a 4500
001 1838464
005 2011-10-17
008 1982 bl --- 0-- u #d
100 1 $aCHAPIN, F. S.
245 $aMild phosphorus stress in barley and a related low-phosphorus-adapted barleygrass$bphosphorus fractions and phosphate absorption in relation to growth.
260 $c1982
520 $aBarleygrass (Hordeum leporinum) from Australian low-P (phosphorus) soils and commercial barley (H. vulgare) with high fertilizer requirements were grown in solution culture at 3 levels of P supply. The high-P-adapted barley produced more biomass at all levels of P supply and was more responsive to added P in terms of rate of tillering, rate of leaf production, final leaf size, and therefore total shoot weight compared to barleygrass. In both species root: shoot ratio decreased in response to improved tissue P status, even at P levels where total biomass did not respond to P supply. Removal of endosperm reserves of barley reduced total biomass to a greater extent than it altered phosphate absorption rate, thus increasing tissue P status and making plants less responsive to added P. Similarly, barleygrass had a slower growth rate but a comparable P absorption rate to that of barley. Thus barleygrass also accumulated tissue P and was unresponsive to added P. All phosphorus chemical fractions increased in response to improved tissue P status, but to differing extents (inorganic-P > nucleic acid-P > lipid-P > ester-P), suggesting that all P fractions (particularly inorganic P) serve, in part, a storage function. Both barleygrass and barley without endosperm had higher concentrations of all P fractions (particularly inorganic P) than did unaltered barley, but this was due entirely to their higher P status (due to slow growth) rather than to any major difference in P metabolism between species. We conclude that slow growth is more important than interspecific differences in P metabolism, P absorption, or efficiency of P utilization in explaining the success of barleygrass and other low-P-adapted species on infertile soils.
650 $aCevada
650 $aFósforo
650 $aHordeum Vulgare
653 $aHordeum leporinum
653 $aNutrient adaptation
653 $aPhosphorus chemistry
700 1 $aBIELESKI, R. L.
773 $tPhysiologia Plantarum, Copenhagen$gv. 54, n. 3, p. 309-317, 1982.
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Registro original: |
Embrapa Trigo (CNPT) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Soja. |
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Data corrente: |
11/09/2008 |
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Data da última atualização: |
28/01/2009 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
FARIAS NETO, A. L.; SOUZA, P. I. M.; MOREIRA. C. T.; ABUD, S.; SILVA, N. S.; MONTEIRO, P. M. F. O.; NEIVA, L. C. S.; ALMEIDA, A. M. R.; DIAS, W. P.; SOARES, R. M.; NUNES, M. R.; VIEIRA, N. E.; SILVA, L. O.; TOLEDO, R. M. C. P.; NUNES JÚNIOR, J.; ARANTES, N. E.; BROGIN, R.; MELLO FILHO, O. L.; ARIAS, C. A. A.; TOLEDO, J. F. F; CARNEIRO, G. E. de S.; KASTER, M.; PÍPOLO, A. E.; MOREIRA, J. U. V.; OLIVEIRA, M. F.; CARRÃO-PANIZZI, M. C.; ABDELNOOR, R. V.; ALMEIDA, L. A. |
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Afiliação: |
Austeclínio Lopes de Farias Neto, CPAC; Plínio Itamar de Melo de Souza, CPAC; Claudete Teixeira Moreira, CPAC; Sergio Abud da Silva, CPAC; N. S. Silva, CPAC; Pedro Manuel Figueira de Oliveira Monteiro, Agência Rural; Luiz Carlos da Silva Neiva, AgenciaRural; Alvaro Manoel Rodrigues Almeida, CNPSo; Waldir Pereira Dias, CNPSo; Rafael Moreira Soares, CNPSo; Marcos Rogério Nunes, AgenciaRural; Nerivaldo E. Vieira, CTPA; Leandro Oliveira e Silva, AgenciaRural; Regina Maria de Cesare Parmezan Toledo, AgenciaRural/GO; José Nunes Junior, CTPA; Neylson Eustáquio Arantes, CNPSo; Rodrigo Luis Brogin, CNPSo; Odilon Lemos de Mello Filho, CNPSo; Carlos Alberto Arrabal Arias, CNPSo; José Francisco Ferraz de Toledo, CNPSo; Geraldo Estevam de Souza Carneiro, CNPSo; Milton Kaster, CNPSo; Antonio Eduardo Pípolo, CNPSo; José Ubirajara Vieira Moreira, CNPSo; Marcelo Fernandes de Oliveira, CNPSo; Mercedes Concórdia Carrão-Panizzi, CNPSo; Ricardo Vilela Abdelnoor, CNPSo; Leones Alves de Almeida, CNPSo. |
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Título: |
Cultivar de soja BRS 8160RR: indicação para o estado de Minas Gerais. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: REUNIÃO DE PESQUISA DE SOJA DA REGIÃO CENTRAL DO BRASIL, 30., 2008, Rio Verde. Resumos... Londrina: Embrapa Soja, 2008. p. 224-225. |
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Série: |
(Embrapa Soja. Documentos, 304). |
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Idioma: |
Português |
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Palavras-Chave: |
Soybean. |
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Thesagro: |
Soja; Variedade. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01399naa a2200481 a 4500
001 1571488
005 2009-01-28
008 2008 bl uuuu u00u1 u #d
100 1 $aFARIAS NETO, A. L.
245 $aCultivar de soja BRS 8160RR$bindicação para o estado de Minas Gerais.
260 $c2008
490 $a(Embrapa Soja. Documentos, 304).
650 $aSoja
650 $aVariedade
653 $aSoybean
700 1 $aSOUZA, P. I. M.
700 1 $aMOREIRA. C. T.
700 1 $aABUD, S.
700 1 $aSILVA, N. S.
700 1 $aMONTEIRO, P. M. F. O.
700 1 $aNEIVA, L. C. S.
700 1 $aALMEIDA, A. M. R.
700 1 $aDIAS, W. P.
700 1 $aSOARES, R. M.
700 1 $aNUNES, M. R.
700 1 $aVIEIRA, N. E.
700 1 $aSILVA, L. O.
700 1 $aTOLEDO, R. M. C. P.
700 1 $aNUNES JÚNIOR, J.
700 1 $aARANTES, N. E.
700 1 $aBROGIN, R.
700 1 $aMELLO FILHO, O. L.
700 1 $aARIAS, C. A. A.
700 1 $aTOLEDO, J. F. F
700 1 $aCARNEIRO, G. E. de S.
700 1 $aKASTER, M.
700 1 $aPÍPOLO, A. E.
700 1 $aMOREIRA, J. U. V.
700 1 $aOLIVEIRA, M. F.
700 1 $aCARRÃO-PANIZZI, M. C.
700 1 $aABDELNOOR, R. V.
700 1 $aALMEIDA, L. A.
773 $tIn: REUNIÃO DE PESQUISA DE SOJA DA REGIÃO CENTRAL DO BRASIL, 30., 2008, Rio Verde. Resumos... Londrina: Embrapa Soja, 2008. p. 224-225.
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