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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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| Registros recuperados : 95 | |
| 24. |  | LUCIANO, R. V.; ALBUQUERQUE, J. A.; RUFATO, L.; MIQUELLUTI, D. J.; WARMLING, M. T. Condições meteorológicas e tipo de solo de solo na composição da uva 'Cabernet sauvignon'. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 48, n. 1, p. 97-104, jan. 2013. Título em inglês: Weather and soil effects on the composition of 'Cabernet Sauvignon' grape.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 25. | | LIMA, C. S. M.; VILANOVA, D. S.; GONÇALVES, M. A.; RUFATO, L.; RUFATO, A. de R. Diferentes substratos e recipientes na formação de mudas de Physalis peruviana L. In: SIMPÓSIO NACIONAL DO MORANGO, 5.; ENCONTRO SOBRE PEQUENAS FRUTAS E FRUTAS NATIVAS DO MERCOSUL, 4., 2010, Pelotas. Palestras e resumos... Pelotas: Embrapa Clima Temperado, 2010. p. 180. Resumo.| Tipo: Resumo em Anais de Congresso |
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| 32. | | BRIGHENTI, A. F.; WURZ, D. A.; PASA, M. da S.; RUFATO, L. Plant growth regulators to enhance fruit color of 'Gala' apples. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 52, n. 11, p. 1118-1122, nov. 2017. Notas Científicas.
Título em português: Fitorreguladores para o aumento da coloração de maçãs 'Gala'.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 33. | | SILVA, L. C. da; RUFATO, L.; KRETZSCHMAR, A. A.; MARCON FILHO, J. L. Raleio de cachos em vinhedos de altitude e qualidade do vinho da cultivar Syrah. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 44, n. 2, p. 148-154, fev. 2009. Título em inglês: Cluster thinning in high altitude vineyards and wine quality from the cultivar Syrah.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 34. | | CARMINATTI, J. F.; MICHELON, M. F.; SANDER, G. F.; RUFATO, A. de R.; RUFATO, L. Raleioquímico de macieiras "Maxigala"' com aplicação de metamitron em diferentes doses e épocas de aplicação. In.:ENCONTRO NACIONAL SOBRE FRUTICULTURA DE CLIMA TEMPERADO, 14., 2015, Fraiburgo, SC. Anais...(v.2 - Resumos). Caçador: Epagri, v. 2 (trabalhos), 2015. p. 49.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Uva e Vinho. |
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| 35. | | FAGHERAZZI, A. F.; COCCO, C.; ANTUNES, L. E. C.; FAEDI, W.; BARUZZI, G.; RUFATO, L. Novos genótipos de morangos italianos com potencial de cultivo no brasil. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 22., 2012, Bento Gonçalves. Anais... Bento Gonçalves: SBF, 2012.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Clima Temperado. |
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| Registros recuperados : 95 | |
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