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Registro Completo |
Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Trigo. |
Data corrente: |
27/06/1995 |
Data da última atualização: |
27/06/1995 |
Autoria: |
LINDGREN, D. T.; GABELMAN, W. H.; GERLOFF, G. C. |
Título: |
Variability of phosphorus uptake and translocation in Phaseolus vulgaris L. under phosphorus stress. |
Ano de publicação: |
1977 |
Fonte/Imprenta: |
J. Amer. Soc. Hort. Sci., v.102, n.5, p.674-677, 1977. |
Idioma: |
Inglês Português |
Conteúdo: |
Excised roots were used for evaluating methods and in identifying differences in rates of P absorption by 59 lines of Phaseolus vulgaris. Large variations in P absorption rates between lines were noted. Although the P absorption rate was negatively correlated with root dry weight, it was possible to isolate lines with similar excised root dry weights which displayed large differences in P absorption rates. Rates of P absorption by the terminal 3.5 cm root segment satisfactorily expressed P absorption by other portions of the root system. The rate of P absorption by excised roots was influenced by the amount of P in the solution in which plants were cultured prior to root excision. As the pretreatment P level increased from 3 to 31 mg/plant, P absorption by excised roots decreased and as the P level increased from 31 to 62 mg/plant, P absorption by excised roots leveled off. Rates of P absorption by excised roots also varied with the age of the plant. However, relative values between efficient and inefficient lines remained constant at each plant age. Variance for P absorption by excised roots due to environment was high. Narrow sense heritability estimates derived from parent offspring regression in families of efficient x inefficient lines were estimated to be about 40%. Data on P uptake by excised roots did not predict P uptake and translocation in intact plants. A realible standardized technique for intact plant ion absorption studies is necessary to make accurate comparisons between plants. MenosExcised roots were used for evaluating methods and in identifying differences in rates of P absorption by 59 lines of Phaseolus vulgaris. Large variations in P absorption rates between lines were noted. Although the P absorption rate was negatively correlated with root dry weight, it was possible to isolate lines with similar excised root dry weights which displayed large differences in P absorption rates. Rates of P absorption by the terminal 3.5 cm root segment satisfactorily expressed P absorption by other portions of the root system. The rate of P absorption by excised roots was influenced by the amount of P in the solution in which plants were cultured prior to root excision. As the pretreatment P level increased from 3 to 31 mg/plant, P absorption by excised roots decreased and as the P level increased from 31 to 62 mg/plant, P absorption by excised roots leveled off. Rates of P absorption by excised roots also varied with the age of the plant. However, relative values between efficient and inefficient lines remained constant at each plant age. Variance for P absorption by excised roots due to environment was high. Narrow sense heritability estimates derived from parent offspring regression in families of efficient x inefficient lines were estimated to be about 40%. Data on P uptake by excised roots did not predict P uptake and translocation in intact plants. A realible standardized technique for intact plant ion absorption studies is necessary to make accurate compari... Mostrar Tudo |
Palavras-Chave: |
DISTRIBUICAO DE NUTRIENTE; EFICIENCIA; Feijoeiro comum; FOSFATO SOLUVEL; GENOTIPO DA PLANTA; LEGUMINOSA DE GRAO; Melhoramento genetico; NUTRICAO MINERAL; VASO. |
Thesagro: |
Dicotiledónea; Feijão; Fósforo; Genética; Leguminosa; Melhoramento; Método; Planta; Raiz; Solução Nutritiva. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02523naa a2200373 a 4500 001 1612009 005 1995-06-27 008 1977 bl --- 0-- u #d 100 1 $aLINDGREN, D. T. 245 $aVariability of phosphorus uptake and translocation in Phaseolus vulgaris L. under phosphorus stress. 260 $c1977 520 $aExcised roots were used for evaluating methods and in identifying differences in rates of P absorption by 59 lines of Phaseolus vulgaris. Large variations in P absorption rates between lines were noted. Although the P absorption rate was negatively correlated with root dry weight, it was possible to isolate lines with similar excised root dry weights which displayed large differences in P absorption rates. Rates of P absorption by the terminal 3.5 cm root segment satisfactorily expressed P absorption by other portions of the root system. The rate of P absorption by excised roots was influenced by the amount of P in the solution in which plants were cultured prior to root excision. As the pretreatment P level increased from 3 to 31 mg/plant, P absorption by excised roots decreased and as the P level increased from 31 to 62 mg/plant, P absorption by excised roots leveled off. Rates of P absorption by excised roots also varied with the age of the plant. However, relative values between efficient and inefficient lines remained constant at each plant age. Variance for P absorption by excised roots due to environment was high. Narrow sense heritability estimates derived from parent offspring regression in families of efficient x inefficient lines were estimated to be about 40%. Data on P uptake by excised roots did not predict P uptake and translocation in intact plants. A realible standardized technique for intact plant ion absorption studies is necessary to make accurate comparisons between plants. 650 $aDicotiledónea 650 $aFeijão 650 $aFósforo 650 $aGenética 650 $aLeguminosa 650 $aMelhoramento 650 $aMétodo 650 $aPlanta 650 $aRaiz 650 $aSolução Nutritiva 653 $aDISTRIBUICAO DE NUTRIENTE 653 $aEFICIENCIA 653 $aFeijoeiro comum 653 $aFOSFATO SOLUVEL 653 $aGENOTIPO DA PLANTA 653 $aLEGUMINOSA DE GRAO 653 $aMelhoramento genetico 653 $aNUTRICAO MINERAL 653 $aVASO 700 1 $aGABELMAN, W. H. 700 1 $aGERLOFF, G. C. 773 $tJ. Amer. Soc. Hort. Sci.$gv.102, n.5, p.674-677, 1977.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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8. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | GIGLIOTI, J. P.; VINHOLIS, M. de M. B.; SANTOS, P. M.; NICIURA, S. C. M.; ZAFALON, L. F.; ALENCAR, S. B. de. Indicadores de produção científica por área e por subárea no Diretório dos Grupos de Pesquisa do CNPq. In: SIMPÓSIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA PECUÁRIA SUDESTE, 2., 2007, São Carlos, SP. Anais... São Carlos: Embrapa Pecuária Sudeste, 2007. (Embrapa Pecuária Sudeste. Documentos, 76).Tipo: Resumo em Anais de Congresso |
Biblioteca(s): Embrapa Pecuária Sudeste. |
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Biblioteca(s): Embrapa Algodão. |
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