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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Trigo. |
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Data corrente: |
27/06/1995 |
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Data da última atualização: |
27/06/1995 |
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Autoria: |
LINDGREN, D. T.; GABELMAN, W. H.; GERLOFF, G. C. |
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Título: |
Variability of phosphorus uptake and translocation in Phaseolus vulgaris L. under phosphorus stress. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
J. Amer. Soc. Hort. Sci., v.102, n.5, p.674-677, 1977. |
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Idioma: |
Inglês
Português |
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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 |
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Palavras-Chave: |
DISTRIBUICAO DE NUTRIENTE; EFICIENCIA; Feijoeiro comum; FOSFATO SOLUVEL; GENOTIPO DA PLANTA; LEGUMINOSA DE GRAO; Melhoramento genetico; NUTRICAO MINERAL; VASO. |
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Thesagro: |
Dicotiledónea; Feijão; Fósforo; Genética; Leguminosa; Melhoramento; Método; Planta; Raiz; Solução Nutritiva. |
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Categoria do assunto: |
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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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