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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
07/02/1997 |
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Data da última atualização: |
07/02/1997 |
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Autoria: |
SANTOS, V. A. F.; NEVES, M. C. P.; RUMJANEK, N. G. |
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Título: |
Efficiency of soybean nodules related to rhizobia hydrogenase is influenced by light level. |
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Ano de publicação: |
1996 |
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Fonte/Imprenta: |
Revista Brasileira de Fisiologia Vegetal, Brasilia, v. 8, n. 1, p. 15-21, 1996. |
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Idioma: |
Inglês |
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Conteúdo: |
The relationship between hydrogen metabolism, nitrogen assimilation and transport was studied in Glycine max L. cv. Doko inoculated with mutants Hup+ (PJ17-1) or Hup- (PJ17) of strain USDA DES 122 of Bradyrhizobium japonicum. Plants were submitted to normal sunlight or to 30% full sunlight and harvested at full flowering. No difference was observed in the control treatment (normal sunlight) between plants inoculated with any of the two mutants. When submitted to shadding, plants inoculated with the Hup+ mutant showed a decrease in nodule and shoot dry matter, and in total shoot nitrogen, whereas plants inoculated with the Hup- mutant were not significantly affected by shadding. An increase was observed in the activity of enzymes related to both nitrogen assi milation and ureide synthesis when plants were submitted to shadding. Nodules formed by the Hup- mutant also showed an increase in the relative efficiency due to shadding, and this was closely followed by the ratio of ureide-N/total-N transported by the sap. Both parameters remained essentially constant for the Hup+ nodules, independently of light treatment. The increase in most observed parameters may explain why plants inoculated with the Hup- mutant were able to compensate for the decrease in total light intensity, resulting in growth rates similar to the control plants. Cultivation of soybean under reduced total light intensity, as in greenhouse or phytotron studies, is likely to show a lack of significant strain effect on sap composition and total... MenosThe relationship between hydrogen metabolism, nitrogen assimilation and transport was studied in Glycine max L. cv. Doko inoculated with mutants Hup+ (PJ17-1) or Hup- (PJ17) of strain USDA DES 122 of Bradyrhizobium japonicum. Plants were submitted to normal sunlight or to 30% full sunlight and harvested at full flowering. No difference was observed in the control treatment (normal sunlight) between plants inoculated with any of the two mutants. When submitted to shadding, plants inoculated with the Hup+ mutant showed a decrease in nodule and shoot dry matter, and in total shoot nitrogen, whereas plants inoculated with the Hup- mutant were not significantly affected by shadding. An increase was observed in the activity of enzymes related to both nitrogen assi milation and ureide synthesis when plants were submitted to shadding. Nodules formed by the Hup- mutant also showed an increase in the relative efficiency due to shadding, and this was closely followed by the ratio of ureide-N/total-N transported by the sap. Both parameters remained essentially constant for the Hup+ nodules, independently of light treatment. The increase in most observed parameters may explain why plants inoculated with the Hup- mutant were able to compensate for the decrease in total light intensity, resulting in growth rates similar to the control plants. Cultivation of soybean under reduced total light intensity, as in greenhouse or phytotron studies, is likely to show a lack of significant strain ef... Mostrar Tudo |
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Thesagro: |
Bradyrhizobium Japonicum; Glycine Max; Soja. |
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Thesaurus Nal: |
soybeans. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02111naa a2200193 a 4500
001 1620906
005 1997-02-07
008 1996 bl uuuu u00u1 u #d
100 1 $aSANTOS, V. A. F.
245 $aEfficiency of soybean nodules related to rhizobia hydrogenase is influenced by light level.
260 $c1996
520 $aThe relationship between hydrogen metabolism, nitrogen assimilation and transport was studied in Glycine max L. cv. Doko inoculated with mutants Hup+ (PJ17-1) or Hup- (PJ17) of strain USDA DES 122 of Bradyrhizobium japonicum. Plants were submitted to normal sunlight or to 30% full sunlight and harvested at full flowering. No difference was observed in the control treatment (normal sunlight) between plants inoculated with any of the two mutants. When submitted to shadding, plants inoculated with the Hup+ mutant showed a decrease in nodule and shoot dry matter, and in total shoot nitrogen, whereas plants inoculated with the Hup- mutant were not significantly affected by shadding. An increase was observed in the activity of enzymes related to both nitrogen assi milation and ureide synthesis when plants were submitted to shadding. Nodules formed by the Hup- mutant also showed an increase in the relative efficiency due to shadding, and this was closely followed by the ratio of ureide-N/total-N transported by the sap. Both parameters remained essentially constant for the Hup+ nodules, independently of light treatment. The increase in most observed parameters may explain why plants inoculated with the Hup- mutant were able to compensate for the decrease in total light intensity, resulting in growth rates similar to the control plants. Cultivation of soybean under reduced total light intensity, as in greenhouse or phytotron studies, is likely to show a lack of significant strain effect on sap composition and total...
650 $asoybeans
650 $aBradyrhizobium Japonicum
650 $aGlycine Max
650 $aSoja
700 1 $aNEVES, M. C. P.
700 1 $aRUMJANEK, N. G.
773 $tRevista Brasileira de Fisiologia Vegetal, Brasilia$gv. 8, n. 1, p. 15-21, 1996.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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| 1. |  | HENNING, A. A.; COSTA VAL, W. M.; FRANCA NETO, J. B.; KRZYZANOWSKI, F. C.; COSTA, N. P.; COSTAMILAN, L. M.; BONATO, E. R.; DEL PIVA, C. A.; CAMARGO, T. V.; YUYAMA, M. M.; GARRIDO, R. B. O.; FRANCOVIG, P. C. Tratamento de sementes de soja com fungicidas: resultados da rede de ensaios da safra 1998/99. In: REUNIAO DE PESQUISA DE SOJA DA REGIAO CENTRAL DO BRASIL, 22., 2000, Cuiaba. Resumos... Londrina: Embrapa Soja, 2000. p.202-203. (Embrapa Soja. Documentos, 144).| Biblioteca(s): Embrapa Soja. |
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