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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
02/09/1998 |
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Data da última atualização: |
02/09/1998 |
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Autoria: |
SCOTTI, M. R. M. M. L.; CARVALHO-SILVA, D.R.; VARGAS, M. A. T.; NEVES, M. C.; DOBEREINER, J. |
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Título: |
Changes in electrophoretic profiles of lipopolysaccharides from competitive strains of Bradyrhizobium spp. induced by soybean roots. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Journal of Applied Microbiology, London, v.83, p.552-560, 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
The soybean Bradyrhizobium strain Semia 566 was introduced into soils of the Cerrados (Brazilian edaphic savannas) in the late 1960s. Then, nodule occupancy by this strain was not greater than 2%. Recently, this serogroup has been found in approximately 60% of nodules formed on soybeans cultivated in the Cerrados, replacing the strains 29W and Semia 587, the Brazilian commercial inoculant for soybean. Although some re-isolates of Semia 566, adapted to Cerrado soils, were more competitive than 29W under both field and aseptic conditions, they did not differ from the parental strain, based on their lipopolysaccharide (LPS) electrophoretic profile. The only exceptions were the isolates 4A-5 and CPAC-15 which presented an additional polysaccharidic band of low molecular weight of higher mobility. On the other hand, this same band may be induced and intensified in LPS extracted from competitive strains (29W, 220, 204, 370, 372, 516, 122 and CPAC-15) after bacterial contact with soybean roots for 6 or 12 h. In addition, a 29W Tn5 mutant with a phenotype of delayed nodulation showed a delayed induction of this polysaccharidic band. Conversely, the LPS of less competitive strains was not modified or showed a weak intensification of this band. As this band alteration was correlated with the concurrent elevation of dominance in nodules, it may be suggested tha LPS plays a role in the competitive ability of rhizobia strains for nodulation. |
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Thesagro: |
Cerrado; Glycine Max; Soja. |
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Thesaurus Nal: |
Bradyrhizobium; soybeans. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02139naa a2200229 a 4500
001 1554404
005 1998-09-02
008 1997 bl --- 0-- u #d
100 1 $aSCOTTI, M. R. M. M. L.
245 $aChanges in electrophoretic profiles of lipopolysaccharides from competitive strains of Bradyrhizobium spp. induced by soybean roots.
260 $c1997
520 $aThe soybean Bradyrhizobium strain Semia 566 was introduced into soils of the Cerrados (Brazilian edaphic savannas) in the late 1960s. Then, nodule occupancy by this strain was not greater than 2%. Recently, this serogroup has been found in approximately 60% of nodules formed on soybeans cultivated in the Cerrados, replacing the strains 29W and Semia 587, the Brazilian commercial inoculant for soybean. Although some re-isolates of Semia 566, adapted to Cerrado soils, were more competitive than 29W under both field and aseptic conditions, they did not differ from the parental strain, based on their lipopolysaccharide (LPS) electrophoretic profile. The only exceptions were the isolates 4A-5 and CPAC-15 which presented an additional polysaccharidic band of low molecular weight of higher mobility. On the other hand, this same band may be induced and intensified in LPS extracted from competitive strains (29W, 220, 204, 370, 372, 516, 122 and CPAC-15) after bacterial contact with soybean roots for 6 or 12 h. In addition, a 29W Tn5 mutant with a phenotype of delayed nodulation showed a delayed induction of this polysaccharidic band. Conversely, the LPS of less competitive strains was not modified or showed a weak intensification of this band. As this band alteration was correlated with the concurrent elevation of dominance in nodules, it may be suggested tha LPS plays a role in the competitive ability of rhizobia strains for nodulation.
650 $aBradyrhizobium
650 $asoybeans
650 $aCerrado
650 $aGlycine Max
650 $aSoja
700 1 $aCARVALHO-SILVA, D.R.
700 1 $aVARGAS, M. A. T.
700 1 $aNEVES, M. C.
700 1 $aDOBEREINER, J.
773 $tJournal of Applied Microbiology, London$gv.83, p.552-560, 1997.
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Registro original: |
Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
20/04/2010 |
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Data da última atualização: |
20/04/2010 |
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Tipo da produção científica: |
Monitoramento/Zoneamento |
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Autoria: |
CAVALCANTI, A. C.; ARAUJO FILHO, J. C. de; SILVA, F. H. B. B. da; OLIVEIRA, S. B. P. de; TAVARES, S. C. C. de H.; CARVALHO, M. S. B. de S.; SILVA, D. F. da; SILVEIRA, H. L. F. da; BARRETO, R. N. da C. |
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Afiliação: |
Antonio Cabral Cavalcanti; JOSE COELHO DE ARAUJO FILHO, CNPS; FLAVIO HUGO BARRETO B DA SILVA, CNPS; Sonia Barreto Perdigão de Oliveira, FUNCEME; SELMA CAVALCANTI CRUZ DE H TAVARES, CNPS; Margareth Sílvia Benício de Souza Carvalho, FUNCEME; DAVI FERREIRA DA SILVA, CNPS; HILTON LUIS FERRAZ DA SILVEIRA, CNPS; Raimunda Neuma da Costa Barreto, FUNCEME. |
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Título: |
Zoneamento agroecológico da mesorregião do sul Cearense: mapa do potencial de terras para irrigação: folha Caririaçú. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
In: CAVALCANTI, A. C.; ARAUJO FILHO, J. C. de; SILVA, F. H. B. B. da; OLIVEIRA, S. B. P. de; TAVARES, S. C. C. de H.; CARVALHO, M. S. B. de S.; SILVA, D. F. da; SILVEIRA, H. L. F. da; BARRETO, R. N. da C. Avaliação do potencial de terras para irrigação da mesorregião do sul cearense: para compatibilizar com a disponibilidade dos recursos hídricos. Recife: Embrapa Solos, 2009. 28 p. |
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Páginas: |
1 p. |
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Descrição Física: |
mapa color.; escala 1: 75.000 |
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Idioma: |
Português |
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Palavras-Chave: |
Zoneamento agroecológico. |
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Thesagro: |
Irrigação. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01157nem a2200229 a 4500
001 1697111
005 2010-04-20
008 2009 bl uuuu u0uu1 u #d
100 1 $aCAVALCANTI, A. C.
245 $aZoneamento agroecológico da mesorregião do sul Cearense$bmapa do potencial de terras para irrigação: folha Caririaçú.$h[electronic resource]
260 $aIn: CAVALCANTI, A. C.; ARAUJO FILHO, J. C. de; SILVA, F. H. B. B. da; OLIVEIRA, S. B. P. de; TAVARES, S. C. C. de H.; CARVALHO, M. S. B. de S.; SILVA, D. F. da; SILVEIRA, H. L. F. da; BARRETO, R. N. da C. Avaliação do potencial de terras para irrigação da mesorregião do sul cearense: para compatibilizar com a disponibilidade dos recursos hídricos. Recife: Embrapa Solos, 2009. 28 p.$c2009
300 $a1 p.$cmapa color.; escala 1: 75.000
650 $aIrrigação
653 $aZoneamento agroecológico
700 1 $aARAUJO FILHO, J. C. de
700 1 $aSILVA, F. H. B. B. da
700 1 $aOLIVEIRA, S. B. P. de
700 1 $aTAVARES, S. C. C. de H.
700 1 $aCARVALHO, M. S. B. de S.
700 1 $aSILVA, D. F. da
700 1 $aSILVEIRA, H. L. F. da
700 1 $aBARRETO, R. N. da C.
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Embrapa Solos (CNPS) |
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