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 | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
06/11/2003 |
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Data da última atualização: |
08/09/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTOS, M. A.; VARGAS, M. A. T.; HUNGRIA, M. |
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Afiliação: |
MARIANGELA HUNGRIA DA CUNHA, CNPSO. |
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Título: |
Characterization of soybean Bradyrhizobium strains adapted to the Brazilian savannas. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
FEMS Microbiology Ecology, v. 30, n. 3, p. 261-272, Nov. 1999. |
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Idioma: |
Inglês |
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Conteúdo: |
Brazilian soils are originally free from soybean bradyrhizobia and the first inoculants were brought to the country in this century, but a search for adapted strains started immediately and still continues. A strain selection program was established at Embrapa based on the reisolation of strains after a long period of adaptation to the soils followed by a search for variant genotypes with higher N2 fixation capacity and competitiveness. A second approach of this program consists of searching for variant colonies of a single strain with higher N2 fixation rates and competitiveness, following a short period of adaptation to the soil. In this study, using both approaches, strains belonging to three serogroups, CB 1809, 532C and SEMIA 5020, were obtained. In general, the variant strains showed differences in colony morphology (mucoidy) but produced similar protein and lipopolysaccharide profiles. Within serogroup CB 1809, containing variants obtained via the second approach, a low level of DNA polymorphism was detected relative to the parental genotype by ERIC and REP-PCR. However, within the two other serogroups, containing variant strains obtained via the first approach, a high level of polymorphism in ERIC and REP-PCR fingerprints was observed relative to the putative serologically related parental genotypes. These results show that a great variability can be detected following adaptation of Bradyrhizobium strains to the soil, although other potential explanations for the DNA polymorphisms observed are discussed. Some of the variant strains obtained by both methodologies were found to have higher rates of N2 fixation and almost all were more competitive than the parental genotypes, suggesting that it is possible to select variant strains which can contribute to an improved plant N nutrition status. MenosBrazilian soils are originally free from soybean bradyrhizobia and the first inoculants were brought to the country in this century, but a search for adapted strains started immediately and still continues. A strain selection program was established at Embrapa based on the reisolation of strains after a long period of adaptation to the soils followed by a search for variant genotypes with higher N2 fixation capacity and competitiveness. A second approach of this program consists of searching for variant colonies of a single strain with higher N2 fixation rates and competitiveness, following a short period of adaptation to the soil. In this study, using both approaches, strains belonging to three serogroups, CB 1809, 532C and SEMIA 5020, were obtained. In general, the variant strains showed differences in colony morphology (mucoidy) but produced similar protein and lipopolysaccharide profiles. Within serogroup CB 1809, containing variants obtained via the second approach, a low level of DNA polymorphism was detected relative to the parental genotype by ERIC and REP-PCR. However, within the two other serogroups, containing variant strains obtained via the first approach, a high level of polymorphism in ERIC and REP-PCR fingerprints was observed relative to the putative serologically related parental genotypes. These results show that a great variability can be detected following adaptation of Bradyrhizobium strains to the soil, although other potential explanations for the DNA... Mostrar Tudo |
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Thesagro: |
Fixação de Nitrogênio; Nodulação; Soja. |
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Thesaurus Nal: |
Nitrogen fixation; Nodulation; Soybeans. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02459naa a2200217 a 4500
001 1465856
005 2023-09-08
008 1999 bl uuuu u00u1 u #d
100 1 $aSANTOS, M. A.
245 $aCharacterization of soybean Bradyrhizobium strains adapted to the Brazilian savannas.$h[electronic resource]
260 $c1999
520 $aBrazilian soils are originally free from soybean bradyrhizobia and the first inoculants were brought to the country in this century, but a search for adapted strains started immediately and still continues. A strain selection program was established at Embrapa based on the reisolation of strains after a long period of adaptation to the soils followed by a search for variant genotypes with higher N2 fixation capacity and competitiveness. A second approach of this program consists of searching for variant colonies of a single strain with higher N2 fixation rates and competitiveness, following a short period of adaptation to the soil. In this study, using both approaches, strains belonging to three serogroups, CB 1809, 532C and SEMIA 5020, were obtained. In general, the variant strains showed differences in colony morphology (mucoidy) but produced similar protein and lipopolysaccharide profiles. Within serogroup CB 1809, containing variants obtained via the second approach, a low level of DNA polymorphism was detected relative to the parental genotype by ERIC and REP-PCR. However, within the two other serogroups, containing variant strains obtained via the first approach, a high level of polymorphism in ERIC and REP-PCR fingerprints was observed relative to the putative serologically related parental genotypes. These results show that a great variability can be detected following adaptation of Bradyrhizobium strains to the soil, although other potential explanations for the DNA polymorphisms observed are discussed. Some of the variant strains obtained by both methodologies were found to have higher rates of N2 fixation and almost all were more competitive than the parental genotypes, suggesting that it is possible to select variant strains which can contribute to an improved plant N nutrition status.
650 $aNitrogen fixation
650 $aNodulation
650 $aSoybeans
650 $aFixação de Nitrogênio
650 $aNodulação
650 $aSoja
700 1 $aVARGAS, M. A. T.
700 1 $aHUNGRIA, M.
773 $tFEMS Microbiology Ecology$gv. 30, n. 3, p. 261-272, Nov. 1999.
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Registro original: |
Embrapa Soja (CNPSO) |
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| Registros recuperados : 125 | |
| 3. |  | SILVA, R. B.; CRUZ, I.; PENTEADO-DIAS, A. M. First report of Dolichozele koebelei Viereck, 1911 (Hymenoptera: Braconidae) on larvae of Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) in maize (Zea mays L.) under different cropping systems. Brazilian Journal of Biology, São Carlos, v. 74, n. 3, p. S218-S222, 2014. Suplemento.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 1 |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 5. | | DIAS, A. M.; SILVA, R. F. da; MERCANTE, F. M. Caracterização da macrofauna invertebrada do solo sob diferentes fitofisionomias do Pantanal. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 27.; REUNIÃO BRASILEIRA SOBRE MICORRIZAS, 11.; SIMPÓSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 9.; REUNIÃO BRASILEIRA DE BIOLOGIA DO SOLO, 6., 2006, Bonito, MS. A busca das raízes: anais. Dourados: Embrapa Agropecuária Oeste, 2006. (Embrapa Agropecuária Oeste. Documentos, 82). 1 CD-ROM. FERTBIO.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Agropecuária Oeste. |
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| 10. | | SILVA, E. N. da; SANTOS, R. S.; PENTEADO-DIAS, A. M. M.; ONODY, H. C. Levantamento de himenópteros parasitoides na agricultura Kaxinawá de Nova Olinda, Feijó, AC. In: CONGRESSO REGIONAL DE PESQUISA DO ESTADO DO ACRE, 2.; SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA UFAC, 25., 2016, Rio Branco/Cruzeiro do Sul. Inovação: sustentabilidade e desenvolvimento regional: anais. Rio Branco, AC: Edufac, 2016. p. 135.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Acre. |
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| 11. | | SILVA, V. V. L. da; SANTOS, R. S.; PENTEADO-DIAS, A. M. M. Levantamento de himenópteros parasitoides na Terra Indígena Puyanawa, Mâncio Lima, Acre, Brasil, com utilização de armadilha Malaise. In: SEMINÁRIO DA EMBRAPA ACRE DE INICIAÇÃO CIENTÍFICA E PÓS-GRADUAÇÃO, 6., 2023, Rio Branco, AC. Sistemas agroalimentares sustentáveis e o futuro da Amazônia: anais. Rio Branco, AC: Embrapa Acre, 2024. p. Apresentação oral. (Embrapa Acre. Eventos técnicos & científicos, 6). Coordenador: Jacson Rondinelli da Silva Negreiros.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Acre. |
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| 12. | | PENTEADO-DIAS, A. M.; FIGUEIREDO, M. L. C.; DIAS, M. M.; OSORIO, T. C.; CRUZ, I. First host records for Exasticolus fuscicornis (Cameron, 1887) (Hymenoptera: Braconidae: Homolobinae). Zoologische Mededelingen, Leiden, v. 80/81, n. 8, p. 109-111, 2006.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 14. | | MOREIRA, M. A. B.; ZARBIN, P. H. G.; PENTEADO-DIAS, A. M.; MACEDO, L. P. M. Descrição do comportamento de oviposição de Cervellus piranga (Hymenoptera: braconidade) sobre larvas da broca-do-mamoeiro, Pseudopiazurus obesus (Coleoptera: curculionidade), em condições de campo. In: ENCONTRO BRASILEIRO DE ECOLOGIA QUÍMICA, 5., 2007, Londrina. Resumos... Londrina: Embrapa Soja, 2007.| Tipo: Resumo em Anais de Congresso | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| 17. | | FIGUEIREDO, M. L. C.; CRUZ, I.; SILVA, R. B.; PENTEADO-DIAS, A. M. Distribuição espaço temporal de parasitóides de Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae) em áreas de produção de milho (Zea mays) orgânico sozinho ou consorciado com feijão (Phaseolus vulgaris, L.). In: CONGRESSO DE ECOLOGIA DO BRASIL, 9.; CONGRESSO LATINO AMERICANO DE ECOLOGIA, 3., 2009, São Lourenço. Ecologia e o futuro da biosfera: anais. São Paulo: SEB: Instituto de Biociências, 2009. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 18. | | HERRERA, G. do N.; SANTOS, R. S.; DIAS, A. M. P. M.; HIGA, P. T. Diversidade de Ichneumonidae em ambientes de mata nativa e lavoura de mandioca na Amazônia Ocidental, Acre, Brasil. In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 29.; CONGRESSO LATINO-AMERICANO DE ENTOMOLOGIA, 13., 2024, Uberlândia, MG. Sustentabilidade e biodiversidade de insetos: anais [...]. Viçosa: UFV, 2024. p. 244.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Acre. |
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| 20. | | QUERINO, R. B.; COUCEIRO, S. R. M.; QUEIROZ, L. O.; PENTEADO-DIAS, A. M. The spatial distribution of Hymenoptera parasitoids in a forest reserve in Central Amazonia, Manaus, AM, Brazil. Brazilian Journal of Biology, São Carlos, v. 71, n. 4, p. 865-871, nov. 2011. Autoria: QUERINO, R. B. [i.e. SILVA, R. B. Q. da]. RANYSE BARBOSA QUERINO DA SILVA.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 1 |
| Biblioteca(s): Embrapa Meio-Norte. |
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| Registros recuperados : 125 | |
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