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| Registros recuperados : 368 | |
| 42. |  | VELOSO, C. A. C.; KATO, A. K.; COUTO, W. S. Concentração e quantidade de N, P, K, Ca e Mg nos diversos orgãos da pimenta-do-reino (Piper nigrum, L.). Belém, PA: EMBRAPA-UEPAE de Belém, 1987. 8 p. (EMBRAPA-UEPAE de Belém. Pesquisa em andamento, 3).| Biblioteca(s): Embrapa Agroindústria Tropical; Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Amazônia Oriental; Embrapa Unidades Centrais. |
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| 45. | | SALES, A.; VELOSO, C. A. C.; SILVA, A. R. Dinâmica de sistemas de integração lavoura-pecuária-floresta nos atributos físicos de um latossolo amarelo. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA, 19.; SEMINÁRIO DE PÓS-GRADUAÇÃO DA EMBRAPA AMAZÔNIA ORIENTAL, 3., 2015, Belém, PA. Anais. Belém, PA: Embrapa Amazônia Oriental, 2015. p. 14-18.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 49. | | VELOSO, C. A. C.; MURAOKA, T.; MALAVOLTA, E. Influência do alumínio sobre o crescimento e composição mineral da pimenteira-do-reino (Piper nigrum). IN: CONGRESSO BRASILEIRO DE CIÊNÇIA DO SOLO, 25., 1995, Viçosa, MG. Resumos expandidos. Viçosa: UFV, 1995, v.2, p. 1061-1063.| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| 54. | | BATISTA, R. J. da R.; VELOSO, C. A. C. Resposta da aceroleira aos nutrientes nitrogênio, fósforo e potássio em latossolo amarelo do município de Castanhal-PA. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA FCAP, 12.; SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 6., 2002, Belém, PA. A contribuição do profissional de Ciências Agrárias no uso e conservação da biodiversidade: anais. Belém, PA: FCAP: Embrapa Amazônia Oriental, 2002.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 55. | | SENA, W. de L.; VELOSO, C. A. C. Resposta da aceroleira aos nutrientes N, P, K, em um latossolo amarelo de castanhal, Pará. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 17., 2002, Belém, PA. Anais. Belém: SBF, 2002. 3 f. Publicado também: FRAZÃO, D. A. C.; HOMMA, A. K. O; VIÉGAS, I. de J. M. (Ed.). Contribuição ao desenvolvimento da fruticultura na Amazônia. Belém, PA: Embrapa Amazônia Oriental, 2006. p. 121-125.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 56. | | VELOSO, C. A. C.; MUNIZ, A. C. M. Resposta da laranjeira-pêra aos nutrientes N, P, K em Latossolo Amarelo no nordeste paraense. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 17., 2002, Belém, PA. Anais. Belém: SBF, 2002. 4 f. Publicado também: FRAZÃO, D. A. C.; HOMMA, A. K. O; VIÉGAS, I. de J. M. (Ed.). Contribuição ao desenvolvimento da fruticultura na Amazônia. Belém, PA: Embrapa Amazônia Oriental, 2006. p. 279-284.| Biblioteca(s): Embrapa Amazônia Oriental. |
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
16/05/2007 |
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Data da última atualização: |
03/08/2017 |
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Autoria: |
HUNGRIA, M.; CHUEIRE, L. M. O.; MEGIÁS, M.; LAMRABET, Y.; PROBANZA, A.; GUTTIERREZ-MAÑERO, F. J.; CAMPO, R. J. |
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Título: |
Genetic diversity of indigenous tropical fast-growing rhizobia isolated from soybean nodules. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Plant and Soil, v. 288, n. 1/2, p. 343-356, Nov. 2006. |
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Idioma: |
Inglês |
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Conteúdo: |
This study characterized genetically 30 fast-growing rhizobial strains isolated from nodules of Asian and modern soybean genotypes that had been inoculated with soils from disparate regions of Brazil. Analyses by rep-PCR (ERIC and REP) and RAPD indicated a high level of genetic diversity among the strains. The RFLP-PCR and sequencing analysis of the 16S rRNA genes indicated that none of the strains was related to Sinorhizobium (Ensifer) fredii, whereas most were related to Rhizobium tropici (although they were unable to nodulate Phaseolus vulgaris) and to Rhizobium genomic species Q. One strain was related to Rhizobium sp. OR 191, while two others were closely related to Agrobacterium (Rhizobium) spp.; furthermore, symbiotic effectiveness with soybean was maintained in those strains. Five strains were related to Bradyrhizobium japonicum and B. elkanii, with four of them being similar to strains carried in Brazilian inoculants, therefore modifications in physiological properties, as a shorter doubling time might have resulted from adaptation to local conditions. Phospholipid fatty acid analysis (PFLA) was less precise in delineating taxonomic relationships. The strains fit into eight Nod-factor profiles that were related to rhizobial species, but not to N2-fixation capacity or competitiveness. The data obtained highlight the diversity and promiscuity of rhizobia in the tropics, being capable of nodulating exotic legumes and might reflect ecological strategies to survive in N-poor soils; in addition, the diversity could also represent an important source of efficient and competitive rhizobial strains for the tropics. Putative new rhizobial species were detected only in undisturbed soils. Three species (R. tropici, B. japonicum and B. elkanii) were found under the more sustainable management system known as no-till, while the only species isolated from soils under conventional till was R. tropici. Those results emphasize that from the moment that agriculture was introduced into undisturbed soils rhizobial diversity has changed, being drastically reduced when a less sustainable soil management system was adopted. MenosThis study characterized genetically 30 fast-growing rhizobial strains isolated from nodules of Asian and modern soybean genotypes that had been inoculated with soils from disparate regions of Brazil. Analyses by rep-PCR (ERIC and REP) and RAPD indicated a high level of genetic diversity among the strains. The RFLP-PCR and sequencing analysis of the 16S rRNA genes indicated that none of the strains was related to Sinorhizobium (Ensifer) fredii, whereas most were related to Rhizobium tropici (although they were unable to nodulate Phaseolus vulgaris) and to Rhizobium genomic species Q. One strain was related to Rhizobium sp. OR 191, while two others were closely related to Agrobacterium (Rhizobium) spp.; furthermore, symbiotic effectiveness with soybean was maintained in those strains. Five strains were related to Bradyrhizobium japonicum and B. elkanii, with four of them being similar to strains carried in Brazilian inoculants, therefore modifications in physiological properties, as a shorter doubling time might have resulted from adaptation to local conditions. Phospholipid fatty acid analysis (PFLA) was less precise in delineating taxonomic relationships. The strains fit into eight Nod-factor profiles that were related to rhizobial species, but not to N2-fixation capacity or competitiveness. The data obtained highlight the diversity and promiscuity of rhizobia in the tropics, being capable of nodulating exotic legumes and might reflect ecological strategies to survive in N-... Mostrar Tudo |
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Thesagro: |
Soja. |
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Categoria do assunto: |
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Marc: |
LEADER 02727naa a2200205 a 4500
001 1470003
005 2017-08-03
008 2006 bl --- 0-- u #d
100 1 $aHUNGRIA, M.
245 $aGenetic diversity of indigenous tropical fast-growing rhizobia isolated from soybean nodules.
260 $c2006
520 $aThis study characterized genetically 30 fast-growing rhizobial strains isolated from nodules of Asian and modern soybean genotypes that had been inoculated with soils from disparate regions of Brazil. Analyses by rep-PCR (ERIC and REP) and RAPD indicated a high level of genetic diversity among the strains. The RFLP-PCR and sequencing analysis of the 16S rRNA genes indicated that none of the strains was related to Sinorhizobium (Ensifer) fredii, whereas most were related to Rhizobium tropici (although they were unable to nodulate Phaseolus vulgaris) and to Rhizobium genomic species Q. One strain was related to Rhizobium sp. OR 191, while two others were closely related to Agrobacterium (Rhizobium) spp.; furthermore, symbiotic effectiveness with soybean was maintained in those strains. Five strains were related to Bradyrhizobium japonicum and B. elkanii, with four of them being similar to strains carried in Brazilian inoculants, therefore modifications in physiological properties, as a shorter doubling time might have resulted from adaptation to local conditions. Phospholipid fatty acid analysis (PFLA) was less precise in delineating taxonomic relationships. The strains fit into eight Nod-factor profiles that were related to rhizobial species, but not to N2-fixation capacity or competitiveness. The data obtained highlight the diversity and promiscuity of rhizobia in the tropics, being capable of nodulating exotic legumes and might reflect ecological strategies to survive in N-poor soils; in addition, the diversity could also represent an important source of efficient and competitive rhizobial strains for the tropics. Putative new rhizobial species were detected only in undisturbed soils. Three species (R. tropici, B. japonicum and B. elkanii) were found under the more sustainable management system known as no-till, while the only species isolated from soils under conventional till was R. tropici. Those results emphasize that from the moment that agriculture was introduced into undisturbed soils rhizobial diversity has changed, being drastically reduced when a less sustainable soil management system was adopted.
650 $aSoja
700 1 $aCHUEIRE, L. M. O.
700 1 $aMEGIÁS, M.
700 1 $aLAMRABET, Y.
700 1 $aPROBANZA, A.
700 1 $aGUTTIERREZ-MAÑERO, F. J.
700 1 $aCAMPO, R. J.
773 $tPlant and Soil$gv. 288, n. 1/2, p. 343-356, Nov. 2006.
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