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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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Registro original: |
Embrapa Soja (CNPSO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
13/11/1998 |
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Data da última atualização: |
31/08/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - B |
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Autoria: |
ARAUJO, G. G. L. de; SILVA, J. F. C. da; VALADARES FILHO, S. de C.; CAMPOS, O. F. de; SIGNORETTI, R. D.; TURCO, S. H. N. |
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Afiliação: |
GHERMAN GARCIA LEAL DE ARAUJO, CPATSA; JOSÉ FERNANDO COELHO DA SILVA, Professo da UFV; SEBASTIÃO DE CAMPOS VALADARES FILHO, Professor da UFV; ORIEL FAJARDO DE CAMPOS, CNPGL; RICARDO DIAS SIGNORETTI, Doutorando da UFV; SILVIA HELENA NOGUEIRA TURCO, Doutoranda da UFV. |
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Título: |
Composicao corporal e exigencias liquidas e dieteticas de macroelementos minerais de bezerros alimentados com dietas contendo diferentes niveis de volumoso. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Revista Brasileira de Zootecnia, Vicosa, MG, v. 27, n. 5, p. 1023-1030, 1998. |
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Idioma: |
Português |
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Conteúdo: |
O objetivo deste trabalho foi estudar os efeitos de diferentes niveis de volumoso nas dietas sobre as exigencias liquidas e dieteticas de calcio (Ca), fosforo (P), magnesio (Mg), sodio (Na) e potassio (k) de bezerros mesticos (Holandes x Zebu) em crescimento. Quarenta e oito bezeerros mesticos foram alimentados a vontade e distribuidos em cinco grupos de oito animais, de acordo com cada sistema de alimentacao (Tratamentos). Os seguintes niveis de volumoso nas dietas, na base da materia seca, foram usados: T1 = 10%; T2 = 25%; T3 = 40%; T4 = 55% e T5 = 90%. As deposicoes de calcio e magnesio para ganho de peso de corpo vazio (PCVZ) aumentaram, ao passo que as exigencias dieteticas de calcio e fosforo, praticamente, nao mudaram, a medida que o peso do animal aumentou de 60 para 300 Kg PV, para todos niveis de volumoso na dieta. As exigencias liquidas e dieteticas (g), estimadas pela equacao geral, para ganho de 1 Kg PCVZ, para bovinos com peso entre 60 a 300 Kg PV, variaram de 16,85 a 15,72 g para Ca; 8,51 a 8,56 g para P; 0,27 a 0,34 g para Mg; 0,89 a 1,24 g para Na; e 1,87 a 2,08 g para K e de 32,06 a 29,91 g para Ca; 16,50 a 16,39 g para P; 0,59 a 0,74 g para Mg; 0,95 a 1,32 g para Na; e 2,27 a 2,53 g para K, respectivamente. |
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Palavras-Chave: |
Composicao corporal; Feed; Mineral nutrition; Nutricao mineral; Roughage; Volumoso. |
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Thesagro: |
Bezerro; Cálcio; Fósforo; Magnésio; Potássio; Produção animal. |
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Thesaurus NAL: |
Animal production; body composition; calcium; calves; magnesium; phosphorus; potassium; sodium. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/182300/1/Rev.-Brasileira-de-Zootecnia-v.27-n.5-p.1023-1030-1998.pdf
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Marc: |
LEADER 02433naa a2200421 a 4500
001 1131514
005 2018-08-31
008 1998 bl uuuu u00u1 u #d
100 1 $aARAUJO, G. G. L. de
245 $aComposicao corporal e exigencias liquidas e dieteticas de macroelementos minerais de bezerros alimentados com dietas contendo diferentes niveis de volumoso.
260 $c1998
520 $aO objetivo deste trabalho foi estudar os efeitos de diferentes niveis de volumoso nas dietas sobre as exigencias liquidas e dieteticas de calcio (Ca), fosforo (P), magnesio (Mg), sodio (Na) e potassio (k) de bezerros mesticos (Holandes x Zebu) em crescimento. Quarenta e oito bezeerros mesticos foram alimentados a vontade e distribuidos em cinco grupos de oito animais, de acordo com cada sistema de alimentacao (Tratamentos). Os seguintes niveis de volumoso nas dietas, na base da materia seca, foram usados: T1 = 10%; T2 = 25%; T3 = 40%; T4 = 55% e T5 = 90%. As deposicoes de calcio e magnesio para ganho de peso de corpo vazio (PCVZ) aumentaram, ao passo que as exigencias dieteticas de calcio e fosforo, praticamente, nao mudaram, a medida que o peso do animal aumentou de 60 para 300 Kg PV, para todos niveis de volumoso na dieta. As exigencias liquidas e dieteticas (g), estimadas pela equacao geral, para ganho de 1 Kg PCVZ, para bovinos com peso entre 60 a 300 Kg PV, variaram de 16,85 a 15,72 g para Ca; 8,51 a 8,56 g para P; 0,27 a 0,34 g para Mg; 0,89 a 1,24 g para Na; e 1,87 a 2,08 g para K e de 32,06 a 29,91 g para Ca; 16,50 a 16,39 g para P; 0,59 a 0,74 g para Mg; 0,95 a 1,32 g para Na; e 2,27 a 2,53 g para K, respectivamente.
650 $aAnimal production
650 $abody composition
650 $acalcium
650 $acalves
650 $amagnesium
650 $aphosphorus
650 $apotassium
650 $asodium
650 $aBezerro
650 $aCálcio
650 $aFósforo
650 $aMagnésio
650 $aPotássio
650 $aProdução animal
653 $aComposicao corporal
653 $aFeed
653 $aMineral nutrition
653 $aNutricao mineral
653 $aRoughage
653 $aVolumoso
700 1 $aSILVA, J. F. C. da
700 1 $aVALADARES FILHO, S. de C.
700 1 $aCAMPOS, O. F. de
700 1 $aSIGNORETTI, R. D.
700 1 $aTURCO, S. H. N.
773 $tRevista Brasileira de Zootecnia, Vicosa, MG$gv. 27, n. 5, p. 1023-1030, 1998.
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