| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Soja. |
|
Data corrente: |
16/05/2007 |
|
Data da última atualização: |
21/10/2024 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
HUNGRIA, M.; CHUEIRE, L. M. de O.; MEGIÁS, M.; LAMRABET, Y.; PROBANZA, A.; GUTTIERREZ-MAÑERO, F. J.; CAMPO, R. J. |
|
Afiliação: |
MARIANGELA HUNGRIA DA CUNHA, CNPSO; LIGIA MARIA DE OLIVEIRA CHUEIRE, CNPSO; UNIVERSIDA SEVILLA; UNIVERSIDA SEVILLA; UNIVERSIDA SAN PABLO; UNIVERSIDA SAN PABLO; RUBENS JOSE CAMPO, CNPSO. |
|
Título: |
Genetic diversity of indigenous tropical fast-growing rhizobia isolated from soybean nodules. |
|
Ano de publicação: |
2006 |
|
Fonte/Imprenta: |
Plant and Soil, v. 288, n. 1/2, p. 343-356, Nov. 2006. |
|
DOI: |
10.1007/s11104-006-9125-0 |
|
Idioma: |
Inglês |
|
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 |
|
Thesagro: |
Estrutura do Solo; Soja. |
|
Thesaurus Nal: |
Soil management; Soybeans. |
|
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
|
Marc: |
LEADER 02891naa a2200253 a 4500
001 1470003
005 2024-10-21
008 2006 bl uuuu u00u1 u #d
024 7 $a10.1007/s11104-006-9125-0$2DOI
100 1 $aHUNGRIA, M.
245 $aGenetic diversity of indigenous tropical fast-growing rhizobia isolated from soybean nodules.$h[electronic resource]
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 $aSoil management
650 $aSoybeans
650 $aEstrutura do Solo
650 $aSoja
700 1 $aCHUEIRE, L. M. de 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.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Soja (CNPSO) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 1 | |
| 1. |  | GRAHAM, P. H.; ROSAS, J. C.; JENSEN, C. E. de; PERALTA, E.; TLUSTY, B.; ACOSTA-GALLEGOS, J.; PEREIRA, P. A. A. Addressing edaphic constraints to bean production: the Bean/Cowpea CRSP project in perspective. Field Crops Research, v. 82, n. 2-3, p.179-192, May 2003.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Arroz e Feijão. |
|    |
| Registros recuperados : 1 | |
|
| Expressão de busca inválida. Verifique!!! |
|
|
