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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
24/07/2007 |
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Data da última atualização: |
03/08/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
GRANGE, L.; HUNGRIA, M.; GRAHAM, P. H.; MARTÍNEZ-ROMERO, E. |
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Afiliação: |
LUCIANA GRANGE, UFPR; MARIANGELA HUNGRIA DA CUNHA, CNPSO; PETER H. GRAHAM, University of Minnesota; ESPERANZA MARTÍNEZ-ROMERO, UNAM. |
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Título: |
New insights into the origins and evolution of rhizobia that nodulate common bean (Phaseolus vulgaris) in Brazil. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Soil Biology & Biochemistry, v. 39, n. 4, p.867-876, Apr. 2007. |
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DOI: |
http://dx.doi.org/10.1016/j.soilbio.2006.10.008 |
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Idioma: |
Inglês |
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Conteúdo: |
It is generally accepted that there are two major centers of genetic diversification of common beans (Phaseolus vulgaris L.): the Mesoamerican (Mexico, Colombia, Ecuador and north of Peru, probably the primary center), and the Andean (southern Peru to north of Argentina) centers. Wild common bean is not found in Brazil, but it has been grown in the country throughout recorded history. Common bean establishes symbiotic associations with a wide range of rhizobial strains and Rhizobium etli is the dominant microsymbiont at both centers of genetic diversification. In contrast, R. tropici, originally recovered from common bean in Colombia, has been found to be the dominant species nodulating field-grown common-bean plants in Brazil. However, a recent study using soil dilutions as inocula has shown surprisingly high counts of R. etli in two Brazilian ecosystems. In the present study, RFLP-PCR analyses of nodABC and nifH genes of 43 of those Brazilian R. etli strains revealed unexpected homogeneity in their banding patterns. The Brazilian R. etli strains were closely similar in 16S rRNA sequences and in nodABC and nifH RFLP-PCR profiles to the Mexican strain CFN 42T, and were quite distinct from R. etli and R. leguminosarum strains of European origin, supporting the hypothesis that Brazilian common bean and their rhizobia are of Mesoamerican origin, and could have arrived in Brazil in pre-colonial times. R. tropici may have been introduced to Brazilian soils later, or it may be a symbiont of other indigenous legume species and, due to its tolerance to acidic soils and high temperature conditions became the predominant microsymbiont of common bean. MenosIt is generally accepted that there are two major centers of genetic diversification of common beans (Phaseolus vulgaris L.): the Mesoamerican (Mexico, Colombia, Ecuador and north of Peru, probably the primary center), and the Andean (southern Peru to north of Argentina) centers. Wild common bean is not found in Brazil, but it has been grown in the country throughout recorded history. Common bean establishes symbiotic associations with a wide range of rhizobial strains and Rhizobium etli is the dominant microsymbiont at both centers of genetic diversification. In contrast, R. tropici, originally recovered from common bean in Colombia, has been found to be the dominant species nodulating field-grown common-bean plants in Brazil. However, a recent study using soil dilutions as inocula has shown surprisingly high counts of R. etli in two Brazilian ecosystems. In the present study, RFLP-PCR analyses of nodABC and nifH genes of 43 of those Brazilian R. etli strains revealed unexpected homogeneity in their banding patterns. The Brazilian R. etli strains were closely similar in 16S rRNA sequences and in nodABC and nifH RFLP-PCR profiles to the Mexican strain CFN 42T, and were quite distinct from R. etli and R. leguminosarum strains of European origin, supporting the hypothesis that Brazilian common bean and their rhizobia are of Mesoamerican origin, and could have arrived in Brazil in pre-colonial times. R. tropici may have been introduced to Brazilian soils later, or it may be a s... Mostrar Tudo |
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Thesagro: |
Feijão. |
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Categoria do assunto: |
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Marc: |
LEADER 02253naa a2200181 a 4500
001 1469811
005 2017-08-03
008 2007 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.soilbio.2006.10.008$2DOI
100 1 $aGRANGE, L.
245 $aNew insights into the origins and evolution of rhizobia that nodulate common bean (Phaseolus vulgaris) in Brazil.
260 $c2007
520 $aIt is generally accepted that there are two major centers of genetic diversification of common beans (Phaseolus vulgaris L.): the Mesoamerican (Mexico, Colombia, Ecuador and north of Peru, probably the primary center), and the Andean (southern Peru to north of Argentina) centers. Wild common bean is not found in Brazil, but it has been grown in the country throughout recorded history. Common bean establishes symbiotic associations with a wide range of rhizobial strains and Rhizobium etli is the dominant microsymbiont at both centers of genetic diversification. In contrast, R. tropici, originally recovered from common bean in Colombia, has been found to be the dominant species nodulating field-grown common-bean plants in Brazil. However, a recent study using soil dilutions as inocula has shown surprisingly high counts of R. etli in two Brazilian ecosystems. In the present study, RFLP-PCR analyses of nodABC and nifH genes of 43 of those Brazilian R. etli strains revealed unexpected homogeneity in their banding patterns. The Brazilian R. etli strains were closely similar in 16S rRNA sequences and in nodABC and nifH RFLP-PCR profiles to the Mexican strain CFN 42T, and were quite distinct from R. etli and R. leguminosarum strains of European origin, supporting the hypothesis that Brazilian common bean and their rhizobia are of Mesoamerican origin, and could have arrived in Brazil in pre-colonial times. R. tropici may have been introduced to Brazilian soils later, or it may be a symbiont of other indigenous legume species and, due to its tolerance to acidic soils and high temperature conditions became the predominant microsymbiont of common bean.
650 $aFeijão
700 1 $aHUNGRIA, M.
700 1 $aGRAHAM, P. H.
700 1 $aMARTÍNEZ-ROMERO, E.
773 $tSoil Biology & Biochemistry$gv. 39, n. 4, p.867-876, Apr. 2007.
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| 1. |  | FERNANDES, N. A. T.; LIMA, J. C. F.; RIBEIRO, M. T.; JAGUARIBE, L. L.; FERNANDES, A. J.; SOZZI, J. R.; SOUZA, C. S.; CARNEIRO, J. da C.; OTENIO, M. H. Dinâmica bacteriana na biodigestão anaeróbica de dejetos bovinos no período outono/inverno. In: SIMPÓSIO INTERNACIONAL SOBRE GERENCIAMENTO DE RESÍDUOS AGROPECUÁRIOS E AGROINDUSTRIAIS, 4., 2015, Rio de Janeiro, RJ. Anais... Brasília: Embrapa, 2015. 4 p.| Tipo: Artigo em Anais de Congresso |
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