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Registro Completo |
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
24/07/2007 |
Data da última atualização: |
25/07/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
BARCELLOS, F. G.; MENNA, P.; BATISTA, J. S. da S.; HUNGRIA, M. |
Afiliação: |
FERNANDO GOMES BARCELLOS; PÂMELA MENNA, UEL; JESIANE STEFÂNIA DA SILVA BATISTA†, UEL; MARIANGELA HUNGRIA DA CUNHA, CNPSO. |
Título: |
Evidence of horizontal transfer of symbiotic genes from a Bradyrhizobium japonicum inoculant strain to indigenous diazotrophs Sinorhizobium (Ensifer) fredii and Bradyrhizobium elkanii in a brazilian savannah soil. |
Ano de publicação: |
2007 |
Fonte/Imprenta: |
Applied and Environmental Microbiology, v. 73, n. 8, p. 2635-2643, Apr. 2007. |
DOI: |
10.1128/AEM.01823-06 |
Idioma: |
Inglês |
Conteúdo: |
The importance of horizontal gene transfer (HGT) in the evolution and speciation of bacteria has been emphasized; however, most studies have focused on genes clustered in pathogenesis and very few on symbiosis islands. Both soybean (Glycine max [L.] Merrill) and compatible Bradyrhizobium japonicum and Bradyrhizobium elkanii strains are exotic to Brazil and have been massively introduced in the country since the early 1960s, occupying today about 45% of the cropped land. For the past 10 years, our group has obtained several isolates showing high diversity in morphological, physiological, genetic, and symbiotic properties in relation to the putative parental inoculant strains. In this study, parental strains and putative natural variants isolated from field-grown soybean nodules were genetically characterized in relation to conserved genes (by repetitive extragenic palindromic PCR using REP and BOX A1R primers, PCR-restriction fragment length polymorphism, and sequencing of the 16SrRNA genes), nodulation, and N2-fixation genes (PCR-RFLP and sequencing of nodY-nodA, nodC, and nifH genes). Both genetic variability due to adaptation to the stressful environmental conditions of the Brazilian Cerrados and HGT events were confirmed. One strain (S 127) was identified as an indigenous B. elkanii strain that acquired a nodC gene from the inoculant B. japonicum. Another one (CPAC 402) was identified as an indigenous Sinorhizobium (Ensifer) fredii strain that received the whole symbiotic island from the B. japonicum inoculant strain and maintained an extra copy of the original nifH gene. The results highlight the strategies that bacteria may commonly use to obtain ecological advantages, such as the acquisition of genes to establish effective symbioses with an exotic host legume. MenosThe importance of horizontal gene transfer (HGT) in the evolution and speciation of bacteria has been emphasized; however, most studies have focused on genes clustered in pathogenesis and very few on symbiosis islands. Both soybean (Glycine max [L.] Merrill) and compatible Bradyrhizobium japonicum and Bradyrhizobium elkanii strains are exotic to Brazil and have been massively introduced in the country since the early 1960s, occupying today about 45% of the cropped land. For the past 10 years, our group has obtained several isolates showing high diversity in morphological, physiological, genetic, and symbiotic properties in relation to the putative parental inoculant strains. In this study, parental strains and putative natural variants isolated from field-grown soybean nodules were genetically characterized in relation to conserved genes (by repetitive extragenic palindromic PCR using REP and BOX A1R primers, PCR-restriction fragment length polymorphism, and sequencing of the 16SrRNA genes), nodulation, and N2-fixation genes (PCR-RFLP and sequencing of nodY-nodA, nodC, and nifH genes). Both genetic variability due to adaptation to the stressful environmental conditions of the Brazilian Cerrados and HGT events were confirmed. One strain (S 127) was identified as an indigenous B. elkanii strain that acquired a nodC gene from the inoculant B. japonicum. Another one (CPAC 402) was identified as an indigenous Sinorhizobium (Ensifer) fredii strain that received the whole symbiotic... Mostrar Tudo |
Thesagro: |
Fixação de Nitrogênio; Soja. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02508naa a2200193 a 4500 001 1470103 005 2017-07-25 008 2007 bl uuuu u00u1 u #d 024 7 $a10.1128/AEM.01823-06$2DOI 100 1 $aBARCELLOS, F. G. 245 $aEvidence of horizontal transfer of symbiotic genes from a Bradyrhizobium japonicum inoculant strain to indigenous diazotrophs Sinorhizobium (Ensifer) fredii and Bradyrhizobium elkanii in a brazilian savannah soil. 260 $c2007 520 $aThe importance of horizontal gene transfer (HGT) in the evolution and speciation of bacteria has been emphasized; however, most studies have focused on genes clustered in pathogenesis and very few on symbiosis islands. Both soybean (Glycine max [L.] Merrill) and compatible Bradyrhizobium japonicum and Bradyrhizobium elkanii strains are exotic to Brazil and have been massively introduced in the country since the early 1960s, occupying today about 45% of the cropped land. For the past 10 years, our group has obtained several isolates showing high diversity in morphological, physiological, genetic, and symbiotic properties in relation to the putative parental inoculant strains. In this study, parental strains and putative natural variants isolated from field-grown soybean nodules were genetically characterized in relation to conserved genes (by repetitive extragenic palindromic PCR using REP and BOX A1R primers, PCR-restriction fragment length polymorphism, and sequencing of the 16SrRNA genes), nodulation, and N2-fixation genes (PCR-RFLP and sequencing of nodY-nodA, nodC, and nifH genes). Both genetic variability due to adaptation to the stressful environmental conditions of the Brazilian Cerrados and HGT events were confirmed. One strain (S 127) was identified as an indigenous B. elkanii strain that acquired a nodC gene from the inoculant B. japonicum. Another one (CPAC 402) was identified as an indigenous Sinorhizobium (Ensifer) fredii strain that received the whole symbiotic island from the B. japonicum inoculant strain and maintained an extra copy of the original nifH gene. The results highlight the strategies that bacteria may commonly use to obtain ecological advantages, such as the acquisition of genes to establish effective symbioses with an exotic host legume. 650 $aFixação de Nitrogênio 650 $aSoja 700 1 $aMENNA, P. 700 1 $aBATISTA, J. S. da S. 700 1 $aHUNGRIA, M. 773 $tApplied and Environmental Microbiology$gv. 73, n. 8, p. 2635-2643, Apr. 2007.
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Embrapa Soja (CNPSO) |
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Biblioteca(s): |
Embrapa Meio-Norte. |
Data corrente: |
24/10/2002 |
Data da última atualização: |
21/08/2023 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
OLIVEIRA, J. T. A.; ANDRADE, N. C.; MIRANDA, A. S. M.; BARRETO, A. L. H.; MELO, V. M. M.; FERNANDES, C. F.; VASCONCELOS, I. M.; SILVEIRA, J. A. G.; CAVALCANTI, F. R.; FREIRE FILHO, F. R.; FREIRE, F. C. O.; GONÇALVES, F. J. T. |
Título: |
Atividades peroxidásica e ß-1, 3 - Glucanásica elicitadas por agentes bióticos causadores de doenças e pelo estresse hídrico em feijão-de-corda (Vigna unguiculata (L.) Walp.). |
Ano de publicação: |
2001 |
Fonte/Imprenta: |
In: REUNIÃO NACIONAL DE PESQUISA DE CAUPI, 5., 2001, Teresina. Avanços tecnológicos no feijão caupi: anais. Teresina: Embrapa Meio-Norte, 2001. p. 19-23. |
Série: |
(Embrapa Meio-Norte. Documentos, 56). |
Idioma: |
Português |
Conteúdo: |
As atividades peroxidásicas e B-1, 3-glucanhica elicitadas por agentes causadores de doenças e pelo estresse hidrico em feijão-de-corda foram estudadas. |
Palavras-Chave: |
3-glucanase; Colletothricum gloesporioides; Estresse hídrico; Feijão-de-corda; ß-1. |
Thesagro: |
Meloidogyne Incognita; Peroxidase; Vigna Unguiculata. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/198446/1/Renac34-38.pdf
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Marc: |
LEADER 01419nam a2200349 a 4500 001 1064668 005 2023-08-21 008 2001 bl uuuu u00u1 u #d 100 1 $aOLIVEIRA, J. T. A. 245 $aAtividades peroxidásica e ß-1, 3 - Glucanásica elicitadas por agentes bióticos causadores de doenças e pelo estresse hídrico em feijão-de-corda (Vigna unguiculata (L.) Walp.).$h[electronic resource] 260 $aIn: REUNIÃO NACIONAL DE PESQUISA DE CAUPI, 5., 2001, Teresina. Avanços tecnológicos no feijão caupi: anais. Teresina: Embrapa Meio-Norte, 2001. p. 19-23.$c2001 490 $a(Embrapa Meio-Norte. Documentos, 56). 520 $aAs atividades peroxidásicas e B-1, 3-glucanhica elicitadas por agentes causadores de doenças e pelo estresse hidrico em feijão-de-corda foram estudadas. 650 $aMeloidogyne Incognita 650 $aPeroxidase 650 $aVigna Unguiculata 653 $a3-glucanase 653 $aColletothricum gloesporioides 653 $aEstresse hídrico 653 $aFeijão-de-corda 653 $aß-1 700 1 $aANDRADE, N. C. 700 1 $aMIRANDA, A. S. M. 700 1 $aBARRETO, A. L. H. 700 1 $aMELO, V. M. M. 700 1 $aFERNANDES, C. F. 700 1 $aVASCONCELOS, I. M. 700 1 $aSILVEIRA, J. A. G. 700 1 $aCAVALCANTI, F. R. 700 1 $aFREIRE FILHO, F. R. 700 1 $aFREIRE, F. C. O. 700 1 $aGONÇALVES, F. J. T.
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