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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
21/05/2021 |
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Data da última atualização: |
21/05/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MATOS, G. F. de; ROUWS, L. F. M.; ARAUJO, J. L. S. de; BALDANI, J. I. |
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Afiliação: |
GUSTAVO FEITOSA DE MATOS, UFRRJ; LUC FELICIANUS MARIE ROUWS, CNPAB; JEAN LUIZ SIMOES DE ARAUJO, CNPAB; JOSE IVO BALDANI, CNPAB. |
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Título: |
Evolution and function of nitrogen fixation gene clusters in sugarcane associated Bradyrhizobium strains. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Environmental Microbiology, Published Online 15 May 2021. |
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Idioma: |
Inglês |
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Conteúdo: |
Bradyrhizobium spp. are well known to mediate biological nitrogen xation (BNF) as microsymbionts inhabiting nodules on leguminous plants. However, they may also contribute to plant growth via freeliving N2 xation (FLNF) in association with nonlegumes. Notably, several Bradyrhizobium strains from sugarcane roots display FLNF ctivity. Among them, Bradyrhizobium sacchari is a legume symbiotic species, whereas strains AG48 and M12 are non-symbiotic. In the present study, a phylogenomic pproach was applied to study peculiarities of these and other Bradyrhizobium strains with respect to N xation (nif) gene content in order to reveal genetic features that enable FNLF in Bradyrhizobium spp. All FLNF strains carry an ancestral ?non-symbiotic? nifgene cluster (NSC). B. sacchari also contains a second ?symbiotic? nif-gene cluster (SC), a characteristic observed in only three of 156 evaluated genomes. B. sacchari stood out and presented a high level of sequence divergence between individual nif-gene homologues and we discuss scenarios for the evolutionary origin of these clusters. The transcript level of NSC nifH gene increased during FLNF, when compared to symbiotic conditions. The data suggest that sugarcane roots harbor diverse Bradyrhizobium spp. that are genetically adapted to a dynamic environment where leguminous and non-leguminous host plants are alternately available. |
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Palavras-Chave: |
Biological nitrogen fixation; Fabaceae family. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01998naa a2200181 a 4500
001 2131954
005 2021-05-21
008 2021 bl uuuu u00u1 u #d
100 1 $aMATOS, G. F. de
245 $aEvolution and function of nitrogen fixation gene clusters in sugarcane associated Bradyrhizobium strains.$h[electronic resource]
260 $c2021
520 $aBradyrhizobium spp. are well known to mediate biological nitrogen xation (BNF) as microsymbionts inhabiting nodules on leguminous plants. However, they may also contribute to plant growth via freeliving N2 xation (FLNF) in association with nonlegumes. Notably, several Bradyrhizobium strains from sugarcane roots display FLNF ctivity. Among them, Bradyrhizobium sacchari is a legume symbiotic species, whereas strains AG48 and M12 are non-symbiotic. In the present study, a phylogenomic pproach was applied to study peculiarities of these and other Bradyrhizobium strains with respect to N xation (nif) gene content in order to reveal genetic features that enable FNLF in Bradyrhizobium spp. All FLNF strains carry an ancestral ?non-symbiotic? nifgene cluster (NSC). B. sacchari also contains a second ?symbiotic? nif-gene cluster (SC), a characteristic observed in only three of 156 evaluated genomes. B. sacchari stood out and presented a high level of sequence divergence between individual nif-gene homologues and we discuss scenarios for the evolutionary origin of these clusters. The transcript level of NSC nifH gene increased during FLNF, when compared to symbiotic conditions. The data suggest that sugarcane roots harbor diverse Bradyrhizobium spp. that are genetically adapted to a dynamic environment where leguminous and non-leguminous host plants are alternately available.
653 $aBiological nitrogen fixation
653 $aFabaceae family
700 1 $aROUWS, L. F. M.
700 1 $aARAUJO, J. L. S. de
700 1 $aBALDANI, J. I.
773 $tEnvironmental Microbiology, Published Online 15 May 2021.
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| 3. |  | MENDES, W.; LEMOS, P. de O. e C.; LEMOS, R. C.; CARVALHO, L. G. de O.; ROSENBURG, R. J. Contribuição ao mapeamento, em séries, dos solos do município de Itaguaí. Rio de Janeiro: Centro Nacional de Ensino e Pesquisas Agronômicas, 1954. 53 p. (Boletim do Instituto de Ecologia e Experimentação Agrícolas, 12). Comissão de publicação de trabalhos técnicos: Alfredo Cesar do Nascimento, Petezval de Oliveira e Cruz Lemos, Abeilard Fernando de Castro.| Biblioteca(s): Embrapa Solos. |
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| 4. | | MENDES, W.; BARROS, H. da C.; BENNEMA, J.; VETTORI, L.; CAMARGO, M. N.; LEMOS, R. C. de; ALVAHYDO, R.; LEMOS, P. de O. e C. Carta dos solos da região sob influência do Reservatório de Furnas. [S.l.]: CNEPA-SNPA: Instituto de Química Agrícola: Instituto de Ecologia e Experimentação Agrícolas: Instituto Agronômico de Minas Gerais, 1961. 1 mapa, color. Escala 1:250.000. Area 14.055 km2. Execucao: Marcelo Nunes Camargo, coord., Bernardo Carvalho Avelar e outros. Pertence a publicacao BRASIL. Ministerio da Agricultura. Centro Nacional de Ensino e Pesquisas Agronomicas. Servico Nacional de Pesquisa...| Biblioteca(s): Embrapa Solos. |
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| Registros recuperados : 5 | |
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