| Registro completo |
| Provedor de dados: |
PAB
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| País: |
Brazil
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| Título: |
Diversity and nitrogen fixation efficiency of rhizobia isolated from nodules of Centrolobium paraense
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| Autores: |
Baraúna,Alexandre Cardoso
Silva,Krisle da
Pereira,Gilmara Maria Duarte
Kaminski,Paulo Emílio
Perin,Liamara
Zilli,Jerri Edson
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| Data: |
2014-04-01
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| Ano: |
2014
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| Palavras-chave: |
Bradyrhizobium
Rhizobium
Bacteria diversity
Biological nitrogen fixation
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| Resumo: |
The objective of this work was to isolate and characterize rhizobia from nodules of Centrolobium paraense and to evaluate their symbiotic efficiency. Soil samples collected from four sites of the Roraima Cerrado, Brazil, were used to cultivate C. paraense in order to obtain nodules. Isolates (178) were obtained from 334 nodules after cultivation on medium 79. Twenty-five isolates belonging to six morphological groups were authenticated using Vigna unguiculata and they were characterized by 16S rRNA. Isolates identified as Bradyrhizobium were further characterized using rpoB gene sequencing. A greenhouse experiment was carried out with C. paraense to test the 18 authenticated isolates. Approximately 90% of the isolates grew slowly in medium 79. The 16S rRNA analysis showed that 14 authenticated isolates belong to the genus Bradyrhizobium, and rpoB indicated they constitute different groups compared to previously described species. Only four of the 11 fast-growing isolates nodulated V. unguiculata, two of which belong to Rhizobium, and two to Pleomorphomonas, which was not previously reported as a nodulating genus. The Bradyrhizobium isolates ERR 326, ERR 399, and ERR 435 had the highest symbiotic efficiency on C. paraense and showed a contribution similar to the nitrogen treatment. Centrolobium paraense is able to nodulate with different rhizobium species, some of which have not yet been described.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000400296
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| Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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| Relação: |
10.1590/S0100-204X2014000400008
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| Formato: |
text/html
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| Fonte: |
Pesquisa Agropecuária Brasileira v.49 n.4 2014
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| Direitos: |
info:eu-repo/semantics/openAccess
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