Diversity and nitrogen fixation efficiency of rhizobia isolated from nodules of Centrolobium paraense
| Autor: | Jerri Édson Zilli, Liamara Perin, Paulo Emilio Kaminski, A. C. Baraúna, Gilmara Maria Duarte Pereira, Krisle da Silva |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
biology
fixação biológica de nitrogênio food and beverages diversidade bacteriana bacteria diversity biological nitrogen fixation biology.organism_classification rpoB 16S ribosomal RNA Bradyrhizobium lcsh:S1-972 Rhizobia Vigna Genus Botany Nitrogen fixation Rhizobium Animal Science and Zoology lcsh:Agriculture (General) Agronomy and Crop Science |
| Zdroj: | Pesquisa Agropecuária Brasileira, Vol 49, Iss 4, Pp 296-305 (2014) Pesquisa Agropecuária Brasileira v.49 n.4 2014 Pesquisa Agropecuária Brasileira Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| ISSN: | 1678-3921 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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