Data/hora: 03/06/2024 04:23:53

Provedor de dados: | Acta Scientiarum: Agronomy
País: | Brazil
Título: | Symbiosis of rhizobia with Gliricidia sepium  and Clitoria fairchildiana in an Oxisol in the pre-Amazon region of Maranhão State
Autores: | Coelho, Katia Pereira; Ribeiro, Paula Rose de Almeida; Moura, Emanoel Gomes de; Aguiar, Alana das Chagas Ferreira; Rodrigues, Tainara Louzada; Moreira, Fatima Maria de Souza.
Data: | 2018-03-01
Ano: | 2018
Palavras-chave: | Bradyrhizobium; Rhizobium; Papilionoideae; Tree legumes; Acid soil.; Microbiologia e Bioquímica do Solo.
Resumo: | Gliricidia (Gliricidia sepium) and sombreiro (Clitoria fairchildiana) have been recommended for agroforestry systems and reforestation of degraded areas due to their fast growth and symbiosis with rhizobia. However, little is known about native populations that nodulate these species. The objective of this study was to evaluate the phenotypic and genetic diversity of nitrogen-fixing bacteria isolated from nodules of gliricidia and sombreiro in alley cropping systems located in the pre-Amazon region of Maranhão State and to confirm their nodulation ability. Nodules were field collected from 20 plants of each species. The isolated strains were characterized morphologically, their 16S rRNA gene was partially sequenced, and their symbiotic ability was authenticated in siratro (Macroptilium atropurpureum). Despite being in the same climate and soil conditions, gliricidia and sombreiro are nodulated by different rhizobia genera, with Rhizobium predominant in gliricidia and Bradyrhizobium in sombreiro. Endophytic strains also colonized nodules in the field. Approximately 60% of Rhizobium strains did not nodulate siratro, whereas all Bradyrhizobium strains did. Native strains isolated from gliricidia nodules had low efficiency, and only four strains isolated from sombreiro nodules were efficient in siratro. These results highlight the importance of symbiotic relationships in the regulation of biological nitrogen fixation.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35248

10.4025/actasciagron.v40i1.35248

Editor: | Universidade Estadual de Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/35248/pdf
Formato: | application/pdf

Fonte:

Acta Scientiarum. Agronomy; Vol 40 (2018): Publicação Contínua; e35248

Acta Scientiarum. Agronomy; v. 40 (2018): Publicação Contínua; e35248

1807-8621

1679-9275

Fonte: | Copyright (c) 2018 Acta Scientiarum. Agronomy