| Revista: | Scientia Agricola |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000455470 |
| ISSN: | 0103-9016 |
| Autores: | Amaral, Mayan Blanc1 Ribeiro, Thiago Gonçalves2 Alves, Gabriela Cavalcanti2 Coelho, Márcia Reed Rodrigues2 Matta, Frederico de Pina3 Baldani, José Ivo2 Baldani, Vera Lúcia Divan2 |
| Instituciones: | 1Universidade Federal Rural do Rio de Janeiro, Instituto de Agronomia, Seropedica, Rio de Janeiro. Brasil 2Empresa Brasileira de Pesquisa Agropecuaria, Agrobiologia, Seropedica, Rio de Janeiro. Brasil 3Empresa Brasileira de Pesquisa Agropecuaria, Pecuaria Sudeste, Sao Carlos, Sao Paulo. Brasil |
| Año: | 2022 |
| Volumen: | 79 |
| Número: | 2 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | This work aimed to isolate and characterize plant growth promoting rhizobacteria (PGPR) from 10 Paspalum genotypes and evaluate the effect of their inoculation on P. regnellii, P. atratum, and P. malacophyllum genotypes. The bacterial population ranged from undetectable to 107 bacterial cells per gram of fresh matter in the Paspalum genotypes. Initially, we isolated 164 bacteria from rhizospheric soil and roots of the Paspalum genotypes using media N-free LG agar plate, semi-solid NFb, and LGI. The isolates were characterized genetically and physiologically. The sequencing of 16S rRNA showed the presence of many genera, and some are new in association with Paspalum. The most common was Bacillus followed by Rhizobium, Paraburkholderia, Enterobacter, Cupriavidus, Pseudomonas, Dyadobacter and Acinetobacter. Thirty-eight per cent of isolates produced siderophores, 25 % produced solubilized phosphate, and only 9 % produced indolic compounds. Three greenhouse experiments were performed in randomized blocks with six replicates using representative bacterial strains isolated from P. regnellii, P. malacophyllum and P. atratum cv. Pojuca. We also included strain Sp245 (Azospirillum baldaniorum), uninoculated control, and nitrogen control (150 kg N ha−1). There was an increase of up to 53 % in shoot dry matter in P. regnellii inoculated with strain Sp245 and the shoots accumulated more N. In contrast, only small effects were observed for the other Paspalum genotypes inoculated with PGPR from the host genotypes. This study shows a high diversity of diazotrophic rhizosphere bacteria and suggests no strain specificity between the bacterial isolates and the Paspalum genotypes |
| Disciplinas: | Agrociencias, Biología |
| Palabras clave: | Bacterias, Fertilización, PGPR, Rizobacterias, Paspalum, Pastos tropicales, Biofertilizantes |
| Keyword: | Bacteria, Fertilization, Rhizobacteria, Paspalum, PGPR, Biofertilizers, Grasslands, Tropics |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
