| Revue: | Electronic journal of biotechnology |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000266083 |
| ISSN: | 0717-3458 |
| Autores: | Bernal, Giuliano1 Illanes, Andrés2 Ciampi, Luigi |
| Instituciones: | 1Universidad Austral de Chile, Facultad de Ciencias Agrarias, Isla Teja. Chile 2Pontificia Universidad Católica de Valparaíso, Facultad de Ingeniería, Valparaíso. Chile |
| Año: | 2002 |
| Periodo: | Abr |
| Volumen: | 5 |
| Número: | 1 |
| Paginación: | 7-8 |
| País: | Chile |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en inglés | The use of microorganisms for biological purposes has become an effective alternative to control plant pathogens. There are many examples of formulations using bacterial or fungal strains with biocontrol applications. Among them, members of the genus Bacillus are well known antibiotic producers. However, the increased capacity of antibiotic production obtained by direct mutagenesis of wild strains, has seldom been reported in the open literature. This research refers to the mutation of the A47 Bacillus strain, a plant pathogen antagonist, in order to obtain an improved strain with enhanced capacity to synthesize metabolites with antibiotic activity. The mutant strain M40 was obtained using the mutagenic agent acridine orange. The mutant strain showed a higher antagonistic activity than the wild type A47 against the plant pathogen Botritys cinerea (grey mould), Ralstonia solanacearum (bacterial wilt) and Erwinia carotovora var. carotovora (bacterial soft rot). The final objective was to isolate the antibiotic metabolite produced by the M40 strain and to determine its chemical and antibiotic properties. The results revealed the presence of an extracellular, thermostable and methanol-soluble metabolite that absorbed light at 212nm. These characteristics are similar to those described for cyclic antibiotic lipopeptides such as iturins |
| Disciplinas: | Agrociencias, Biología |
| Palabras clave: | Fitopatología, Bacterias, Biotecnología, Mutantes, Metabolitos, Bacillus, Control biológico |
| Keyword: | Agricultural sciences, Biology, Phytopathology, Bacteria, Mutants, Metabolites, Bacillus, Biological control |
| Texte intégral: | Texto completo (Ver HTML) |
