| Journal: | Electronic journal of biotechnology |
| Database: | PERIÓDICA |
| System number: | 000267113 |
| ISSN: | 0717-3458 |
| Authors: | Roco, Angela1 Pérez, Luz María1 |
| Institutions: | 1Universidad Andrés Bello, Facultad Ciencias de la Salud, Santiago de Chile. Chile |
| Year: | 2001 |
| Season: | Ago |
| Volumen: | 4 |
| Number: | 2 |
| Country: | Chile |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | The in vitro biocontrol ability of Trichoderma harzianum on the phytopathogen Alternaria alternata improved in the presence of the growth regulators gibberellic acid (GA3), or indolacetic acid (IAA) or benzylaminopurine (BAP) or foliar nutrient at concentrations similar or higher than those used at the field level. These plant hormones decreased the secretion of endopolygalacturonase (endo-PG) of A. alternata by approximately 20%, did not modify endochitinase (endo-CH) secretion of T. harzianum and did not alter germination of conidia or mycelia growth of any of these fungi. The presence of T. harzianum decreased endo-PGase secretion of A. alternata by about 50%. This inhibitory effect was independent of the presence of growth regulators. The level of secreted endo-PG of T. harzianum was not modified by the presence of A. alternata, but the presence of this phytopathogen in cultures of T. harzianum, increased both the growth of the biocontroller and its secretion of endo-CH |
| Disciplines: | Agrociencias |
| Keyword: | Fitopatología, Biotecnología, Control biológico, Trichoderma harzianum, Alternaria alternata, Reguladores del crecimiento, Fitopatógenos |
| Keyword: | Agricultural sciences, Phytopathology, Biological control, Trichoderma harzianum, Alternaria alternata, Growth regulators, Phytopathogens |
| Full text: | Texto completo (Ver HTML) |
