In vitro biocontrol activity of Trichoderma harzianum on Alternaria alternata in the presence of growth regulators

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Miniatura
Fecha
2001-08
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
Pontificia Universidad Católica de Valparaíso
Nombre de Curso
Licencia CC
Licencia CC
Resumen
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.
Notas
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582001000200006&lng=es&nrm=iso
Palabras clave
Alternaria, Biocontrol agent, Biological control, Chitinase, Endopolygalacturonase, Trichoderma
Citación
Electron. J. Biotechnol. v.4 n.2 Valparaíso ago. 2001
DOI
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