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

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dc.contributor.authorRoco, Angela
dc.contributor.authorPérez, Luz María
dc.date.accessioned2014-05-05T14:09:00Z
dc.date.accessioned2016-05-31T19:50:56Z
dc.date.available2014-05-05T14:09:00Z
dc.date.available2016-05-31T19:50:56Z
dc.date.issued2001-08
dc.descriptionhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582001000200006&lng=es&nrm=isoes
dc.description.abstractThe 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.es
dc.identifier.citationElectron. J. Biotechnol. v.4 n.2 Valparaíso ago. 2001es
dc.identifier.issn0717-3458
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/2443
dc.language.isoenes
dc.publisherPontificia Universidad Católica de Valparaísoes
dc.subjectAlternariaes
dc.subjectBiocontrol agentes
dc.subjectBiological controles
dc.subjectChitinasees
dc.subjectEndopolygalacturonasees
dc.subjectTrichodermaes
dc.titleIn vitro biocontrol activity of Trichoderma harzianum on Alternaria alternata in the presence of growth regulatorses
dc.typeArtículoes
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