Actividad antagónica de Trichoderma asperellum (Fungi: Ascomycota) a diferentes temperaturas

ABSTRACT: The genus Trichoderma (Fungi: Ascomycota: Sordariomycetes: Hypocreaceae) contains species with high antagonistic capacity. It has been determined that the temperature can be a limiting factor for growth of these species. Evaluation in vitro may suggest their eld performance, allowing evide...

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Autores:
Vargas Hoyos, Harold Alexander
Rueda Lorza, Ever Antoni
Gilchrist Ramelli, Elizabeth
Tipo de recurso:
Article of investigation
Fecha de publicación:
2012
Institución:
Universidad de Antioquia
Repositorio:
Repositorio UdeA
Idioma:
spa
OAI Identifier:
oai:bibliotecadigital.udea.edu.co:10495/10164
Acceso en línea:
http://hdl.handle.net/10495/10164
Palabra clave:
Antagonismo in-vitro
Colletotrichum
In vitro antagonism
Rhizoctonia
Rhizoctonia sp
Temperatura
Temperature
Trichoderma sp
Rights
openAccess
License
Atribución-NoComercial-CompartirIgual 2.5 Colombia (CC BY-NC-SA 2.5 CO)
Description
Summary:ABSTRACT: The genus Trichoderma (Fungi: Ascomycota: Sordariomycetes: Hypocreaceae) contains species with high antagonistic capacity. It has been determined that the temperature can be a limiting factor for growth of these species. Evaluation in vitro may suggest their eld performance, allowing evidence of viable isolates for use in biological control. In this paper, 27 isolates of Trichoderma spp. were assayed using a dual culture against Rhizoctonia sp. (Fungi: Agaricomycetes) and Colletotrichum sp. (Fungi: Sordariomycetes). From those, 16 and 9 showed an inhibition ≥ 70% against Rhizoctonia sp. and Colletotrichum sp., respectively. The isolates T46, T84, T92, and T109 achieved an inhibition ≥ 75% for both phytopathogens. These isolates were submitted to different temperatures: 4, 10, 15, 20, 25, and 30 °C in order to evaluate their antagonism against Rhizoctonia sp. With the exception of 4 °C, for every temperature assayed the inhibition in growth of the phytopathogen was ≥ 75%. For 30 °C both antagonists inhibited the growth of Rhizoctonia sp.; T46 at 94% and T109 at 95%. Biological activity was shown for all the temperatures, con rming the antagonistic potential of this microorganism.