The expression of extracellular fungal cell wall hydrolytic enzymes in different Trichoderma harzianum isolates correlates with their ability to control Pyrenochaeta lycopersici
Biol. Res
;
35(3/4): 401-410, 2002. ilus, tab
Article
in English
| LILACS
| ID: lil-339733
RESUMO
Four isolates of Trichoderma harzianum (ThN3, Th11, Th12 and Th16) were selected for their ability to control the in vitro development of the tomato root pathogen Pyrenochaeta lycopersici. Analysis of the mechanisms involved in biocontrol showed that the formation of non-volatile metabolites appears to be one of those involved in biocontrol of P. lycopersici by all T. harzianum isolates tested. Nevertheless, the higher secretion of chitinases, both in number of isoenzymes and activity by the Th11 strain, correlated well with its higher ability to control this agent in laboratory and greenhouse experiments as compared to the other T. harzianum isolates tested. The secretion of ß -1,3-endoglucanases and/or proteases appeared to have less significance than endochitinases in the biological control of P. lycopersici
Full text:
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Index:
LILACS (Americas)
Main subject:
Plant Diseases
/
Trichoderma
/
Solanum lycopersicum
/
Hydrolases
Language:
English
Journal:
Biol. Res
Journal subject:
Biology
Year:
2002
Type:
Article
/
Project document
Affiliation country:
Chile
Institution/Affiliation country:
Universidad Católica de Valparaíso/CL
/
Universidad Nacional Andrés Bello/CL
/
Universidad de Chile/CL
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