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Identificación de cepas de Trichoderma spp., nativas del estado de Querétaro con actividad antagónica contra el hongo fitopatógeno Fusarium Oxysporum
| Content Provider | Semantic Scholar |
|---|---|
| Author | Sánchez, García Javier, Víctor |
| Copyright Year | 2016 |
| Abstract | As any industry, the agriculture is exposed to various problems that affect significantly their sustainability. One of the most serious problems in the agricultural industry is the presence of phytopathogenic organisms, which can severely affect the economy of producers and consumers. Chemical control of these organisms brings with it to health problems, damages to the environment and eventually, selection of resistant fungal strains. Fungi of the genus Trichoderma spp. have been recognized as biocontrol agents of various plant pathogenic organisms, including F. oxysporum. Through various mechanisms, Trichoderma is capable of inhibit the growth of phytopathogenic fungi, reducing its incidence in agricultural crops. In this project, strains of Trichoderma spp. were isolated from different regions of the state of Queretaro. The isolated strains were compared in tests of antibiosis and mycoparasitism against Fusarium oxysporum; also, strains isolates were identified by a phylogenetic analysis of the ribosomal gene 5.8S DNAr. In total, 51 strains of Trichoderma were isolated, of which the majority had an important antagonistic activity against F. oxysporum, through either the micoparasitism or secretion of volatile or nonvolatile secondary metabolites. Antibiosis by volatile metabolites was more effective than not volatile metabolites. Also, were identified 28 isolates of Trichoderma spp., among which are T. koningiopsis, T. gamsii, T. atroviride, T. tomentosum, T. saturnisporium, T. harzianum, T. asperellum, and a strain which species couldn?t be determined, although it was grouped within the cluster Longibrachiatum. These data suggest that some isolates, as AD3, or a synergistic formulation between strains and / or species, are capable of acting as biological control agents against F. oxysporum, and probably against other phytopathogenic fungi. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://ri.uaq.mx/bitstream/123456789/7585/1/RI004748.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
