Effect of volatile organic compounds released by Trichoderma spp. or Fusarium oxysporum on the selective attraction of Folsomia candida (Collembola)
The fruit from Physalis peruviana (Uchuva) is a highly valuable exportation product for Colombia due to its sweetness and coloration. However, Uchuva crops are susceptible to be devastated by the fungi Fusarium oxysporum causing great economic losses. As this fungus is very hard to control, it has b...
- Autores:
-
Mejía Rosas, Laura Andrea
- Tipo de recurso:
- Trabajo de grado de pregrado
- Fecha de publicación:
- 2018
- Institución:
- Universidad de los Andes
- Repositorio:
- Séneca: repositorio Uniandes
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.uniandes.edu.co:1992/39294
- Acceso en línea:
- http://hdl.handle.net/1992/39294
- Palabra clave:
- Uchuvas
Fusarium oxysporum
Trichoderma
Collembola
Microbiología
- Rights
- openAccess
- License
- http://creativecommons.org/licenses/by-nc-sa/4.0/
| Summary: | The fruit from Physalis peruviana (Uchuva) is a highly valuable exportation product for Colombia due to its sweetness and coloration. However, Uchuva crops are susceptible to be devastated by the fungi Fusarium oxysporum causing great economic losses. As this fungus is very hard to control, it has been proposed as an alternative the use biocontrol agents. We proposed that the combined use of Trichoderma spp. and Folsomia candida (Collembola) could be beneficial for the control of F. oxysporum in Uchuva plants. The aim of our study was to determine if the springtail F. candida is able to discriminate the volatile organic compounds (VOCs) released by F. oxysporum and Trichoderma spp. With a dual choice olfactometer, we tested the attraction of F. candida towards the VOCs released by an isolate of F. oxysporum (pathogenic to Uchuva), T. viridae, T. harzianum and T. longibrachiatum. Our results showed that F. candida was not significantly attracted to or repelled by T. harzianum, T. viridae and F. oxysporum. In contrast, T. longibrachiatum repelled significantly the springtail F. candida. In conclusion, from the point of view of organic volatiles, the use of T. longibrachiatum as a biocontrol agent is recommended for further in vitro experiments to control F. oxysporum. Also, it is suggested to study with more detail how they interact with each other and with soil components because additional sensory cues can be used by springtails to detect the presence of fungi in more complex environments |
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