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01.10.2012

Exploring the biocontrol potential of fungal endophytes from an Andean Colombian Paramo ecosystem

verfasst von: L. A. Miles, C. A. Lopera, S. González, M. C. Cepero de García, A. E. Franco, S. Restrepo

Erschienen in: BioControl | Ausgabe 5/2012

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Abstract

We studied the diversity and biocontrol potential of 100 fungal endophytes isolated from Espeletia spp., endemic plant species from the Paramo in the Andean mountain range. Our sample was genotypically highly diverse at all ITS similarity levels. The antagonistic properties of these isolates were tested against common crop pathogens in Colombia, including Pectobacterium carotovorum, Ralstonia solanacearum, Pseudomonas syringae, Xanthomonas campestris, Rhizoctonia solani, Botrytis cinerea, Fusarium oxysporum, and Phytophthora infestans. All endophytic isolates were able to significantly inhibit the growth of at least one of the plant pathogens tested (P < 0.05). Three main types of endophyte/pathogen interactions were observed. However, only those endophytes that produced an evident inhibition halo were further studied using their crude extracts to confirm that the inhibitory effect was due to the production of endophytic bioactive metabolites. From these experiments, nine promising isolates were selected for co-inoculation tests with R. solani in tomato plants. The isolates identified as Aureobasidium pullulans and Paraconiothyrium sporulosum not only protected the plants against this pathogen but also allowed them to exhibit similar growth and development as the uninoculated control. This work explores new alternatives for disease management without the application of chemical pesticides.

Vorheriger Artikel Evaluation of Trichoderma harzianum strain T22 as biological control agent of Calonectria pauciramosa

Nächster Artikel Potential for integrated biological and chemical control of damping-off disease caused by Pythium ultimum in tomato

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Titel: Exploring the biocontrol potential of fungal endophytes from an Andean Colombian Paramo ecosystem
verfasst von: L. A. Miles
C. A. Lopera
S. González
M. C. Cepero de García
A. E. Franco
S. Restrepo
Publikationsdatum: 01.10.2012
Verlag: Springer Netherlands
Erschienen in: BioControl / Ausgabe 5/2012
Print ISSN: 1386-6141
Elektronische ISSN: 1573-8248
DOI: https://doi.org/10.1007/s10526-012-9442-6

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