European Journal of Plant Pathology (2007) 118, 239-246

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Floriane L'Haridon, Sébastien Aimé, Claude Alabouvette and Chantal Olivain (2007)
Lack of biocontrol capacity in a non-pathogenic mutant of Fusarium oxysporum f. sp. melonis
European Journal of Plant Pathology 118 (3), 239-246
Abstract: The aim of this study was to assess the biocontrol capacity of rev157, a non-pathogenic mutant of a pathogenic strain of Fusarium oxysporum f. sp. melonis (Fom24). Inoculated in association with the virulent parental strain, the mutant rev157 did not protect the host plant (muskmelon) against infection by Fom24. Applied on flax, a non-host plant, the mutant rev157 was not able to protect it against its specific pathogen F. oxysporum f. sp. lini. On the contrary the parental strain Fom24 did protect flax as well as a soil-borne biocontrol strain (Fo47). Since the mutant rev157 was affected neither in its growth in vitro nor in its capacity to penetrate into the roots, it can be speculated that the mutation has affected traits responsible for interactions within the plant. In F. oxysporum the pair of strains Fom24/rev157 is a good candidate to identify genes involved in the biocontrol capacity of F. oxysporum and to test the hypothesis of a link between capacity to induce the disease and capacity to induce resistance in the plant.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Claude Alabouvette

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Fusarium glycines Linseed/flax (Linum usitatissimum)
Fusarium oxysporum f.sp. melonis Melon (Cucumis melo)
Fusarium oxysporum (antagonist) Fusarium glycines Linseed/flax (Linum usitatissimum)
Fusarium oxysporum (antagonist) Fusarium oxysporum f.sp. melonis
Fusarium oxysporum