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.
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Acknowledgements
We thank A.M. Tronsmo for helpful discussions and D. Pouhair for help in the greenhouse. This work was supported by the European Project 2E-BCAs in Crops (Food-CT-2003-001687). The content of this publication is the sole responsibility of its authors and in no way represents the view of the Commission or its services or anticipates its policy in this area.
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L’Haridon, F., Aimé, S., Alabouvette, C. et al. Lack of biocontrol capacity in a non-pathogenic mutant of Fusarium oxysporum f. sp. melonis . Eur J Plant Pathol 118, 239–246 (2007). https://doi.org/10.1007/s10658-007-9139-3
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DOI: https://doi.org/10.1007/s10658-007-9139-3