Abstract
Muskmelon ( Cucumis melo L.) explants (cotyledon fragments) derived from susceptible and resistant genotypes to Fusarium oxysporum f. sp. melonis ( Fom) were exposed to the culture filtrates of five isolates. Texture, growth and mortality rate of the fragments were investigated after one month of culture. Explants from susceptible and resistant genotypes were sensitive to the culture filtrates of pathogenic and nonpathogenic isolates of Fom. In our experimental conditions, we failed to observe a correlation between the resistance genes to Fom and the susceptibility of explants to culture filtrate. Based on initial work, this in vitro bioassay cannot be used for evaluating sources of resistance in muskmelon to Fom or for assessing specific pathogenicity of fungus isolates.
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