Abstract
AbstractEleven isolates of Botrytis cinerea were studied to examine the relationship between toxin production and virulence. After 5 days of incubation, screening experiments revealed significant differences in toxin production by the strains. The isolates with low toxin production were less virulent; moreover, the only toxins isolated were those corresponding to botrydial or its derivatives. In contrast, higher amounts of toxins were isolated from the more aggressive isolates. Furthermore, two classes of toxins, those with botryane skeleton and botcinolide derivatives, were detected in and isolated from all aggressive strains studied. This indicates that a synergistic action of several toxins is involved in the phytotoxicity of this phytopathogen.
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