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Repression of laccase formation in botrytis cinerea and its possible relation to phytopathogenicity

Repression of laccase formation in botrytis cinerea and its possible relation to phytopathogenicity

Phytochemistry 27(8): 2505-2510

It is shown that addition of EDTA to the culture medium of Botrytis cinerea can repress laccase formation and that this effect if reversed by addition of copper. EGTA also repressed laccase formation, by a different mechanism. Pretreatment of cucumber fruit with EDTA reduced the infection by Botrytis and prevented laccase formation. Cucumber fruit contained substances which were able to repress laccase formation. Resistance to Botrytis and the ability of extracts of the fruit to repress laccase formation were correlated, as well low levels of laccase in strains with fungicide resistance and low infectivity. The observations suggest that laccase formation is a necessary but insufficient requirement for infection by Botrytis.

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Accession: 006315020

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DOI: 10.1016/0031-9422(88)87018-3

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