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The influence of berries infected with Botrytis cinerea on the enzymic breakdown of sulphited strawberries
Author(s) -
HARRIS JANE E.,
DENNIS COLIN
Publication year - 1982
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1982.tb00806.x
Subject(s) - botrytis cinerea , mucor , biology , polyphenol oxidase , pectinase , botrytis , rhizopus , botany , fragaria , catechol oxidase , horticulture , penicillium , enzyme , food science , biochemistry , peroxidase , fermentation
SUMMARY Endo‐polygalacturonase produced by Botrytis cinerea is rapidly inactivated in infected strawberry tissue both by the naturally occurring fruit phenolics and also by those oxidised compounds formed as a result of polyphenol oxidase activity in the infected tissue. In contrast, the endo‐polygalacturonases of Mucor piriformis, Rhizopus sexualis and R. stolonifer are more resistant to inactivation by the fruit phenolics and no polyphenol oxidase was detected in tissue infected by these fungi. The presence of Botrytis ‐infected berries in sulphited fruit containing tissue infected with Mucor or Rhizopus resulted in more rapid inactivation of the endopolygalacturonases from the latter fungi, and hence reduced the amount of softening and breakdown of the fruit. This inactivation is considered to be due largely to the oxidised phenolics present in Botrytis ‐infected tissue.