Agaricus bisporus susceptibility to bacterial blotch in relation to environment: biochemical studies

Variation of Agaricus bisporus susceptibility to bacterial blotch in relation to environment was studied at the biochemical level. Significant differences were observed between A. bisporus strains for tyrosinase and gamma-glutamyl transferase (GGT) activities and for gamma-L(+)glutaminyl-4-hydroxybenzene (GHB) content. A lower effect was detected for compost quality. GGT activity and GHB content were related to strain susceptibility to bacterial blotch by a linear model depending on strain type, commercial or wild.