Volume 12 Part 2 Article 78: Changes in Polyphenol Oxidase and Peroxidase Activity Due to Infection of Verticillium fungicola in Fruit Bodies of Agaricus bisporus

Volume 12 Part 2 Article 78
Year 1989
Title: Changes in Polyphenol Oxidase and Peroxidase Activity Due to Infection of Verticillium fungicola in Fruit Bodies of Agaricus bisporus
Authors: C.D. Thapa and M.F. Brown

Abstract:

Phenol oxidase catalyses the oxidation of mono and ortho diphenols, while peroxidase catalyses the oxidation of hydrogen donors in the presence of hydrogen peroxide (Mahadevan 1975). Dry bubble disease of mushroom (A. bisporus) caused by Verticillium fungicola is of common occurrence in all the major mushroom producing countries of the world. The disease manifests itself in the form of superficial brown spots on the pileus which coalesce into brown sunken spots which may extend down to the stipe as well. Mushrooms, being highly perishable, turn brown soon after harvesting and this browning has been attributed to changes in mushroom enzymes. In the present study, an attempt has been made to study the changes in polyphenol oxidase and peroxidase activity of fruit bodies of A. bisporus during different growth stages as induced by V. fungicola.

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