Phytopathological Chemistry of Black Rot Sweet Potato

Part XXVI. Activity of Proteolytic Enzymes in the Diseased Sweet Potato

Abstract

The proteolytic enzyme system in the tissues of sweet potato root was partially purified and its several characteristics were investigated. Based on the results from these preliminary experiments, we found that proteolytic activity in the tissues suffering from black rot declines as penetration of the pathogen proceeds. Procedures to extract the enzyme system from the affected plant tissues were also established. The diminution in activity of the affected tissues was discussed in connection with those results reported hitherto.