Anti-conidial Germination Factors Induced in the Presence of Probenazole in Infected Host Leaves. II. Structural Elucidation of the Major Component (Substance B)

Abstract

Substance B, the major component, isolated from rice plant treated with probenzaole and inoculated, having anti-conidial germination activity against blast fungus, was found to be a mixture of fatty acids, including palmitic acid, linoleic acid and linolenic acid. The main compound of substance B was linolenic acid, having strong anti-conidial germination activity. It was determined as a-linolenic acid by gas chromatographic analysis. The minor components showed little or no anti-conidial germination activity.