Correlation of phytotoxin production with pathogenicity of Streptomyces scabies isolates from scab infected potato tubers

Abstract

A total of 23 isolates obtained from scab infected potato tubers representative of six sampling areas in Eastern and Central Canada and five ATCC Streptomyces strains were screened for pathogenicity on the basis of their ability to initiate scab development on aseptically cultured minitubers and plant generated tubers. The results were then correlated with any associated generation of the scab inducing phytotoxin, Thaxtomin A. In all cases a positive correlation was demonstrated between the pathogenicity of various Streptomyces scabies isolates and their ability to produce the phytotoxin. © 1991 Springer.