Article

American Potato Journal

, Volume 68, Issue 10, pp 675-680

First online:

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

  • Russell R. KingAffiliated withResearch Branch, Research Station, Agriculture Canada
  • , C. Harold LawrenceAffiliated withResearch Branch, Research Station, Agriculture Canada
  • , Mervyn C. ClarkAffiliated withResearch Branch, Research Station, Agriculture Canada

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Abstract

A total of 23 isolates obtained from scab infected potato tubers representative of six sampling areas in Eastern and Central Canada and five ATCCStreptomyces 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 variousStreptomyces scabies isolates and their ability to produce the phytotoxin.

Compendio

Un total de 23 aislamientos obtenidos de tubérculos de papa infectados con sarna, representativos de seis áreas de muestreo del este y centro del Canadá y cinco ATCC especies deStreptomyces fueron evaluados y seleccionados para patogenicidad en base a su capacidad de iniciar el desarrollo de la sarna en mini-tubérculos asépticamente cultivados y en tubérculos obtenidos de plantas. Los resultados fueron luego correlacionados con cualquier asociación con la generación de la fitotoxina inducida por la sarna, Thaxtomina A. En todos los casos quedó demostrada la existencia de una correlación positiva entre la patogenicidad de varios aislamientos deStreptomyces scabies y su capacidad para producir la fitotoxina.