Short Communication

American Journal of Potato Research

, Volume 83, Issue 1, pp 67-70

Relative susceptibility of potato varieties toStreptomyces scabiei andS. acidiscabies

  • D. H. LambertAffiliated withDepartment of Plant, Soil and Environmental Sciences, University of Maine Email author 
  • , A. F. ReevesAffiliated withAroostook Research FarmDepartment of Biological Sciences, University of Maine Orono
  • , R. W. GothAffiliated withUSDA/ARS
  • , G. S. GroundsAffiliated withAroostook Research FarmDepartment of Biological Sciences, University of Maine Orono
  • , E. A. GiggieAffiliated withDepartment of Plant, Soil and Environmental Sciences, University of MaineAroostook Research Farm

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Abstract

In 2000 and 2004, 19 potato varieties were grown in separate plots inoculated with the scab pathogensStreptomyces scabiei andS. acidiscabies. Reaction of the varieties to these two species were highly correlated in both years, with no host variety-pathogen species interaction. These results are consistent with the central role of the bacterial toxin thaxtomin in scab development, and indicate that this and other mechanisms involved in pathogen infection and establishment are not expressed differentially with regard to variety. Likewise, there is no apparent differential response of the pathogens to those host factors determining the degrees of resistance and symptoms expressed in different varieties.

Additional key words

common scab