Potato Research

, Volume 41, Issue 2, pp 143–153 | Cite as

Light induced bio-control of potato storage pathogens in vitro

  • G. C. Percival
  • M. S. Karim
  • G. R. Dixon
Full Papers

Summary

The influence of freeze dried potato powder derived from tubers (cvs Désirée and Epicure) exposed to light as a culture medium on the growth, number and spore size of nine fungal pathogens was determined in vitro with particular emphasis on the role of glycoalkaloids. Greater reductions in pathogen growth reflected increased exposure to light of tubers prior to freeze drying. High correlations (% R2 adj) were obtained between glycoalkaloid concentration and growth rate of the majority of pathogens tested. Where spores were produced, numbers were in general significantly less when cultured on freeze dried powder derived from tubers exposed to light. No effects on spore size ofFusarium species were recorded, but spore length of remaining pathogens was reduced and spore width increased, with the exception ofC. coccodes where spore length and width was increased following culture onto freeze dried powder derived from tubers exposed to light.

Additional keywords

resistance Solanum tuberosum L. cultivars glycoalkaloids 

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Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • G. C. Percival
    • 1
  • M. S. Karim
    • 2
  • G. R. Dixon
    • 3
  1. 1.Department of Plant BiologyUnit of HorticultureAyrUK
  2. 2.Technical DirectorEuro-Continental Developments LimitedDublin 8Ireland
  3. 3.Department of Bioscience and BiotechnologyUniversity of StrathclydeGlasgowUK

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