Mycopathologia et mycologia applicata

, Volume 38, Issue 3, pp 209–213 | Cite as

Genetics of phytopathogenic fungi XIX. Responses of four apple varieties to inoculation with auxotrophic mutants of Penicillium expansum

  • Louis Beraha
  • Edward D. Garber
Article
  • 23 Downloads

Summary

Variations in content and/or availability of the amino acids methionine, cysteine, arginine, leucine, and histidine in the apple varieties, Jonathan, McIntosh, Red Delicious, and Golden Delicious influence the fruit's susceptibility to amino acid-dependent mutants ofPenicillium expansum. Differences among these varieties in the levels of several vitamins, or of the purines, adenine, or hypoxanthine, do not alter susceptibility. The growth in vitro of 7 arginine-requiring mutants at 1×10−4 M arginine and the decay they cause in apples were directly correlated.

Keywords

Cysteine Arginine Methionine Histidine Leucine 

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References

  1. Beraha, L. &Garber, E. D. 1965. Genetics of Phytopathogenic Fungi XI. A genetic study of avirulence due to auxotrophy inPenicillium expansum by means of the parasexual cycle. Amer. J. Bot.52 117–119.Google Scholar
  2. Beraha, L. &Garber, E. D. 1966. Genetics of Phytopathogenic Fungi XV. A genetic study of resistance to sodium orthophenylphenate and sodium dehydroacetate inPenicillium expansum. Amer. J. Bot.53 1041–1047.Google Scholar
  3. Garber, E. D. 1956. A nutrition-inhibition hypothesis of pathogenicty. Amer. Natur.90 183–194.Google Scholar
  4. Hulme, A. C. 1958. Some aspects of the biochemistry of apple and pear fruits. Adv. Food Res.8 297–413.Google Scholar
  5. Mac Neill, B. H. &Barron, G. L. 1966. Avirulence in prototrophs ofPenicillium expansum. Canad. J. Bot.44 355–358.Google Scholar

Copyright information

© Dr. W. Junk N.V. 1969

Authors and Affiliations

  • Louis Beraha
    • 1
    • 2
  • Edward D. Garber
    • 1
    • 2
  1. 1.Market Quality Research Division, Agricultural Research ServiceUnited States Department of AgricultureChicago
  2. 2.Department of BiologyUniversity of ChicagoChicago

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