Genetics of phytopathogenic fungi XIX. Responses of four apple varieties to inoculation with auxotrophic mutants of Penicillium expansum
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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.
KeywordsCysteine Arginine Methionine Histidine Leucine
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