Patulin from Penicillium expansum in Stone Fruits and Pears1

in Journal of the American Society for Horticultural Science
Authors:
J. R. BuchananUniversity of California, Davis

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N. F. SommerUniversity of California, Davis

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R. J. FortlageUniversity of California, Davis

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E. C. MaxieUniversity of California, Davis

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F. G. MitchellUniversity of California, Davis

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D. P.H. HsiehUniversity of California, Davis

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Abstract

Concentrations of patulin in blue mold lesions caused by Penicillium expansum Lk. ex Thom in pears and stone fruits were similar to those reported for apples. Of fruits tested, only the plum was a poor substrate for accumulation of the mycotoxin. The total patulin within disease lesions increased as the lesions enlarged. However, the concentration of patulin varied considerably, with the largest lesions usually yielding the lowest concentrations. Little or no patulin permeated healthy tissue surrounding the disease lesions unless fruits were overripe or had senescent breakdown.

Contributor Notes

Received for publication November 2, 1973.

Department of Pomology.

Department of Environmental Toxicology.

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