Highlights
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Wound response is an important factor in the resistance of apples to Penicillium expansum and Penicillium digitatum.
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Wound response in apples was slower at 0 °C than at 20 °C.
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P. digitatum was able to develop rots in over-mature apples.
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Lignin formation seems to be involved in apple wound response.
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Immature fruit were more resistant than commercially mature and over-mature fruit.