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  • Title: Effects of long-term storage on Mal d 1 content of four apple cultivars with initial low Mal d 1 content.
    Author: Kiewning D, Schmitz-Eiberger M.
    Journal: J Sci Food Agric; 2014 Mar 15; 94(4):798-802. PubMed ID: 24130074.
    Abstract:
    BACKGROUND: Up to 6.6% of adults and 11.5% of children aged between 0 and 6 years are reporting a perceived fruit allergy. In the last group 8.5% perceived reactions against apple. To keep allergic reactions as low as possible and to make apple consumption more tolerable for patients allergic to apple, the Mal d 1 content of four apple cultivars ('Boskoop', 'Elise', 'Pinova', 'Santana' and 'Topaz') were analyzed, to identify apple cultivars with only a low Mal d 1 content. Further, the development of Mal d 1 content of low-allergenic cultivars should be investigated during long-term storage. RESULTS: The lowest Mal d 1 content was measured for fruits of the cultivar 'Santana' at harvest, followed by 'Pinova' and 'Elise' after storage without 1-MCP. Nearly all fruits treated with 1-MCP had a significantly lower Mal d 1 content than fruits without 1-MCP, except for 'Boskoop' fruits after 44 weeks of storage. Apple cultivars with a low Mal d 1 content are not a cross of 'Golden Delicious' with another cultivar, with the exception of 'Pinova' which is a cultivar from the so-called 'Pi-series', which have a moderate resistance to scab and mildew. First experiments on tomatoes and peanuts have shown a reduction of allergic proteins in older and child generations after transfer of RNA. This reduction is probably based on an alteration of gene expression regulating the synthesis of allergic proteins, leading to changes in protein composition in the fruit. CONCLUSION: Individuals allergic to apple should choose the described cultivars with relative low Mal d 1 content. If breeders want to breed cultivars with low allergy, they should avoid crossings with 'Golden Delicious'.
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