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Effect of low‐temperature storage on the content of folate, vitamin B 6 , ascorbic acid, chlorogenic acid, tyrosine, and phenylalanine in potatoes
Author(s) -
Goyer Aymeric,
Picard Maël,
Hellmann Hanjo A,
Mooney Sutton L
Publication year - 2019
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.9750
Subject(s) - chlorogenic acid , ascorbic acid , phenylalanine , tyrosine , vitamin c , chemistry , food science , vitamin , composition (language) , horticulture , biology , biochemistry , amino acid , linguistics , philosophy
BACKGROUND Changes in the metabolite composition of potato tubers during low‐temperature storage can affect their nutritional value, susceptibility to bruising, and processing qualities. Here, we measured changes in the amounts of folate, vitamin B 6 , and vitamin C, and the blackspot pigment precursors chlorogenic acid and tyrosine, as well as phenylalanine, in five potato varieties stored at 7.8 °C for 8 months in 2015 and 2016. RESULTS Folate content increased in all varieties in both years during low‐temperature storage, with statistically significant changes occurring in six out of eight conditions. Increase rates ranged from 11% to 141%. Vitamin B 6 content increased in all varieties during the storage period, but changes were statistically significant in only two out of eight conditions. Increase rates ranged from 5% to 24%. Ascorbic acid content decreased in all varieties in both years during the storage period. Decrease rates ranged from 16% to 78%, and were statistically significant in seven out of eight conditions. For chlorogenic acid, no consistent trend was observed. Changes varied between −14% and +14%, but none was statistically significant. Tyrosine content increased in all varieties in both years, except in Sage Russet in 2015. Increase rates ranged from 19% to 238% and were statistically significant in three out of seven conditions. Changes in phenylalanine content were very similar to those observed for tyrosine, with increases up to 272% in Teton Russet. CONCLUSIONS These results show that storage at low temperature substantially affects tuber nutritional quality and biochemical bruising potential. © 2019 Society of Chemical Industry