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KMID : 1011620070230020245
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Korean Journal of Food and Cookey Science
2007 Volume.23 No. 2 p.245 ~ p.251
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Changes in glycoalkaloid contents of ’Superior’ potato tubers by storage
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김정애:Kim Joung-Ae
저자없음:No authors listed
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Abstract
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The purpose of this study was to examine how potato gIycoalkaloid(PGA) contents changed as storing temperatures and periods changed for potatoes(Superior) cultivated in Korea. Some potatoes were stored at 5℃ for 80 days, and others were stored at 20℃ for 40 days. PGA contents were measured every 20 days for the potatoes stored at 5℃ and 10 days for those stored at 20℃. The results can be summarized as follows. The amounts of a-chaconine and a-solanine measured on the first day of storage were 54.22 mg/100 g and 26.57 mg/100 g, respectively. Thus, the a-chaconine content was almost twice as much as the a-solanine content. The sprouts of potatoes stored at 5℃ grew by 0.4 cm in 20 days, 1 cm in 40 days, 1.8 cm in 60 days, and 5.2 cm in 80 days. Furthermore, the PGA content increased by 3.5% in 20 days, 11.6% in 40 days, 23.4% in 60 days, and 41.4% in 80 days, compared to the PGA content on the first day. The sprouts of potatoes stored at 20 grew by 0.5 cm in 10 days, 2.3 cm in 20 days, and 7.4 cm in 40 days. Furthermore, PGA content increased by 12.5% in 10 days, 36.6% in 20 days, 44.8% in 30 days and 48.4% in 40 days, compared to the PGA content on the first day. Thus, we determined that potatoes stored at 20°C showed faster sprout growths and faster increases in PGA content than those stored at 5℃.
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KEYWORD
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Potato glycoalkaloid, storing temperature, a-chaconine, a-sdanine
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