Korean journal of food and cookery science (한국식품조리과학회지)

Korean Society of Food and Cookery Science (한국식품조리과학회)
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Changes in glycoalkaloid contents of 'Superior' potato tubers by storage

저장에 의한 감자(수미)의 Glycoalkaloid 함량의 변화

  • Kim, Joung-Ae (Division of Food Service Industry, Uiduk University)
  • 김정애 (위덕대학교 외식산업학부)
  • Published : 2007.04.30
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Abstract

The purpose of this study was to examine how potato glycoalkaloid(PGA) contents changed as storing temperatures and periods changed for potatoes(Superior) cultivated in Korea. Some potatoes were stored at $5^{\circ}$C for 80 days, and others were stored at $20^{\circ}$C for 40 days. PGA contents were measured every 20 days for the potatoes stored at $5^{\circ}$C and 10 days for those stored at $20^{\circ}$C. 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 $5^{\circ}$C 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 $20^{\circ}$C showed faster sprout growths and faster increases in PGA content than those stored at $5^{\circ}$C.

저장에 따른 감자의 glycoalkaloid(PGA)의 함량 변화를 알아보기 위하여 국내에서 재배된 수미 감자를 사용하여 $5^{\circ}$C와 $20^{\circ}$C의 항온실에 저장한 후, $5^{\circ}$C 저장 감자는 20일 간격으로 80일 동안을, $20^{\circ}$C는 10일 간격으로 40일 동안 감자의 glycoalkaloid 함량을 측정한 결과는 다음과 같다. 저장 당일 감자의 a-chaconine과 a-solanine의 함량은chaconine이 54.22 mg/100 g 으로 solanine의 26.57 mg/100 g의 약 2배의 함량을 나타내었다. $5^{\circ}$C에서 저장된 감자의 싹의 성장은 20일째 0.4 cm의 발아를 보여 40일째는 1 cm, 60일째 1.8 cm 정도인 것이 이후에 많은 증가를 보여 80일에는 5.2 cm의 신장을 나타내었다. PGA 함량은 시간이 지남에 따라, 저장 당일에 비해 20일에는 3.5%, 40일에는 11.6%, 60일에는 23.4%, 80일에는 41.4%의 증가를 보였다. $20^{\circ}$C에 저장한 감자의 싹은 10일째에 0.5 cm로 발아하였으나 20일째에 2.3 cm, 40일에 7.4 cm로 급속한 싹의 신장을 보였다. PGA의 변화는 저장 당일에 비해 10일에 12.5%, 20일에는 36.6%, 30일에는 44.8%, 40일에는 48.4%의 증가를 나타내었다. 즉, 저장 온도와 기간에 따른 PGA함량은 $5^{\circ}$C의 저온에서 저장한 감자는 $20^{\circ}$C에서 저장한 감자보다 발아의 지연과 함께 낮은 PGA증가율을 보였다.

Keywords

References

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