Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Pyruvic Acid and Sugar Contents during Storage Duration in Onion (Allium cepa L.)

양파 저장 중의 Pyruvic Acid와 당 함량의 변화

  • Lee, Eun-Ju (Electronics and Telecommunications Research Institute (ETRI)) ;
  • Jeon, Jae-Kyung (Department of Horticultural Science, Kyungpook National University) ;
  • Suh, Jun-Kyu (Department of Horticultural Science, Kyungpook National University)
  • Received : 2010.11.10
  • Accepted : 2010.12.10
  • Published : 2010.12.31
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Abstract

This study was carried out to access the stauts of pyruvic acid and sugars in onion bulbs during storage at room temperature. Pyruvic acid content remained in a steady state until 3 months of storage. However the pyruvic acid content gradually increased as the onions started to root, and rapidly increased after sprouting. There was no difference in dry matter contents during storage.e. Sucrose content increased as storage duration extended, and then gradually decreased right after the onions started to sprout. Fructose content gradually decreased after 45 days of storage, and remained in a steady state after sprouting. Glucose content had a tendency to increase as storage duration extended. Pyruvic acid/total sugar (PA/TS) ratio decreased after 1 month of storage, and then increased after 135 days, and was 83% higher at 150 days of storage than at harvest. Sweetness gradually decreased until 1 month of storage, but thereafter remained steady. Therefore it is desirable that pyruvic acid analysis for sweet onion selection should be conducted before breaking the dormancy.

본 연구는 저장 기간 중 양파 구의 pyruvic acid와 당 함량의 변화를 분석하고자 한다. 저장 중의 pyruvic acid 함량은 저장 3개월까지는 큰 변화가 없었으나 저장 120일경부터 발근이 시작되면서 서서히 증가하기 시작하여 맹아기 이후 급격히 증가하였다. 그와 대조적으로 건물함량은 저장 기간 동안 큰 변화가 없었다. Sucrose 함량은 저장기간이 경과할수록 증가하다가 맹아가 진행됨에 따라 감소하였다. Fructose 함량은 저장 45일째 이후로 서서히 감소하여 맹아기 이후에는 큰 변화가 없었다. Glucose 함량은 저장기간이 경과할수록 증가하는 경향이었다. 저장기간 중 총당(TS) 함량에 대한 pyruvic acid(PA) 함량 비율(PA/TS ratio)은 수확시에 비해 저장 한 달 이후부터 감소하였으며, 이 후 내부맹아가 관찰되는 135일째부터 급격하게 증가하여 저장 150일에는 수확시에 비해 83% 정도 증가하였다. 저장기간 중 감미도는 저장 한 달 까지는 서서히 감소하였으나 그 이후 증가하였고, 저장기간 중 큰 변화가 없었다. 따라서 단 양파 선발은 휴면이 타파되기 전에 실시하는 것이 바람직할 것으로 생각된다.

Keywords

References

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