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Effect of Nitrous Oxide (N2O) Treatment on Quality of Peach (Prunus persica) Postharvest

복숭아(Prunus persica) 수확 후 아산화질소(N2O) 처리가 품질에 미치는 영향

  • Nah, Hyun-Seok (Food R&D Institute, CJ CheilJedang Corporation) ;
  • Bae, Ro-Na (Analysis & Certification Division, Foundation of Agri. Tech. Commercialization & Transfer) ;
  • Lee, Seung-Koo (Department of Plant Science, Seoul National University)
  • Received : 2011.05.24
  • Accepted : 2011.10.13
  • Published : 2012.02.29

Abstract

This experiment was conducted to find out the effects of nitrous oxide ($N_2O$) on the postharvest quality of 'Janghowon hwangdo' peach fruits. Fruits were harvested at commercial maturity for marketing in late September, and treated with 70% $N_2O$ + 20% $O_2$ + 10% air, 80% $N_2O$ + 20% $O_2$, and 90% $N_2O$ + 10% $O_2$ for 48 h, and then stored at $15^{\circ}C$. No significant treatments for soluble sugar and titratable acidity contents were detected. However, good appearance and taste in peach fruit were maintained better in 80% $N_2O$ treatment than in air treatment. The treatment with 90% $N_2O$ had negative effects on weight loss and taste because of rotting by anaerobic fermentation. 80% $N_2O$ treated fruit had significantly higher fungus (Botrytis cinerea) growth inhibition of saprogenic approximately than air treatment until 12 days of storage. The browning and rotting at surface of peach were also retarded when peaches were treated with 80% $N_2O$ before they were artificially wounded. The activity of polyphenol oxidase (PPO) was inhibited about 80% in peach of 80% $N_2O$ treatment compared with in air treatment. The result showed that 80% $N_2O$ treatment was able to extend the shelf life of peach fruits through maintaining taste and inhibition of softening and browning by rotting and wounding during storage.

아산화질소($N_2O$)가 원예 작물의 저장 중 품질에 미치는 영향을 알아보기 위하여 9월 하순에 수확된 '장호원 황도' 복숭아를 대상으로 연구를 수행하였다. $N_2O$ 처리는 70% $N_2O$ + 20% $O_2$ + 10% air, 80% $N_2O$ + 20% $O_2$, 그리고 90% $N_2O$ + 10% $O_2$의 3가지 농도로 48시간 동안 처리하였으며 처리 후 $15^{\circ}C$에서 저장하였다. 경도와 당도의 변화는 air(대조구) 및 $N_2O$ 처리간 뚜렷한 차이가 없었으나, 외관 변화 및 식미에 있어서는 80% $N_2O$를 48시간 동안 처리한 것이 처리하지 않았을 때보다 뚜렷한 품질 유지 효과를 보였다. 90% $N_2O$를 처리하였을 때에는 산소 부족으로 인한 발효로 중량 감소와 식미가 오히려 악화되는 양상을 나타내었다. 복숭아의 주된 부패 원인이 되는 잿빛곰팡이(Botrytis cinerea)를 분리하여 80% $N_2O$를 처리하였을 때 air에 비해 곰팡이 성장이 12일까지 약 80% 억제되었다. 복숭아의 타박상이 생긴 부분의 갈변 방지 억제 효과를 알아보기 위해 80% $N_2O$를 처리하고 타박상을 입혔을 때에, 타박상 부분의 갈변이 air에 비해 억제되었으며, 과실로부터 추출한 polyphenol oxidase(PPO)에 80% $N_2O$를 처리한 결과 PPO의 활성이 80% 이상 억제되었다. 80% $N_2O$ 처리는 복숭아 저장 중 식미를 유지시키고, 부패와 타박상에 의한 연화 및 갈변을 억제하는 것으로 품질을 유지시켜 저장 기간을 연장시킬 수 있었다.

Keywords

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