Abstract

This study was carried out to investigate proper modified atmosphere condition of king oyster mushroom (Pleurotus eryngii) during cold storage and distribution. King oyster mushrooms were divided into two treatments: $1{\mu}L/L$ 1-methylcyclopropene for 20 hours at $0^{\circ}C$ (1-MCP), while the other treatment was left at $0^{\circ}C$ (control). They were packaged with $30{\mu}m$ oriented polypropylene (OPP, $1238.0cc/m^2{\cdot}day{\cdot}atm\;O_2$), and microperforated (MP3, $3179.9cc/m^2{\cdot}day{\cdot}atm\;O_2$) film. Quality and sensory evaluation parameters of weight loss, stem firmness, skin color, off-flavor, overall quality were monitored after 3, and 4 weeks storage at $0^{\circ}C$ and plus 3 days on the shelf at room temperature. 1-MCP treated mushroom packaged with MP3 film kept 3.6~10.9% $O_2$ and 9.0~13.3% $CO_2$ concentration in the bag during storage, and showed high overall quality at 4 weeks storage at $0^{\circ}C$ + 3 days on the shelf at room temperature because of the lowest development of off-flavor, stem discoloration, and cap softening among the treatments.

수확후 큰느타리버섯의 3주 이상 저온 저장 및 유통 중 품질 유지를 확보하기 위하여 포장 내부의 적정 산소와 이산화탄소 농도를 유지하는 MAP 기술적용 체계를 확립하고자 하였다. 이를 위하여 $1{\mu}L/L$ 1-methylcyclopropene (1-MCP, 20시간, $0^{\circ}C$)을 처리하고 방담성 $30{\mu}m$ oriented polypropylene(OPP, $1238.0cc/m^2{\cdot}day{\cdot}atm\;O_2$)필름과 미세천공(MP3, $3179.9cc/m^2{\cdot}day{\cdot}atm\;O_2$)필름으로 포장한 후 $0^{\circ}C$에 저장 3주, 4주 저장 후 3일 상온유통을 실시하고 큰느타리버섯의 색도, 경도, 이취 등 품질변화를 관찰하였다. 1-MCP 처리 후 미세천공필름 포장에 의해서 저장 기간 동안 포장재 내 산소 농도 3.6~10.9%, 이산화탄소 농도 9.0~13.8% 수준이 유지되었으며 4주 저장 + 3일 상온유통 후 무처리 OPP필름보다 갓무름과 갈변, 이취 발생이 적어 상품성을 유지하였다.

Keywords

• Pleurotus eryngii;
• Shelf life;
• Storage