Influence of O_2 transmission rate through perforated pouches and storage temperature on in-package atmosphere and quality of light red tomuto fruits

摘要

One or two vine-ripe tomato fruits (Lycopersicum esculentum Mill., cv. Momotaro) at light red stage were enclosed in a pouch (O_2 transmission rate: 0.05 or 0.25 mmol·m~(-2)·h~(-1)·kPa~(-1), 15℃) and stored at 15 or 30℃. In-package O_2, CO_2 and C_2H_4 concentrations were measured and the softening of fruits were investigated during storage. In-package CO_2 was higher than that in the published reports on the modified atmosphere packaging with tomato fruits. This is caused by that there was little difference between O_2 and CO_2 transmission rates of perforated pouches different from the non-perforated film pouches. Softening of the fruit packaged in the 0.25 mmol·m~(-2)·h~(-1)·kPa~(-1) O_2 transmission rate pouch stored at 15℃ was the slowest in the current study.%熟度ステージがLight redの完熟トマト果実（Lycopersicum esculentum Mill.,品種：桃太郎）をO_2移動速度0.05または0.25mmol・m~(-2)・h~(-1)・kPa~(-1)（15℃）の微細孔フィルムにより1袋当たり1または2個包装して15及び30℃で貯蔵し、経時的に袋内O_2、CO_2及びC_2H_4を測定するとともに、果実品質を調査した。過去のトマト果実を包装した研究例に比べて袋内CO_2濃度が高くなる傾向がみられた。これは、通常のプラスチック袋と異なり、O_2移動速度とCO_2移動速度の間にほとんど差が無い特徴を有するためである。本研究では、0.25mmol・m~(-2)・h~(-1)・kPa~(-1)の微細孔フィルムにトマト果実を1個入れ、15℃で貯蔵したトマト果実の軟化が抑制された。