Effects of seed germination on oil oxidation and tocopherol stability of perilla oil.

摘要

Auto- and photooxidative stability of oil extracted from germinated perilla seeds during storage at 60 degrees C for 4 days was studied by determining peroxide and conjugated dienoic acid values. Tocopherol contents during oil oxidation were also monitored by HPLC. Perilla oil was oxidized and tocopherols were degraded during storage at 60 degrees C regardless of the presence of light. Light increased oil oxidation and tocopherol degradation. Seeds germinated for 12 h had increased tocopherol contents in the oil which improved the auto- and photooxidative stability of the perilla oil. Tocopherol played a more important role as an antioxidant in the presence of light than in the absence of light.