Abstract
This paper deals with the suitable storage conditions for green leaves of perilla and flower buds of mioga.
[Green leaves of perilla]
Gas concentrations in non-perforated polyethylene bags containing green leaves of perilla were highest in carbon dioxide and lowest in oxygen through storage period at 20°C compared with the concentrations at 1, 5 or 10°C. For about the first 4 days of storage, the concentration of carbon dioxide in the bags increased as the storage temperature increased, but the oxygen concentration decreased. Ethylene concentration in the bags was also highest at 20°C. Dull leaf color which was attributed to chilling injury was identified on the leaves stored at 1°C in both the non-perforated and perforated polyethylene bags after 7 days, and this symptom became more conspicuous after 10 days. Decay was observed on the leaves stored in the both non-perforated and perforated bags after 7 or more days of storage at 20°C. Quality was maintained relatively well at 5 and 10°C. Chlorophyll content did not change for 12 days in any storage condition. Total ascorbic acid content decreased gradually in all storage conditions but there was no significant difference among the various conditions.
[Flower buds of mioga]
Carbon dioxide concentration in non-perforated polyethylene bags containing flower buds of mioga increased as the storage temperature increased, but oxygen concentration decreased. The ethylene concentrations in the bag ranged from 0.1 to 0.2μl/l. From the values of a, a/b, and √a2+b2 of external surface on the flower buds measured by color meter throughout the storage period, it indicates that the degree of green color on the surface increased and the degree of red color and chroma tended to decrease under all storage conditions. Organoleptic test showed that the flower buds of mioga were kept at marketable quality for 6 days at 1°C, for 4 days at 10°C and for 2 days at 20°C.
