Abstract
The mechanism of autocatalytic ethylene production was studied in relation to kiwifruit ripening.1. Ethylene production by kiwifruit was induced by 18- and 24-hr ethylene treatments at 20 °C. On the other hand, the other physiological changes associated with ripening were accelerated even by 15-hr or less.2. The physiological changes such as flesh softening, decrease in acid content and increase in respiration rate were appreciably accelerated by 0.1 to 10 ppm of ethylene at 5 °C, while ethylene production, ACC (1-aminocyclopropane-l-carboxylic acid) accumulation and EFE (ethylene forming enzyme) activity were not stimulated by those conditions.Hence, it is concluded that autocatalytic ethylene production in kiwifruit is less inducible with ethylene treatment than most physiological changes relating ripening.
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