Influence of Temperature Stress on Color Development, Respiration Rate, and Physiological Injury in Harvested Tomato

概要

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Mature green tomatoes (Lycopersicon esculentum M. cv. saturn) were stored in air with and without ethylene (C_2H_4) treatment (100ppm) at 5, 10, 15, 20, 25, 30, 35, and 40℃. Breaker and light pink tomatoes were stored at 25, 30, and 35℃ without C_2H_4. During storage, respiration rate, C_2H_4 production and color development were measured and found to be suppressed at 35℃ even though the tomatoes did not show heat injury. At 40℃, there was no disappearance of green on the surface of tomatoes and no significant C_2H_4 production with high respiration rates. Exogenous C_2H_4 increased respiration rate at all temperatures; however, color development was insufficient above 30℃ and below 10℃. C_2H_4 accelerated chilling injury at 5 and 10℃ and heat injury at 40℃ as indicated by rapid decay. Tomatoes stored with or without C_2H_4 showed one breaking point about the same temperature between 10 to 15℃ on respiration Arrhenius plots. As tomato maturity proceeded, respiration maximum, the variance in respiration rates and C_2H_4 production at 35℃ increased indicating that sensitivity to high temperature stress was increasing with ripening. Carotenoids accumulation in detached tomatoes of cv. Raiko during ripening was almostsame extent to that of attached fruit under temperature fluctuation in the field and between 20℃ and 35℃ at one day interval.
大阪府立大学の論文
1996-03-31