Effects of temperature on postharvest respiratory parameters and quality attributes of ackee (Blighia sapida Köenig) fruit arils during storage
2018
Benkeblia, N. | Beaudry, R. M.
The effect of temperatures on the rate of O2 uptake (RRO2) and CO2 production (RRCO2), the Q10 and activation energy (Ea) of respiration, the respiratory quotient (RQ), the rate of ethylene production, the colour and visual quality attributes of ackee (Blighia sapida Köenig) fruit arils “cheese” variety were measured. RRO2 averaged 0.26, 0.63, and 0.96 mmol kg-1 h-1 and RRCO2 averaged 0.22, 0.55, 0.90 mmol kg-1 h-1 and ethylene production averaged, 47.5, 50.2 and 51.9 nmol kg-1 h-1 at 5, 15 and 25°C, respectively. Neither RRO2 nor RRCO2 correlated with ethylene production. The RQ of arils varied from 0.89 to 1.0 and the Q10 varied from 1.8 to 2.0, while the Ea ranged from 40.4 to 51.6 kJ mole-1. Decay and quality loss were rapid at temperatures above 15°C. When kept under chilling temperature (3°C for 20 days with or without subsequent removal to 25°C), ackee arils showed severe chilling injury symptoms. Decay was also accelerated by the removal to 25°C. Collectively, the data indicate that ackee fruit aril storage is limited to temperatures between 5°C and 15°C.
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