Influence of exogenouse thylene on the ripening of Harumanis mango

A.R. Abd. Shukor, H. Abdullah and O. Ahmad Shokri

Abstract

Mas banana of 7 weeks maturity were exposed to 0,0.35,5. 10 and 20μ L/L exogenouse thylene for24 hunder a continuous-flow-through systema t25°C and95-100% relative humidity. Following ripening induction. the fruit were allowed to ripen at 25°C and 85-90% relative humidity until the peel colour attained colour score 6. An exogenous ethylene concentration of 0.35µ L/L is enough to stimulate peel colour change and enhance the onset of respiratory climacteric peak. Exogenous ethylene-treated fruit attained colour score 6 after 3 days of induction while control fruit were still at colour score 2. In comparing with other concentrations, fruit exposed to 0.35µ L/L exhibited a slightly slower change in peel colour. Exogenous ethylene concentration exceeding 5µ L/L does not further enhance the peel colour change. The carbon dioxide and ethylene production of ethylene-treated fruit showed a decreasing trend after the ripening induction period. Changes in pH, total soluble solids and total sugar content between air and ethylene-ripened fruit at colour score 6 were insignificant.

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