ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Influence of temperature and light in fruit color developing of A. macrosperma

Montefiori M., Costa G., McGhie T., Ferguson R.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004. page 12

2004

บทคัดย่อ

Actinidia macrosperma is a species characterized by a bright orange colour of the flesh of ripe fruits.The colour can change o­n the vine or during the post-harvest period.The colour change is due to chlorophyll degradation and new synthesis of carotenoids.Different storage conditions, as temperature and light can influence the colour of the flesh of the fruits of this species.

To demonstrate this hypothesis, green fruits were collected and stored at low temperature and different light regimes (continuous light or dark), while other fruits were stored at room temperature under the same light.The fruits maintained at room temperature turned orange quickly, independent of light exposure.Fruits maintained at low temperature colored slowly, and their colour never became bright orange (hue angle 105.2) instead.On the other hand, fruit maintained at room temperature quickly turned to bright orange.In conclusion, during post-harvest the fruit colour seems to be more influenced by temperature than light.From these results it is possible to hypothesize that carotenoid biosynthesis is directly influenced by storage temperature.In fact, while temperature always affects chlorophyll degradation at different rates, related to the temperature values reached, carotenoid biosynthesis is completely blocked at the temperature nominally used in cool storage conditions.