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Postharvest light affects colour development Rome’ apples

J.B. Golding, A. Beckwith, A. Cameron, and D.R. Dilley

Proceedings of 26th International Horticultural Congress. Volume of Abstract . Toronto, Canada, 11-17 August, 2002. Abstract S09-P-107. pp. 251.

2002

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Postharvest Light Affects Colour Development Rome' Apples

Red color is an important component of consumer acceptance of apples and is primarity a result of consumer acceptance of apples and is primarily a result of anthocyanins. We examined the effects of postharvest light quantity on the postharvest development of peel color. ‘Rome’ apples were bagged in the orchard during summer to obtain physiologically mature but anthocyanin-free. Postclimacteric bagged fruit were harvested, and exposed to a gradient of light quantity from 0.5 to 50 uM.m-2 .s-1 at 20 C. The light source was continuous illumination with two 15 Watt cool white fluorescent lights. Color development was recorded every 2 days during storage. Color was correlated to anthocyanin production. The results showed that the quantity of light perceived by the apple peel is a strong determinant of color development. Apples receiving the most light produced the most anthocyanin, and in the quickest time. We related the rate of color change to the total level of lingt delivered. The results and implications of this experiment will be discussed in more detail.