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Postharvest light treatments increase skin blush in mango fruit

Cao, S. F. and Zhang, Y. and Yu, X. and Braun, C. and Harrison, D. and Joyce, D. C. and Hofman, P. J. (2016) Postharvest light treatments increase skin blush in mango fruit. In: Acta Horticulturae.

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Article Link(s): http://dx.doi.org/10.17660/ActaHortic.2016.1111.57

Abstract

Skin colour is an important quality parameter that influences mango fruit marketability. The mango industry is interested in controlled induction of skin blush in mangoes. It is desirable to understand the control of anthocyanin accumulation in mango skin. Among environmental factors known to induce anthocyanin accumulation in plants, light is the most studied. Light exposure induces pigmentation in various fruits, including apple, strawberry and grape. The effect of different light qualities on skin blush in mango fruit has received relatively little attention. The objective of this study was to assess anthocyanin accumulation and blush in response to blue, red and far red light from light-emitting diodes (LEDs) as applied to harvested mango fruit skin during storage at 12°C. Except for red light, the other wavelengths induced anthocyanin accumulation and skin blush as compared to the dark control treatment. Anthocyanin concentration and a∗ values were highest in blue light exposed fruit skin. This wavelength enhanced phenylalanine ammonia lyase activity in the mango skin, which may be associated with increased pigmentation. LED light treatment did not affect other fruit quality parameters at 21 days of storage, including firmness, total soluble solids and titratable acidity. Overall, the findings suggest that postharvest treatment with blue light can induce skin blush in mango fruit, which potentially may enhance their commercial value.

Item Type:Conference or Workshop Item (Paper)
Business groups:Horticulture and Forestry Science
Keywords:Anthocyanin LED light Mango Quality Skin colour
Subjects:Plant culture > Harvesting, curing, storage
Plant culture > Fruit and fruit culture > Culture of individual fruits or types of fruit
Deposited On:22 Jul 2016 05:09
Last Modified:17 Aug 2016 04:50

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