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Reducing the incidence of under-skin browning in 'Honey Gold' mango (Mangifera indica L.) fruit

Marques, J. R. and Hofman, P. J. and Giles, J. E. and Campbell, P. R. (2012) Reducing the incidence of under-skin browning in 'Honey Gold' mango (Mangifera indica L.) fruit. Journal of Horticultural Science & Biotechnology, 87 (4). pp. 341-346. ISSN 1462-0316

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Publisher URL: http://www.jhortscib.org/Vol87/87_4/9.htm

Abstract

'Honey Gold' mango is a relatively new cultivar in Australia, with an appealing skin colour and a sweet fibre-free flesh. However, fruit can develop 'under-skin browning' (USB), which appears several days after packing as a distinct 'bruise'-like discolouration under the epidermis and can affect large areas of the fruit surface. We investigated the anatomy of USB and the impact of post-harvest fruit handling conditions on the disorder. Starch accumulated around the resin canals and discoloured cells in the affected area, with no visible change to the cuticle or epidermis. Delays of 1 d at ambient temperature (27 degrees - 35 degrees C) before packing, and 2 d at 18 degrees - 20 degrees C (after packing), before placing fruit at 12 degrees - 14 degrees C and road transportation, reduced the incidence of USB by 83% compared to placing fruit at 12 degrees - 14 degrees C within 13 h of picking. The incidence of USB was 88 100% higher in fruit that were cooled to 12 degrees - 14 degrees C within 13 h of picking, then commercially road-freighted for 4 d at 12 degrees - 14 degrees C, than in fruit held under similar temperature conditions, but not road-freighted. Wrapping each fruit in bubble-wrap to minimise direct contact with other fruit, with the plastic insert, or with the cardboard tray, reduced the incidence of USB by 84% after road-freight compared to not using bubble-wrap. These results suggest that USB is a unique disorder of mango skin associated with a rapid post-harvest reduction in temperature, from high ambient temperatures to 12 degrees - 14 degrees C, and with physical damage during road-freight.

Item Type:Article
Business groups:Horticulture and Forestry Science
Additional Information:We thank Horticulture Australia Ltd., Piñata Marketing Pty Ltd., and the Department of Employment, Economic Development and Innovation (Queensland) for funding (through Project No. MG06022). Barbara Stubbings, Ted Winston, Leanne Taylor, and Chelsea Moore are also thanked for their technical assistance, and growers for access to their orchards.
Subjects:Plant culture > Fruit and fruit culture
Plant culture > Harvesting, curing, storage
Deposited On:04 Sep 2013 01:45
Last Modified:08 Aug 2017 15:00

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