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Characterisation and induction of 'etch' browning in the skin of mango fruit

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O'Hare, T. J., Bally, I. S.E., Dahler, J. M., Saks, Y. and Underhill, S. J. R. (1999) Characterisation and induction of 'etch' browning in the skin of mango fruit. Postharvest Biology and Technology, 16 (3). pp. 269-277. ISSN 09255214 (ISSN)

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Article Link: https://doi.org/10.1016/S0925-5214(99)00030-7


The effects of detergents and mango sap on the development and anatomy of 'etch', a physiological skin disorder in mango (Mangifera indica L.) fruit, were examined. Etch was associated with a higher number of cracks in the cuticle than occurred in healthy tissue. Etch was induced on fruit dipped in the wetting agent Agral® at high concentrations (10, 50% v/v). Fruit kept in contact with pads saturated with low concentrations of detergents (Agral®, 0.1-1%; Amway LOC®, 0.1%) tended to develop etch at the perimeter of the contact area. Etch symptoms increased in severity with fruit ripening and increasing contact times with detergent. Lenticel spotting developed at lower detergent concentrations than were required for etch development. The oil, white oil/aqueous and blue lower aqueous components of mango sap were separated and applied to the skin of mangoes. No individual component resulted in more than mild perimeter etch. A 10:90 ratio of oil:aqueous fraction resulted in etch symptoms of moderate severity over the entire application area, but only when combined in wet contact with water or Agral®. The relevance of the results to mango postharvest handling systems is discussed.

Item Type:Article
Business groups:Horticulture and Forestry Science
Keywords:Cell damage Detergents Lenticel spotting Mangifera Sapburn Skin browning Smear Mangifera indeca
Subjects:Plant culture > Harvesting, curing, storage
Plant culture > Food crops
Plant culture > Horticulture. Horticultural crops
Plant culture > Fruit and fruit culture
Plant pests and diseases
Live Archive:19 Dec 2022 04:35
Last Modified:19 Dec 2022 04:35

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