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Reddening disorder of 'Honey Gold' mango fruit, preharvest bagging and postharvest lighting

Poudel, A., Joyce, D. C., Macnish, A., Bryant, P. and Hofman, P. (2018) Reddening disorder of 'Honey Gold' mango fruit, preharvest bagging and postharvest lighting. Acta Horticulturae, 1205 . pp. 273-280. ISSN 2406-6168

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Article Link(s): https://doi.org/10.17660/ActaHortic.2018.1205.31

Abstract

The mango cultivar 'Honey Gold' (HG) was developed in Queensland, Australia. Ripe defect-free HG fruit are characterized by bright yellow skin with red blush on their sun-exposed shoulders. HG mangoes are mostly grown from the Northern Territory down though Queensland into northern New South Wales (nNSW). As with many mango cultivars, HG suffers from a range of skin disorders. However, HG mango fruit grown in nNSW almost uniquely express a blotchy 'skin reddening' disorder that detracts from their visual appeal. The non-uniform reddening, which can encompass 'red lenticels', appears to be a host defense response. Causal agents of the reddening disorder are currently elusive. There may be a range of pre- and postharvest abiotic and/or biotic stresses, and they could be additive. A number of physical and chemical treatments were applied pre- or postharvest with a view to either suppress (i.e., prevent) or enhance (i.e., mask) uneven skin reddening. The physical treatments included preharvest fruit bagging and post-harvest exposure to different wavelengths of light. These physical treatments are considered in this paper. The chemical treatments included known modulators of host defense and ethylene responses. Those treatments are not reported in this short paper. However, among the full suite of treatments tested, one only notably influenced skin reddening. In this case, postharvest exposure to blue light increased reddening. Future research with HG will build on this initially promising finding.

Item Type:Article
Business groups:Horticulture and Forestry Science
Keywords:anthocyanin, blue light, host defence, Mangifera indica, physiological disorders, skin
Subjects:Plant culture > Harvesting, curing, storage
Plant culture > Food crops
Plant culture > Fruit and fruit culture
Deposited On:16 Aug 2018 05:22
Last Modified:16 Aug 2018 05:22

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