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Effect of drying and storage on the degradation of total carotenoids in orange-fleshed sweetpotato cultivars

Effect of drying and storage on the degradation of total carotenoids in orange-fleshed sweetpotato cultivars

Bechoff, Aurélie, Westby, Andrew, Owori, Constance, Menya, Geoffrey, Dhuique-Mayer, Claudie, Dufour, Dominique and Tomlins, Keith (2009) Effect of drying and storage on the degradation of total carotenoids in orange-fleshed sweetpotato cultivars. Journal of the Science of Food and Agriculture, 90 (4). pp. 622-629. ISSN 0022-5142 (Print), 1097-0010 (Online) (doi:10.1002/jsfa.3859)

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Abstract

BACKGROUND: Orange-fleshed sweetpotato (OFSP) can be used to tackle vitamin A deficiency, a major public health problem in most developing countries. In East Africa, common ways of using sweetpotato include drying and subsequent storage. The aim of the study was to investigate the impact of drying and storage on the total carotenoid retention (as an estimate of provitamin A retention) from OFSP.
RESULTS: Losses of total carotenoid during drying were generally low (15% or less). Total carotenoid retention in OFSP was not dependent on the type of dryer (solar or sun). Sweetpotato cultivar (Ejumula, Kakamega, SPK004/1, SPK004/1/1, SPK004/6 or SPK004/6/6) had a significant effect on retention in drying (P < 0.05). High percentage losses of total carotenoids were, however, correlated with high moisture content and high carotenoid content in fresh sweetpotato roots. After 4 months’ storage at room temperature in Uganda, losses of total carotenoid in dried sweetpotato chips were high (about 70%) and this was not dependent on the use of opaque or transparent packaging.
CONCLUSION: Losses of carotenoids during storage were considered to be more of a nutritional constraint to the utilisation of dried sweetpotato than losses occurring during drying. The relationship between characteristics of the cultivars and losses of carotenoids during drying should be taken into account in selection of cultivars for processing.

Item Type: Article
Additional Information: [1] Article first published online: 23 DEC 2009. [2] Published in print: 15 March 2010. [3] Published as: Journal of the Science of Food and Agriculture, (2010), Volume 90, (4), pp. 622–629. [4] The Journal of the Science of Food and Agriculture is published by John Wiley & Sons Inc. on behalf of the Society of Chemical Industry (SCI).
Uncontrolled Keywords: Ipomoea batatas (L.) Lam, carotenoid, storage, drying, cultivar
Subjects: S Agriculture > S Agriculture (General)
S Agriculture > SB Plant culture
Faculty / Department / Research Group: Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Food & Markets Department
Related URLs:
Last Modified: 11 Nov 2013 13:01
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/3870

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