Effect of drying and storage on the content of provitamin A of orange fleshed sweet potato (Ipomoa batatas): direct sun radiations do not have significant impact

Bechoff, Aurélie, Westby, Andrew, Dufour, Dominique, Dhuique-Mayer, Claudie, Marouzé, C., Owori, Constance, Menya, Geoffrey and Tomlins, Keith (2007) Effect of drying and storage on the content of provitamin A of orange fleshed sweet potato (Ipomoa batatas): direct sun radiations do not have significant impact. In: 10th Triennial Symposium of the International Society for Tropical Root Crops - African Branch (ISTRC-AB), 8-12 Oct 2007, Maputo, Mozambique. (Unpublished)

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Abstract

[Introduction] Sweetpotato is an important crop that is widely consumed in sub-Saharan Africa. Sun drying of sweetpotatoes is a traditional practice: after drying on rocks crushed or sliced dried sweetpotato are stored in granaries; re-hydrated and boiled to be eaten like fresh roots, or milled into flour to make porridge. Orange
fleshed sweetpotato is being promoted in Africa to tackle vitamin A deficiency. There are inconsistent reports on the effect of sun-drying on pro-vitamin A retention. High losses have been reported which may be associated with the unsaturated instable provitamin A carotenoids easily degraded by light, oxygen and heat (Rodriguez Amaya 1997). This poster describes work to understand the effects of sun/solar drying and storage on pro-vitamin A retention.

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