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Temperature and storage time increase provitamin A carotenoid concentrations and bioaccessibility in post-harvest carrots

Abstract : The aim was to enhance provitamin A carotenoid (proVA CAR) concentrations and bioaccessibility in carrots by manipulating post-harvest factors. To that end, we assessed the effects of Ultraviolet-C light, pulsed light, storage temperature, and storage duration. We also measured CAR bioaccessibility by using an in vitro model. Pulsed light, but not Ultraviolet-C, treatment increased proVA CAR concentrations in the cortex tissue (p<0.05). Longer storage times and higher temperatures also increased concentrations (p<0.05). The maximal increase induced by pulsed light was obtained after treatment with 20 kJ/m 2 and 3-days of storage at 20°C. However, the positive effect induced by pulsed light decreased considerably over the next seven days. ProVA CAR in carrots with the highest concentrations also proved to be more bioaccessible (p<0.05). Thus, proVA CAR concentrations in stored carrots can be increased significantly through storage times and temperatures. Pulsed light can also significantly increase proVA CAR concentrations, but only temporarily.
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https://hal.inrae.fr/hal-03202780
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Submitted on : Tuesday, April 20, 2021 - 11:23:41 AM
Last modification on : Tuesday, May 11, 2021 - 4:50:04 PM

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Faiza Hammaz, Florence Charles, Rachel Kopec, Charlotte Halimi, Salah Fgaier, et al.. Temperature and storage time increase provitamin A carotenoid concentrations and bioaccessibility in post-harvest carrots. Food Chemistry, Elsevier, 2021, 338, pp.128004. ⟨10.1016/j.foodchem.2020.128004⟩. ⟨hal-03202780⟩

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