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Influence of Heat Treatments on Carotenoid Content of Cherry Tomatoes
CRA-NUT, Agricultural Research Council-Center for Food and Nutrition, Via Ardeatina 546, Rome 00178, Italy
* Author to whom correspondence should be addressed.
Received: 29 May 2013; in revised form: 18 June 2013 / Accepted: 18 July 2013 / Published: 31 July 2013
Abstract: Tomatoes and tomato products are rich sources of carotenoids—principally lycopene, followed by β-carotene and lutein. The aim of this work was to study the effect of heat treatment on carotenoid content in cherry tomatoes. Raw and canned products were sampled and analysed; furthermore whole, skin and pulp fractions of cherry tomatoes were analysed when raw and home-processed, in order to better understand heat treatment effects. Lycopene content in canned tomatoes was two-fold higher than in raw tomatoes (11.60 mg/100 g versus 5.12 mg/100 g). Lutein and β-carotene were respectively 0.15 mg/100 g and 0.75 mg/100 g in canned tomatoes versus 0.11 mg/100 g and 1.00 mg/100 g in raw tomatoes. For home-processed tomatoes, β-carotene and lutein showed a content decrease in all thermally treated products. This decrease was more evident for β-carotene in the skin fraction (−17%), while for lutein it was greater in the pulp fraction (−25%). Lycopene presented a different pattern: after heat treatment its concentration increased both in the whole and in pulp fractions, while in the skin fraction it decreased dramatically (−36%). The analysis of the isomers formed during the thermal treatment suggests that lycopene is rather stable inside the tomato matrix.
Keywords: lycopene; home-processed; thermal treatments; geometric isomers
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MDPI and ACS Style
D'Evoli, L.; Lombardi-Boccia, G.; Lucarini, M. Influence of Heat Treatments on Carotenoid Content of Cherry Tomatoes. Foods 2013, 2, 352-363.
D'Evoli L, Lombardi-Boccia G, Lucarini M. Influence of Heat Treatments on Carotenoid Content of Cherry Tomatoes. Foods. 2013; 2(3):352-363.
D'Evoli, Laura; Lombardi-Boccia, Ginevra; Lucarini, Massimo. 2013. "Influence of Heat Treatments on Carotenoid Content of Cherry Tomatoes." Foods 2, no. 3: 352-363.