Journal
FOOD RESEARCH INTERNATIONAL
Volume 86, Issue -, Pages 24-33Publisher
ELSEVIER
DOI: 10.1016/j.foodres.2016.05.007
Keywords
Verbenaceae; Phenolic compounds; Phenylpropanoid glycosides; Carotenoids; Antioxidant capacity
Categories
Funding
- FCT (Fundacao para a Ciencia e a Tecnologia, Portugal) [UID/Multi/04378/2013, PTDC/QEQ-QAN/1742/2014]
- CAPES (Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior, Brazil) [99999.010352/2014-07]
- Fundação para a Ciência e a Tecnologia [PTDC/QEQ-QAN/1742/2014] Funding Source: FCT
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Citharexylum solanaceum is a native fruit from Brazil, which both bioactive compounds and antioxidant potential were not yet investigated. Thus, the freeze-dried extracts of seed and pulp + skin of C. solanaceum fruits were obtained after solid-liquid extraction with ethanol and their bioactive compounds composition, namely phenolic compounds and carotenoids, were determined. The antioxidant capacity of both extracts against physiologically relevant reactive oxygen species (ROS) and reactive nitrogen species (RNS) was further investigated. Both C. solanaceum extracts showed high contents of phenolic compounds; however, pulp + skin extract presented 2.4-times more phenolic compounds (33.54 mg/g) than the seed extract (14.09 mg/g). Verbascoside (phenylpropanoid) was the major compound identified in both extracts (11-25 mg/g). Regarding the carotenoid composition, all-trans-lutein (14-42 mu g/g) and all-trans-beta-carotene (13-44 mu g/g) were the major compounds in both extracts. The high content of phenolic compounds and carotenoids in pulp + skin extract might explain its higher scavenging capacity against all the ROS/RNS as compared to seed extract In general, both extracts showed better scavenging capacity for the RNS than for the ROS. Our results indicate that C. solanaceum fruits can be explored as an important natural source of antioxidant compounds. (C) 2016 Elsevier Ltd. All rights reserved.
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