The aim of this work was to characterize Tunisian cactus pear (Opuntia ficus indica L.) flower through its lipids, essential oils, phenolics, and antioxidant activity. The total lipid content of cactus pear flower was about 2% with the neutral lipid amount, especially monoacylglycerols, being the highest. The lipids were rich in linoleic, oleic, and palmitic acids. The essential oil yield was 0.01% with the presence of 29 components in a complex mixture of monoterpenes. The main components of the essential oil were benzenacetatealdehyde, D‐3‐carene, hexanol, and α‐pinene. Solvents with different polarities had significant effect on polyphenol contents and antioxidant activity of cactus pear flower. RP‐HPLC analysis allowed characterization of 20 phenolic compounds mainly belonging to phenolic acid and flavonoid classes. Based on its phytochemical composition and antioxidant activity, cactus pear flower could be used in food, industrial, and biomedical applications.
Practical applications
The interest in naturally occurring antioxidants has recently increased for use in food, cosmetic, and pharmaceutical products to replace synthetic antioxidants, which are being restricted because of their carcinogenicity. The cactus pear flower constitutes one of the by‐products in cactus industry and generally discarded by separation from the fruit. This study aimed to valorize cactus pear flower through its lipids, essential oils, phenolics, and antioxidant activity.