Comparative Study of Antioxidant Power, Polyphenols, Flavonoids and Betacyanins of the Peel and Pulp of Three Tunisian Opuntia Forms

Antioxidants
Nizar YeddesMalika T Ayadi

Abstract

The antioxidant activity and the chemical composition of methanol extracts from peel and pulp belonging to two species of Tunisian prickly pears Opuntia ficus indica (spiny and thornless forms) and Opuntia stricta have been studied. The antioxidant capacity was measured by DPPH radical scavenging activity. The total phenolic compound (TPC) and the total flavonoid content were determined by the Folin-Ciocalteu method and colorimetric method, respectively. The phenolic compounds were identified and quantified by high-performance liquid chromatography (HPLC) coupled with an electrospray ionization mass spectrometry (ESI-MS). The results showed that O. stricta fruits present the best antioxidant activities than the two forms of O. ficus indica, while the TPC was more important in O. ficus indica than in the O. stricta fruits. The peels have higher flavonoids than pulp, and the thornless variety has more flavonoid than the spiny. The RP-HPLC and ESI-MS analysis detected two classes of phenolic compounds and betalain pigments. Isorhamnetin derivatives are the dominant flavonol glycoside identified in O. ficus indica (spiny: 65.25 μg·g(-1); thornless: 77.03 μg·g(-1)) and O. stricta peels (19.22 μg·g(-1)).

References

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Citations

Jul 20, 2017·Journal of Evidence-based Complementary & Alternative Medicine·Helen Mier-GiraldoGabriela Cáez-Ramírez
Oct 31, 2017·Asian Pacific Journal of Tropical Medicine·Meryem BakourBadiaa Lyoussi
Nov 17, 2019·International Journal of Molecular Sciences·Erika Ortega-HernándezDaniel A Jacobo-Velázquez
Feb 23, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Anna OniszczukEwa Markut-Miotła
May 12, 2017·Oxidative Medicine and Cellular Longevity·María Del Socorro Santos DíazAnne Nègre-Salvayre
May 5, 2020·Pakistan Journal of Biological Sciences : PJBS·Eman M HegazyNevein S M Saleh
Oct 11, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Bruno MelgarEsperanza M Garcia-Castello
Dec 10, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Joanna Kolniak-OstekFrancisca Hernandez
Apr 17, 2019·Journal of Pharmacopuncture·Reza ShiraziniaVahid Reza Askari

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Methods Mentioned

BETA
electron paramagnetic resonance

Software Mentioned

SPSS
Xcalibur

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