Abstract

AGUAYO-ROJAS, Jesús et al. Phenolic compounds, antioxidant capacity and antihypertensive activity of quince (Cydonia oblonga Miller) harvested in Zacatecas. Polibotánica [online]. 2024, n.57, pp.199-212.  Epub Apr 19, 2024. ISSN 1405-2768.  https://doi.org/10.18387/polibotanica.57.12.

Fruits contain high levels of biologically active compounds that impart health benefits, Zacatecas occupies the first places in quince production nationwide. The objective of the present study was to evaluate the content and profile of phenolic compounds, as well as to the antioxidant and antihypertensive of quince harvested in Zacatecas. Methanolic extracts were made to evaluate the antioxidant capacity and it was determined by the DPPH and ABTS methods. The antihypertensive activity was evaluated by means of the inhibition of the angiotensin converting enzyme I, presenting an inhibition of 45%, and the phenolic compounds profile was determined by HPLC-DAD. The flavonoid and tannin content were 422 and 250 mg of catechin equivalents/ 100 g (db), respectively; for total phenolics it was 122 mg of gallic acid equivalents/ 100 g (db) and for coumarins 46 mg of coumarin equivalents/100 g (db). Regarding antioxidant capacity, levels of 6,853 and 11,050 μmol Trolox equivalents/100 g (db) were obtained for DPPH and ABTS, respectively. Four flavonoids catechin, quercetin, rutin and myricetin and two phenolic acids ferulic and sinapic were identified, these phenolic compounds may be responsible for the health benefits of quince.

Keywords : Phytochemicals; antioxidant capacity; antihypertensive activity; flavonoids.

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