Evaluation de l’activité antioxydante in vitro du navet (Brassica rapa L)

Abstract

Turnip (Brassica rapa L.) is a herbaceous plant belonging to the Brassicaceae family, mainly cultivated for its hypertrophied root consumed as a vegetable. The objective of this study is to valorize this plant through the in vitro evaluation of its antioxidant activity and the estimation of its bioactive compound content. Phytochemical analysis of the extract revealed high levels of total polyphenols (4.74 ± 0.063 mg GAE/mg extract), flavonoids (6.23 ± 0.10 μg QE/mg extract), and a low concentration of tannins (0.02 ± 0.005 mg CE/mg extract). Regarding antioxidant activity, the results obtained from three tests showed a reducing power with an IC₅₀ of 7.91 ± 1.44 mg/ml, a ferrous ion chelating capacity with an IC₅₀ of 0.144 ± 0.03 mg/ml, and an inhibition of β-carotene oxidation reaching 79.10% ± 2.41% after 24 hours of incubation.