دراسة الخصائص الفيتوكيميائية لأوراق و بذور بعض أصناف الكينوا

Abstract

This work includes a phytochemical study of the leaves and seeds of four cultivars of Chenopodium quinoa Willd (black, white, red, V2), where each of; Chemical detection of active substances, quantitative determination of secondary metabolites with to chromatographic analysis (HPLC), as well as study of antioxidant activity. The results of the chemical detection showed the contain of the quinoa plant in active substances: Flavonoids, Alkaloids, Tannins, Saponins.. The quantitative estimation also showed that the content of polyphenols was equivalent between the leaves and seeds of all studied cultivars, while for flavonoids, the highest content was in the white quinoa seeds. The content of tannins was weak in all extracts, except for red quinoa seed extract. The qualitative HPLC analysis showed that there are quantitative and qualitative differences in the phenolic compounds among the studied plant extracts. However, all of them contained: Gallic acid, Chlorogenic, Caffeic and Quercetin flavonoids, and the leaf extracts were distinguished by the presence of Vanillic acid. Regarding the antioxidant activity, white quinoa seed extract had the best effect on inhibiting DPPH • (IC50=107±2.55µg/ml)