Abstract
Lygeum spartum represents a natural barrier in the Algerian high plateaus against the advance of sand and the desertification. The plant is of interest due to its tolerance to environmental stress. There are two levels of ploidy in this species; the diploid cytotype 2n = 16 which is confined in the locality of Ain Benkhllil and the polyploid cytotype 2n = 40 which thrives in semi-arid climates and has a large ecologic plasticity. The The aim of this study was the evaluation of the phenolic compounds and flavonoids in both cytotypes. The antioxidant activity was also measured with results showing differences in the level of phenolic compounds; thus, these compounds could serve as biomarkers to distinguish the two cytotypes. Key words: Lygeum spartum L, total phenols, flavonoids, 2,2-diphenylpicrylhydrazyl (DPPH), lipid peroxidation.
Highlights
Lygeum spartum L. (Poaceae) is a native species in Algerian steppe, widely distributed in semi-arid Mediterranean areas
The study focused on finding the major phenolic compounds and the antioxidant activity of both L. spartum L. cytotypes
Estimation of total phenols showed that extracts from diploid cytotype were richer in phenolic compounds in the methanol and butanol extract, while the ethyl acetate fraction showed that polyploid cytotype contained more polyphenols
Summary
Lygeum spartum L. (Poaceae) is a native species in Algerian steppe, widely distributed in semi-arid Mediterranean areas. Spartum have fibrous walls rich in polysaccharide compounds which give the paper pulp. Studies have shown the existence of two levels of ploidy in this species in Algeria; a diploid with 2n = 16 located in arid regions and a polyploid with 2n = 40 present in the semi-arid zones of the littoral (Benmansour and Kaid-Harche, 2001; Djabeur et al, 2008; Boughanmi-Abdeddaim, 2010). The second cytotype diploid (2n = 16) seems to be located on the high Algeria trays, only in Ain Benkhellil and Kheiter (Benmansour and Kaid-Harche, 2001; Djabeur et al, 2008; Boughanmi-Abdeddaim, 2010).
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