ACTIVITÉS BIOLOGIQUES DES EXTRAITS AQUEUX DE PERGULARIA TOMENTOSA L. (ASCLEPIADACEAE)

Abstract

Cherif R., A. Kemassi, Z. Boual, N. Bouziane, F. Benbrahim, A. Hadjseyd, T. Gharib, A. Ould el Hadj-Khelil, M.L. Sakeur et M.D. Ould el Hadj. 2016. Biological activity of aqueous extracts of Pergularia tomentosa L. (Asclepiadaceae). Lebanese Science Journal, 17(1): 27-37. This study focuses on the allelopathic potential of the aqueous extract, obtained under reflux conditions, of Pergularia tomentosa L. (Asclepiadaceae) harvested from the north-eastern region of Algerian Sahara, through the examination of their effects on seeds germina-tion of barley (Hordeum vulgare L.). The results obtained highlighted the inhibitory effect on seed germination of treated barley. It appeared that the pure aqueous extracts and the 50% diluted solution have an excellent capability to inhibit the germination of barley seeds, which corresponds to a 100% inhibition rate, with reduced inhibition for lower concentrations. It is found that the root extract seems more phytotoxic than the foliar extract of the same plant. In addition, abnormal growth abnormalities were observed in the treated samples.

Keywords

• allelopathy
• extract
• Pergularia tomentosa
• phytotoxicity
• abnormality
• Sahara