Evaluation of antioxidant activities of the edible and medicinal Acacia albida organs related to phenolic compounds

Abstract

This study compared phenolic contents and antioxidant activity in different organs of Acacia albida (leaves and bark) and focuses on identification of phenolic compounds of leaves by HPLC-DAD. The analysed organs exhibited differences in total polyphenol contents (100 and 59.5 mg GAE g^− 1 DW). Phenolic contents of leaves were two times higher than those in bark. Ethanolic extracts exhibited good antioxidant activities with IC₅₀ = 26 μg mL^− 1 for DPPH and EC₅₀ = 50 μg mL^− 1 for FRAP. Identification by HPLC-DAD revealed the presence of nine phenolic compounds known for their high antioxidant activity. The results suggested that this species can be used as source of natural antioxidants.

Keywords::

• Acacia albida
• phenolic compounds
• HPLC-DAD
• leaves
• bark

Funding

This work was supported by the Algerian Ministry of Higher Education and Scientific Research, Centre de Recherche Scientifique et Technique sur les Régions Arides (CRSTRA, Algeria) and Centre de Biotechnologie de Borj Cédria (CBBC, Tunisia).