Comparative Study of the Antioxidant Activity and Phytochemical Composition of Leaves Extract between Three Varieties of Date Palm Tree

Abstract

The date palm (Phoenyx dactylifera) consisted, for the people of southern Algeria, as tree of providence. Dates and their extracts are also used for many centuries as a medicine against allergy, inflammation, constipation and gastro-protective; they also have a high antibacterial and antioxidant activity. However, no studies are conducted to evaluate the extract from the leaves of date palm (Phoenyx dactylifera) in point of view of phytochemical composition, antimicrobial and the antioxidant activity. In this study, we have determined the phenolic compounds, antioxidant and antimicrobial activity of methanolic extracts from three varieties of leaves tree. According to the results the leaves extracts have very important values for polyphenols (215.24 to 156.46 mg GAE / g DW) and high antioxidant activity (324. 45 to 206.21 mg GAE / g DW), Diphenyl-1 picrylhydrazyl radical-scavenging activity (IC 50 = 2.98 to 4.83 μg / ml); also the three extracts reveal a considerable antimicrobial potency and antifungal considerable activity, the diameter of inhibition is 35.2 to 39.5 mm (concentration 50 mg/ml) for Candida albicans ATCC 90026.

Antimicrobial activity and antioxidant potential of the methanolic leaf extracts of three cultivars of date palm trees (Phoenix dactylifera) from Saudi Arabia

“…It is believed that the free radical scavenging activity of some medicinal plants is related to the phenolic compounds which contain phenols, flavonoids and tannins [19,20]. Our antioxidant results are in harmony with previous studies, which reported that the leaves of date palm have high antioxidant activity [21,22]. The antioxidant potency of the date palm leaf extracts could be attributed to the richness of these leaves in phytochemicals particularly phenols, the habitat, the environmental conditions, the biochemical and physiological processes of the plant [23].…”

Towards the Utilization of Date Palm (<i>Phoenix dactylifera</i>) Leaves as a Rich Source of Antioxidants

“…Kriaa et al [21] who studied the antioxidant activities of three varieties of DPL reported that the methanolic extracts showed total phenolics ranged between 69.06±0.41-146.46 ± 2.61mg caffeic acid equivalent (CAE)/g. Another study conducted by Eddine et al [22] reported that polyphenols content in three varieties of DPL was ranged from 156.46 ±4.21 to 215.24 ±9.25 mg GAE/g dry weight. The authors referred to that phenolic compounds content in DPL is influenced by several factors including water irrigation, soil, and environmental conditions.…”