Seasonal, gender and regional variations in total phenolic, flavonoid, and condensed tannins contents and in antioxidant properties fromPistacia atlanticassp. leaves

Abstract

Context: The widespread use of Pistacia atlantica Desf. ssp. (Anacardiaceae) in traditional medicine can be partly attributed to the content of its secondary metabolites, in particular, the phenolic compounds.Objective: The effects of harvest period, growing region and gender on the phenolic compounds, flavonoids and condensed tannins contents were studied, as well as on the antioxidant activities of P. atlantica leaves in order to provide a scientific basis for optimal collection.Materials and methods: Leaves were collected monthly from April to October 2010 in two Algerian sites. The powdered leaves were used for preparing the ethyl acetate extract. Contents of total phenolics (TPC), flavonoids (FC) and condensed tannins (CTC) were determined spectrophotometrically. Antioxidant activity was evaluated through radical scavenging activity (RSA) of 2,2-diphenyl-1-picrylhydrazyl (250 μM) and the reducing power capacity (RPC) determination by K3Fe(CN)6 (1%).Results: The TPC was found to vary from 79 ± 13 to 259 ± 8 mg gallic acid equivalents/g of dry weight (DW) during the study period. The RSA and RPC varied between 262 ± 18 and 675 ± 21 mg Ascorbic Acid Equivalent (AAE)/g DW, and from 259 ± 16 to 983 ± 20 mg AAE/g DW, respectively. A seasonal pattern was observed consisting of a decrease in TPC content and RPC from spring to autumn. The FC, CTC and RSA did not show a seasonal pattern.Discussion and conclusion: Our findings showed that secondary metabolite content and antioxidant activities of P. atlantica leaves were more influenced by harvest time and growing region than by gender.

Variation in the Phenolic Compounds Profile and Antioxidant Activity in Different Parts of Hawthorn (Crataegus pentagyna Willd.) During Harvest Periods

“…[Routray & Orsat, 2014;Tiwari & Cummins, 2013]. Owing to all the above mentioned, many types of researches have addressed changes in the content of bioactive components of plants [Ben Ahmed et al, 2017;Cezarotto et al, 2017;Hlel et al, 2017;Rimkiene et al, 2017].…”

<p>Antihyperlipidemic and Antioxidative Properties of <em>Pistacia atlantica</em> subsp. <em>kurdica</em> in Streptozotocin-Induced Diabetic Mice</p>

“…Phytochemical studies on different subspecies of P. atlantica extract indicated the presence of flavonoids and phenolic compounds as major chemical components. 11,[21][22][23] These compounds may be associated with the therapeutic effects of P. atlantica. Previously, Hashemnia et al have reported that N-hexane extract of P. atlantica seed produced a potent antihyperglycemic effect in STZ diabetic mice.…”

Phytochemical variation among populations of Fouquieria splendens Engelm. (Fouquieriaceae)

“…Warmer temperatures were registered in S 1 , whereas the lowest in S 1 and S 3 . Previous reports have informed that temperature (Liu et al 2016, Ben Ahmed et al 2017 and soil features (Borges et al 2013) are important factors regulating the synthesis of phenolic compounds.…”