Antioxidant activity and phenolic profile of commercial and wild roots of Fragaria vesca L.
Artigo de Conferência
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resumo
Fragaria vesca L (Rosaceae), wild strawberry, is commonly found in forests, slopes
and roadsides. Widely spread across Europe, it can be also found in Korea, Japan,
North America and Canada [1 ]. The roots are traditionally used as decoction and infusion
to treat cough symptoms, urinary tract infections, haemorrhoids, diarrhoea, and
gout, but also for their tonic, stimulant and diuretic properties. Those bioactive properties
have been mainly related with the composition in various phenolic compounds such
as anthocyanins, proanthocyanidins, flavonols, and derivatives of hydroxycinnamic and
ellagic acids [2, 3]. As far as we know, there are no reports on the phenolic profile and
antioxidant activity of F. vesca roots. In the present study, commercial and wild roots
of this species were submitted to different extraction procedures, aqueous (by infusion
or decoction) and hydromethanolic, in order to compare their antioxidant potential and
to establish the individual phenolic profile of each one. Commercial and wild samples
showed similarities in terms of flavan 3-ols (TF30), with catechin derivatives, mainly
procyanidins, as major compounds in both samples. The commercial sample presented
ellagic acid glycosides, whereas the wild sample presented flavonols (TF) and dihydroflavonols (taxifolin derivatives). The infusion of wild sample gave the highest content of
total phenolic compounds (TPC, 253.42 mg/g, dw) and the highest DPPH scavenging
activity, reducing power and lipid peroxidation inhibition (TSARS assay) (EC50 = 50.56,
44.78 and 4.76 1-Jg/ml, respectively). The antioxidant capacity (mainly ~-carotene
bleaching and TSARS assays) observed for the wild sample is correlated with TF30 ,
TF and TPC. Overall, the antioxidant activity of F. vesca roots could be directly obtained
by consumption of infusions/decoctions or by incorporating hydromethanolic extracts in
antioxidant formulations for cosmetic, pharmaceutical or food industries.
