Abstract
Antioxidant characteristics of leaves, twigs, and acorns from two Serbian oak species Quercus robur L. and Quercus petraea L. from Vojvodina province (northern Serbia) were investigated. 80% ethanol (in water) extracts were used for antiradical power (ARP) determinations against DPPH•, •NO, and O2 •− radicals, ferric reducing antioxidant power (FRAP), total phenol, tannin, flavonoid, and proanthocyanidin contents. Permanganate reducing antioxidant capacity (PRAC) was determined using water extracts. Beside, mentioned parameters, soluble proteins, lipid peroxidation (LP), pigments and proline contents were also determined. The data of different procedures were compared and analyzed by multivariate techniques (correlation matrix calculation and principal component analysis (PCA)). PCA found that investigated organs of two different oak tree species possess similar antioxidant characteristics. The superior antioxidant characteristics showed oak leaves over twigs and acorns and seem to be promising source of antioxidants with possible use in industry and pharmacy.
Highlights
Quercus trees, commonly known as oaks, belong to the family Fagaceae
Antioxidant characteristics of leaves, twigs, and acorns from two Serbian oak species Quercus robur L. and Quercus petraea L. from Vojvodina province were investigated. 80% ethanol extracts were used for antiradical power (ARP) determinations against DPPH∙, ∙NO, and O2∙− radicals, ferric reducing antioxidant power (FRAP), total phenol, tannin, flavonoid, and proanthocyanidin contents
This paper presents antioxidant characteristics of two Serbian oak species Quercus robur L. and Quercus petraea L. from Vojvodina province, in northern Serbia
Summary
Commonly known as oaks, belong to the family Fagaceae. They comprise 450 species worldwide [1]. Oak wood is valued for its mechanical properties and durability. It has been widely used since prehistoric times [2]. In the forestry fund of Serbia, there is the significant participation of sessile oak (7.28%) [4]. The wood is durable and tough and attractively grained. It is especially valued in shipbuilding and construction and for flooring, furniture, barrels, and veneer. In Serbia, oak is a sacred tree, used in Serbian Christmas traditions
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