Characterization of seed oils of wild, edible Finnish berries

Abstract

 A chemotaxonomic screening of the seed oil fatty acids of 22 common, edible berry species belonging to 13 genera (Vaccinium, Oxycoccus, Arctosta-phylos, Empetrum, Hippophaë, Chamaepericlymenum, Sambucus, Rosa, Fragaria, Rubus, Sorbus, Prunusand Ribes) that grow wild in northern Europe was carried out. The highest oil content in the seeds (≈30% d.w.) was measured in Vaccinium, Oxycoccusand Sambucus, and the lowest in Arctostaphylos, Empetrum, Rosaand Chamaepericlymenumspecies (<10% d.w.). The smaller the seed of a berry species within a genus, the higher was the oil content. The mass of 100 seeds varied from 10 mg (V. myrtillus) to 2950 mg (P. padus). Fatty acids of triacylglycerols were analysed as methyl esters by gas chromatography. Typically the most abundant fatty acids were linoleic, α-linolenic, oleic and palmitic acids. Exceptions were S. aucupariaand P. padus,which contained hardly any α-linolenic acid. Currants (Ribes nigrum, Ri. spicatumand Ri. alpinum) also contained γ-linolenic acid (11–16 mol%) and stearidonic acid (3–6 mol%). The content and composition of the seed oil of various berry species within the same genus, or within the same family, were similar, thus supporting the commonly accepted taxonomic classification.