Flavonoid content and composition in leaves and berries of sea buckthorn (Hippophae spp.) of different origin

[..] High flavonoid content could be used as a desirable character in selection of sea buckthorn suitable for Canadian prairie. The objective of this study was to determine total flavonoid content and flavonoid profile in leaves and berries of Hippophae species originating from China, Russia, Finland and Canada, collected from the sea buckthorn germplasm nursery at the PFRA Shelterbelt Centre in Indian Head, Saskatchewan. Three species (H. rhamnoides, H. gyantensis, H. neuro-carpa) and four subspecies of H. rhamnoides: rhamnoides, sinensis, turkestanica and mongolica ('Indian Summer') were investigated. Results from a three-year study of leaf and berry samples indicated that flavonoid content, expressed as isorhamnetin equivalents, ranged from 0.83% to 2.00% in air-dried leaves, and 0.18% to 0.56% in lyophilized berry flesh. 'Indian Summer' selection R-C4 Rafferty contained the highest amount of flavonoids in both leaves (1.7% to 2.0%) and berries (0.41% to 0.49%).[...]