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  • Title: Bioactive Components and Antioxidant Capacity of Fruits from Nine Sorbus Genotypes.
    Author: Mikulic-Petkovsek M, Krska B, Kiprovski B, Veberic R.
    Journal: J Food Sci; 2017 Mar; 82(3):647-658. PubMed ID: 28182841.
    Abstract:
    In this study, biochemical profile of fruits of 9 Sorbus genotypes was analyzed. The content of total sugars ranged from 69.7 g/kg ('Titan') to 217.5 g/kg (Sorbus torminalis) and total organic acids from 17.7 g/kg ('Businka') to 40.2 g/kg (S. torminalis). The highest content of total anthocyanins had 'Burka' (871 mg/kg FW) and 'Businka' (856 mg/kg FW). Quercetin derivatives represented more than 95% of total flavonols. 'Alaja krupnaja' had 3.5- to 29-fold higher rutin content than other analyzed genotypes. S. torminalis fruits had the greatest diversity of isorhamnetin and kaempferol derivatives. Chlorogenic acid was the major hydroxycinnamic acid and its share was 33% to 73% of total analyzed hydoxycinnamic acid derivatives. The richest in chlorogenic acid were 'Krasavica' and 'Alaja krupnaja' fruits. Cultivar 'Businka' had the highest content of epicatechin (40.7 mg/kg) and neochlorogenic acid (1061 mg/kg). Different procyanidin oligomers were detected among flavanols in Sorbus fruits. The highest content of total flavanols was measured in 'Alaja Krupnaja' fruits. Cultivars 'Krasavica' (84.5 mg/kg) and 'Burka' (85.1 mg/kg) had 1.2- to 6.9-fold higher amount of total carotenoids. 'Businka' was highlighted as the richest in total tannin and phenolic contents (3768 mg GAE/kg) and consequently, it had the highest antioxidant activity (57.6 mM TE/kg FW). Being abundant in polyphenolics, some extracts of Sorbus genotypes, for example, 'Businka,' 'Burka,' and 'Alaja krupnaja' could serve as valuable resource of bioactive compounds to food and pharmaceutical industries.
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