title: Antioxidant activity, polyphenol content, and related compounds in different fruit juices and homogenates prepared from 29 different pomegranate accessions.
abstract: Pomegranate juice is well known for its health beneficial compounds, which can be attributed to its high level of antioxidant activity and total polyphenol content. Our objective was to study the relationships between antioxidant activity, total polyphenol content, total anthocyanins content, and the levels of four major hydrolyzable tannins in four different juices/homogenates prepared from different sections of the fruit. To this end, 29 different accessions were tested. The results showed that the antioxidant activity in aril juice correlated significantly to the total polyphenol and anthocyanin contents. However, the homogenates prepared from the whole fruit exhibited an approximately 20-fold higher antioxidant activity than the level found in the aril juice. Unlike the arils, the antioxidant level in the homogenates correlated significantly to the content of the four hydrolyzable tannins in which punicalagin is predominant, while no correlation was found to the level of anthocyanins.
authors.affiliation: Migal Galilee Technology Center, P.O. Box 831, Kiryat Shmona, 11016, Israel.
authors.forename: Revital
authors.initials: R
authors.lastname: Tzulker
authors.forename: Ira
authors.initials: I
authors.lastname: Glazer
authors.forename: Igal
authors.initials: I
authors.lastname: Bar-Ilan
authors.forename: Doron
authors.initials: D
authors.lastname: Holland
authors.forename: Michael
authors.initials: M
authors.lastname: Aviram
authors.forename: Rachel
authors.initials: R
authors.lastname: Amir
mesh_terms: D000872:Anthocyanins / Q000032:analysis; D000975:Antioxidants / Q000032:analysis*; D001628:Beverages / Q000032:analysis*; D005419:Flavonoids / Q000032:analysis*; D005638:Fruit / Q000737:chemistry*; D047348:Hydrolyzable Tannins / Q000032:analysis; D029561:Lythraceae / Q000737:chemistry*; D010636:Phenols / Q000032:analysis*; D059808:Polyphenols
chemical_list: D000872:Anthocyanins; D000975:Antioxidants; D005419:Flavonoids; D047348:Hydrolyzable Tannins; D010636:Phenols; D059808:Polyphenols