title: Quantitative analysis of antiradical phenolic constituents from fourteen edible Myrtaceae fruits.
abstract: Many species of Myrtaceae are cultivated in home gardens throughout the tropics for their edible fruit, and have been used in traditional medicine to treat several inflammatory conditions. Fruit phenolics are important dietary antioxidant and anti-inflammatory constituents. We have investigated the antiradical activity, total phenolic content (TPC), and total anthocyanin content (TAC) of 14 underutilized Myrtaceae fruits, namely Eugenia aggregata, E. brasiliensis, E. luschnathiana, E. reinwardtiana, Myrciaria cauliflora, M. dubia, M. vexator, Syzygium cumini, S. curranii, S. jambos, S. javanicum, S. malaccense, S. samarangense, and S. samarangense var. Taiwan pink. An HPLC-PDA method was developed to quantify the amounts of cyanidin 3-glucoside (1), delphinidin 3-glucoside (2), ellagic acid (3), kaempferol (4), myricetin (5), quercetin (6), quercitrin (7), and rutin (8) present in MeOH extracts of the fruit. TPC ranged from 3.57 to 101 mg/g, TAC ranged from undetectable to 12.1 mg/g, and antiradical activity, measured as DPPH˙ IC(50), ranged from very active (19.4 μg/ml) to inactive (389 μg/ml).
authors.affiliation: Department of Biological Sciences, Lehman College and the Graduate Center, City University of New York, 250 Bedford Park Boulevard West, Bronx, NY 10468.
authors.forename: Kurt A
authors.initials: KA
authors.lastname: Reynertson
authors.forename: Hui
authors.initials: H
authors.lastname: Yang
authors.forename: Bei
authors.initials: B
authors.lastname: Jiang
authors.forename: Margaret J
authors.initials: MJ
authors.lastname: Basile
authors.forename: Edward J
authors.initials: EJ
authors.lastname: Kennelly