title: Enhancement of antioxidant and isoflavones concentration in gamma irradiated soybean.
abstract: Serbian soybean genotype Ana was gamma irradiated at doses of 1, 2, 4, and 10 kGy in order to evaluate the influence of gamma irradiation on isoflavone (genistein, daidzein, and their glycosides genistin and daidzin) contents and hydroxyl radical scavenging effect (HRSE). The increase in genistin and daidzin contents as well as antioxidant activities was observed especially at doses of 4 and 10 kGy. Results were also compared with our previous results relating to total phenol content (TPC), DPPH radical scavenger capacity (DPPH RSC), and ferric reducing antioxidant power (FRAP). Our results indicated that doses up to 10 kGy improve the antioxidant activities of soybean and also nutritional quality with respect to isoflavone content. All results were analyzed by multivariate techniques (correlation matrix calculation and autoscaling transformation of data). Significant positive correlations were observed between genistin, daidzin, DPPH RSC, and HRSE.
authors.affiliation: Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21000 Novi Sad, Serbia.
authors.forename: Boris M
authors.initials: BM
authors.lastname: Popović
authors.forename: Dubravka
authors.initials: D
authors.lastname: Stajner
authors.forename: Anamarija
authors.initials: A
authors.lastname: Mandić
authors.forename: Jasna
authors.initials: J
authors.lastname: Canadanović-Brunet
authors.forename: Slavko
authors.initials: S
authors.lastname: Kevrešan
mesh_terms: D000975:Antioxidants / Q000378:metabolism*; D004307:Dose-Response Relationship, Radiation; D005720:Gamma Rays; D007529:Isoflavones / Q000378:metabolism*; D010936:Plant Extracts / Q000378:metabolism* / Q000528:radiation effects*; D011829:Radiation Dosage; D013025:Glycine max / Q000378:metabolism* / Q000528:radiation effects*
chemical_list: D000975:Antioxidants; D007529:Isoflavones; D010936:Plant Extracts