title: Polyphenolic content in different plant parts of soy cultivars grown under natural conditions.
abstract: Roots, cotyledons, leaves, stems, pods, and seeds of three soy cultivars were analyzed for their content of isoflavones, flavonols, coumarins, and phenolic acid derivatives with three samplings during a three-month period. The extracts were analyzed by HPLC/DAD and HPLC/MS, allowing us to confirm the presence of daidzein and genistein derivatives as the major isoflavones and to characterize coumarins, most flavonols and phenolic acid derivatives. Seeds exhibited the highest content of isoflavones: 12.61 g/kg of dry weight (DW) in cv. Emiliana; 8.97 g/kg of DW in cv. Elvir; 4.49 g/kg of DW in cv. Kure, and roots are the only part with coumarins, ranging from 4.08 g/kg of DW (cv. Emiliana) to 1.29 g/kg of DW (cv. Elvir) for the longest sampling period. Leaves, pods, and stems have flavonols, and in particular leaves showed: 7.28 g/kg of DW in cv. Emiliana; 6.57 g/kg of DW in cv. Elvir; 7.08 g/kg of DW in cv. Kure. The high content of isoflavones found in the seeds could be ascribed to the natural conditions under which the soy plants were grown.
authors.affiliation: Dipartimento di Scienze Farmaceutiche, Università degli Studi di Firenze via G. Capponi, 9 50121 Firenze, Italy. annalisa.romani@unifi.it
authors.forename: Annalisa
authors.initials: A
authors.lastname: Romani
authors.forename: Pamela
authors.initials: P
authors.lastname: Vignolini
authors.forename: Carlotta
authors.initials: C
authors.lastname: Galardi
authors.forename: Claudio
authors.initials: C
authors.lastname: Aroldi
authors.forename: Concetta
authors.initials: C
authors.lastname: Vazzana
authors.forename: Daniela
authors.initials: D
authors.lastname: Heimler
mesh_terms: D002851:Chromatography, High Pressure Liquid; D018548:Cotyledon / Q000737:chemistry; D003374:Coumarins / Q000032:analysis; D005419:Flavonoids / Q000032:analysis; D044948:Flavonols; D062385:Hydroxybenzoates / Q000032:analysis; D007529:Isoflavones / Q000032:analysis; D013058:Mass Spectrometry; D010636:Phenols / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D011108:Polymers / Q000032:analysis*; D012639:Seeds / Q000737:chemistry; D013025:Glycine max / Q000737:chemistry* / Q000254:growth & development*
chemical_list: D003374:Coumarins; D005419:Flavonoids; D044948:Flavonols; D062385:Hydroxybenzoates; D007529:Isoflavones; D010636:Phenols; D011108:Polymers; C017616:phenolic acid