title: Rutin and total quercetin content in amaranth (Amaranthus spp.).
abstract: The aim of the study was to confirm the presence of rutin, one of the most common quercetin glycosides, and other quercetin derivatives in plants of genus Amaranthus, to investigate the influence of the species and variety on rutin distribution in the plant and content changes during growing season. The rutin content was determined by micellar electrokinetic capillary chromatography in individual plant parts at the beginning of the growth, at the flowering stage and at the maturity stage of five Amaranthus species. The total quercetin content was determined by micellar electrokinetic capillary chromatography too. The rutin content in amaranth ranged from 0.08 (in seeds) to 24.5 g/kg dry matter (in leaves). Comparison of the determined total quercetin content and the calculated content of quercetin released from rutin did not prove important presence of quercetin or other quercetin derivatives than rutin. Only amaranth leaves sampled at the maturity stage probably contained quercetin or quercetin derivatives. Significant differences in the rutin content were established among species and as well varieties. Amaranthus hybrid and A. cruentus were the best sources of rutin.
authors.affiliation: University of South Bohemia, Studentska 13, 370 05, Ceske Budejovice, Czech Republic. janak@zf.jcu.cz
authors.forename: Jana
authors.initials: J
authors.lastname: Kalinova
authors.forename: Eva
authors.initials: E
authors.lastname: Dadakova
mesh_terms: D027721:Amaranthus / Q000737:chemistry* / Q000145:classification* / Q000502:physiology; D019075:Electrophoresis, Capillary / Q000379:methods; D010802:Phylogeny; D018515:Plant Leaves / Q000737:chemistry; D011794:Quercetin / Q000032:analysis*; D012431:Rutin / Q000032:analysis*; D013045:Species Specificity
chemical_list: D012431:Rutin; D011794:Quercetin