title: Changes of Polyphenolic Substances in the Anatomical Parts of Buckwheat (Fagopyrum esculentumMoench.) during Its Growth Phases.
abstract: In this study the changes of total polyphenolics in different anatomical parts (stems, leaves, flowers and seeds) of common buckwheat (Fagopyrum esculentumMoench.) during vegetation period were analysed. The content of total polyphenolics was evaluated in growth phase I (formation of buds), phase II (at the beginning of flowering), phase III (full blossoming) and phase IV (full ripeness). In all growth phases (GP) the stems and leaves were evaluated and statistically significant differences in polyphenolics content between the two parts were confirmed. Statistically significant differences (p< 0.01) in polyphenolics content (in GP II and III) between stems and leaves; and between stems and flowers were found. In flowers an average of 13.8 times higher and in leaves 6 times higher concentration of polyphenolics in comparison with stems was measured. In GP III the content of polyphenolics in common buckwheat was following: flowers > leaves > achene > stems. In flowers an average of 11.9 times higher, in leaves 8.3 times higher and in achenes 5.9 times higher contents of polyphenolics compared with stems were found. In GP III and IV (leaves, achenes, stems) the leaves contained in average 20 times higher and achenes 5.6 times higher polyphenolics than stems.
authors.affiliation: Department of Chemistry, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A Hlinku 2, 949 76 Nitra, Slovak Republic. janette.musilova@uniag.sk.
authors.forename: Judita
authors.initials: J
authors.lastname: Bystricka
authors.affiliation: Department of Chemistry, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A Hlinku 2, 949 76 Nitra, Slovak Republic. janette.musilova@uniag.sk.
authors.forename: Janette
authors.initials: J
authors.lastname: Musilova
authors.affiliation: Department of Chemistry, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A Hlinku 2, 949 76 Nitra, Slovak Republic. jan.tomas@uniag.sk.
authors.forename: Jan
authors.initials: J
authors.lastname: Tomas
authors.affiliation: Department of Chemistry, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A Hlinku 2, 949 76 Nitra, Slovak Republic. alena.vollmannova@uniag.sk.
authors.forename: Alena
authors.initials: A
authors.lastname: Vollmannova
authors.affiliation: Department of Chemistry, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, 165 21 Prague 6-Suchdol, Czech Republic. lachman@af.czu.cz.
authors.forename: Jaromir
authors.initials: J
authors.lastname: Lachman
authors.affiliation: Department of Chemistry, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A Hlinku 2, 949 76 Nitra, Slovak Republic. petra.kavalcova@gmail.com.
authors.forename: Petra
authors.initials: P
authors.lastname: Kavalcova
keywords: anatomical parts; buckwheat; polyphenolics