title: Three-year comparative study of polyphenol contents and antioxidant capacities in fruits of tomato (Lycopersicon esculentum Mill.) cultivars grown under organic and conventional conditions.
abstract: In the present study, four tomato cultivars were grown under organic and conventional conditions in separate unheated greenhouses in three consecutive years. The objective was to assess the influence of the cultivation system on the content of individual polyphenols, total phenolics, and antioxidant capacity of tomatoes. The fruits were analyzed for total phenolic content by the Folin-Ciocalteau method and antioxidant capacity by the DPPH free radical scavenging assay. Individual phenolic compounds were analyzed using HPLC-DAD-MS/MS. Among 30 identified and quantified polyphenols, significantly higher contents of apigenin acetylhexoside, caffeic acid hexoside I, and phloretin dihexoside were found in all organic samples. The content of polyphenols was more dependent on year and cultivar than on cultivation conditions. Generally, the cultivation system had minor impact on polyphenols content, and only a few compounds were influenced by the mode of cultivation in all tested cultivars during all three years.
authors.affiliation: Department of Food Hygiene, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences , Kreutzwaldi 56/3 Tartu 51014, Estonia.
authors.forename: Dea
authors.initials: D
authors.lastname: Anton
authors.forename: Darja
authors.initials: D
authors.lastname: Matt
authors.forename: Priit
authors.initials: P
authors.lastname: Pedastsaar
authors.forename: Ingrid
authors.initials: I
authors.lastname: Bender
authors.forename: Renata
authors.initials: R
authors.lastname: Kazimierczak
authors.forename: Mati
authors.initials: M
authors.lastname: Roasto
authors.forename: Tanel
authors.initials: T
authors.lastname: Kaart
authors.forename: Anne
authors.initials: A
authors.lastname: Luik
authors.forename: Tõnu
authors.initials: T
authors.lastname: Püssa
mesh_terms: D000383:Agriculture / Q000379:methods*; D000975:Antioxidants / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry / Q000254:growth & development*; D018551:Solanum lycopersicum / Q000737:chemistry* / Q000254:growth & development; D015394:Molecular Structure; D058871:Organic Agriculture; D010936:Plant Extracts / Q000737:chemistry*; D059808:Polyphenols / Q000737:chemistry*
chemical_list: D000975:Antioxidants; D010936:Plant Extracts; D059808:Polyphenols