title: The seasonal variation in bioactive compounds content in juice from organic and non-organic tomatoes.
abstract: A specific objective of this paper was to evaluate seasonal changes in bioactive compounds level (carotenoids and polyphenols) in juice prepared from organic and non-organic tomatoes in Poland. In the examined tomato juice, the content of dry matter, vitamin C, carotenoids as well as polyphenols (by HPLC method) has been measured. The presented results indicate the impact of the growing system and the year of production on the composition of tomato juice. The organic tomato juice contained significantly more beta-carotene, chlorogenic acid, rutin as well as more total phenolic acids, gallic acid, p-coumaric acid, total flavonoids, quercetin-3-O-glucoside and quercetin in comparison with the non-organic. The tomato juice from 2008 contained significantly more carotenoids and some flavonoids compared to the one produced in 2009, which contained significantly more dry matter, vitamin C, as well as quercetin and it derivatives.
authors.affiliation: WULS-SGGW, Faculty of Human Nutrition and Consumer Sciences, Department of Functional, Organic Food and Commodities, Warsaw, Poland. ewelina_hallmann@sggw.pl
authors.forename: Ewelina
authors.initials: E
authors.lastname: Hallmann
authors.forename: Janusz
authors.initials: J
authors.lastname: Lipowski
authors.forename: Krystian
authors.initials: K
authors.lastname: Marszałek
authors.forename: Ewa
authors.initials: E
authors.lastname: Rembiałkowska
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis*; D001628:Beverages / Q000032:analysis*; D002338:Carotenoids / Q000032:analysis*; D002726:Chlorogenic Acid / Q000032:analysis; D002851:Chromatography, High Pressure Liquid; D003373:Coumaric Acids / Q000032:analysis; D005419:Flavonoids / Q000032:analysis; D005960:Glucosides; D018551:Solanum lycopersicum / Q000737:chemistry*; D058871:Organic Agriculture; D011044:Poland; D059808:Polyphenols / Q000032:analysis; D011422:Propionates; D011794:Quercetin / Q000031:analogs & derivatives; D012431:Rutin / Q000032:analysis; D012621:Seasons
chemical_list: D003373:Coumaric Acids; D005419:Flavonoids; D005960:Glucosides; D059808:Polyphenols; D011422:Propionates; C532085:quercetin 3'-O-glucoside; D002726:Chlorogenic Acid; D002338:Carotenoids; D012431:Rutin; D011794:Quercetin; C495469:p-coumaric acid; D001205:Ascorbic Acid