title: Comparison of the anthocyanin composition during ripening of Syrah grapes grown using organic or conventional agricultural practices.
abstract: The anthocyanin composition of Syrah grapes harvested at different stages of ripening and produced using organic or conventional agriculture was studied. Samples of grapes were collected from veraison to full maturity in each plot, and the content in nine anthocyanins was determined by high-performance liquid chromatography with diode array detection. The total content in anthocyanins during ripening of the conventionally grown grapes was significantly higher compared to that found in the organic production. The accumulation of anthocyanins reached a maximum 28 days after veraison (in agreement with high temperature) and then decreased until harvest. In all samples, grapes from the conventional agriculture presented higher proportions of delphinidin, petunidin, malvidin, and acylated malvidin glucosides compared to grapes from organic agriculture. In contrast with other comparative studies of organically and conventionally grown plants, the results demonstrated a higher content in anthocyanins in conventionally grown grapes.
authors.affiliation: SARL Enigma, Département d'analyses biochimiques, Hameau de St. Véran, 84190 Beaumes de Venise, France.
authors.forename: Maryline Abert
authors.initials: MA
authors.lastname: Vian
authors.forename: Valérie
authors.initials: V
authors.lastname: Tomao
authors.forename: Philippe Olivier
authors.initials: PO
authors.lastname: Coulomb
authors.forename: Jean Michel
authors.initials: JM
authors.lastname: Lacombe
authors.forename: Olivier
authors.initials: O
authors.lastname: Dangles
mesh_terms: D000383:Agriculture / Q000379:methods*; D000872:Anthocyanins / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D058870:Food, Organic / Q000032:analysis*; D005638:Fruit / Q000737:chemistry* / Q000254:growth & development*; D027843:Vitis / Q000254:growth & development*
chemical_list: D000872:Anthocyanins