CHARACTERIZATION OF BIOACTIVE SUBSTANCES IN VARIOUS ARTICHOKE VARIETIES
The objective of this work is to determine whether there are differences between artichoke varieties in the content in bioactive substances. The different varieties of artichoke were selected from the collection owned by the ITGA of Navarre. The artichokes were cultivated in the experimental farm of the ITGA in Cadreita according to the Integrated Production standards for this culture in Navarre. The varieties used in this study were: Lorca, Madrigal, Opal, A-106, VP-45, Selección ITGA, Salanquet, Clon 303, INIA D, Macau and Campagnano. Samples of these varieties were collected and taken to the CNTA-Laboratorio del Ebro, in May 2008, where they were analyzed to determine the major biochemical compounds. For each variety, various parameters have been determined: vitamins (C, E and B9), carotenoids (lutein, zeaxanthin, lycopene, α-carotene and β-carotene), polyphenols (quercetin, rutin, resveratrol, myricetin, catechin, epicatechin, caffeic acid and gallic acid) and simple sugars (glucose, fructose, sucrose and lactose) quantified by high performance liquid chromatography. Moreover, general parameters have also been determined: total antioxidant capacity (TAC) by the diphenyl-picryl hydrazyl (DPPH) test, and free and total polyphenols by Folin-Ciocalteu assay. Finally, the dietary fibre content of samples was determined by enzymatic digestion. The results show that the compounds allowing the distinction between artichoke varieties analyzed are vitamin E, lutein, glucose, TAC, free and total polyphenols. Madrigal reached the highest content in fat-soluble compounds (vitamin E and lutein) and VP-45 is the most interesting variety in terms of concentration in antioxidants.
Romo-Hualde, A., Sáiz-Abajo, M.J., Yetano-Cunchillos, A.I., González-Ferrero, C., Alonso-Santibañez , D., Salvadó-Casadevall, M., Lahoz , I. and Macua , J.I. (2012). CHARACTERIZATION OF BIOACTIVE SUBSTANCES IN VARIOUS ARTICHOKE VARIETIES. Acta Hortic. 942, 395-400
Cynara cardunculus L. var. scolymus, bioactive compounds, antioxidants, vitamins