Antioxidant potency of white (Brassica oleracea L. var. capitata) and Chinese (Brassica rapa L. var. pekinensis (Lour.)) cabbage: The influence of development stage, cultivar choice and seed selection

0368605 - ÚEB 2012 RIV NL eng J - Journal Article
Šamec, D. - Piljac-Žegarac, J. - Bogovic, M. - Habjanic, K. - Grúz, Jiří
Antioxidant potency of white (Brassica oleracea L. var. capitata) and Chinese (Brassica rapa L. var. pekinensis (Lour.)) cabbage: The influence of development stage, cultivar choice and seed selection.
Scientia horticulturae. Roč. 128, č. 2 (2011), s. 78-83. ISSN 0304-4238. E-ISSN 1879-1018
R&D Projects: GA AV ČR KAN200380801; GA ČR GA301/08/1649
Institutional research plan: CEZ:AV0Z50380511
Keywords : Antimicrobial activity * Antioxidant capacity * Brassica oleracea L. var. capitata * rapa L. var. pekinensis Lour * Cabbage
Subject RIV: EF - Botanics
Impact factor: 1.527, year: 2011

The accumulation of total phenols (TP. Folin-Ciocalteu method) and total flavonoids (TF, colorimetric assay with AlCl(3)) and the evolution of antioxidant capacity (FRAP assay, DPPH and ABTS radical scavenging assays) have been monitored in juices of Croatian white cabbage (Brassica oleracea var. capitata) cultivars Varazdinski and Ogulinski, as well as Chinese cabbage (Brassica rapa var. pekinensis), at various developmental stages. Measurements were performed every four weeks, starting from planting to full maturity, throughout the course of eight months. In the first 8-12 weeks, the TP and TF contents as well as antioxidant capacity increased significantly in all analyzed juice samples and in most even doubled. This rapid increase was followed by a gradual decrease in values derived from all assays, over the course of 12-30 weeks, to the final values which were in all cases lower than the values measured at week 4.
Permanent Link: http://hdl.handle.net/11104/0202902