Composition and Antioxidant Activities of Volatile Organic Compounds in Radiation-Bred Coreopsis Cultivars

). The volatile compounds were characterized via gas chromatography-mass spectrometry (GC-MS) and 50-59 oils representing 95.3-96.8% of the total volatile compounds in these flower materials were identified. "Golden ring" contained a high amount of fatty acids (38.13%), while "pumpkin pie" and "snow chrysanthemum" teas were rich in aliphatic amides (43.01%) and esters (67.22%), respectively. The antioxidant activities of the volatile oils of these cultivars were evaluated using 1,1-diphenyl-2-picrylhydraxyl (DPPH) and 2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging assays. The volatile extract of "golden ring" showed higher antioxidant activities compared with the extracts of the other cultivars. Therefore, "golden ring" can be used for further development as a raw material for tea manufacture or as a dietary supplement.