科研之友
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摘要
The seeds of nine China-grown radish cultivars were analyzed for their phytochemical composition, antioxidant properties and ACE-inhibitory activity. Radish seeds contained 36.87-43.06% (w/w) oils, whereas 64.55- 69.26% of the fatty acids were monounsaturated and 20.33-25.11% were polyunsaturated. The levels of delta-tocopherol (552.24-670.31 mu g/g seed oils) and lutein (4.82-8.95 mu g/g seed oils) differed in cultivars. The nine cultivars varied in total phenolics, flavonoids, and free phenolic acids, but not in proanthocyanidins. Seed extracts of Hybrid #63, Tou Xin Hong, and Hybrid # 72 showed stronger DPPH radical scavenging capacity, ORAC, and FRAP than others (p< 0.05). The Yanzhi #2 extracts exhibited a strong ACEinhibitory activity, which was positively correlated with vanillic acid contents (r = 0.890, p = 0.001). It provides evidence on developing value-added utilization of radish seeds or seed fractions such as oil and flour as nutraceuticals or functional food ingredients.
