关键词: 鱼腥草, 不同部位, 生物活性物质, 抗氧化能力

Abstract: In order to understand the nutritional values of Houttuynia cordata， the CIE color values， bioactive compounds contents and antioxidant capacities among different organs （leaves， stems and rhizomes） in Houttuynia cordata were investigated in the present study. The results showed that significant differences were found among different tissues. The adaxial leaf surface and stems owned lower a* value and higher b* value， while the abaxial leaf surface was on the contrary， and the rhizomes had the highest L* value. The levels of chlorophyll， carotenoids， vitamin C， anthocyanins， proanthocyanidins， flavonoids， total phenolics and antioxidant capacities were followed as the trends of leaves> stems > rhizomes. Moreover， significant or extremely significant(P<005) positive correlations were found between antioxidant capacities and each bioactive compound. In addition， all the correlation coefficients associated with FRAP were higher than the corresponding values with ABTS， except proanthocyanidins. Then the levels of bioactive compounds and antioxidant capacities were compared between Houttuynia cordata with eight kinds of common vegetables. The results showed that Houttuynia cordata， especially leaves， contained more abundant bioactive compounds and antioxidant capacity， indicating Houttuynia cordata has great potential for development of functional vegetable.

Key words: Houttuynia cordata, different tissues, bioactive compounds, antioxidant capacities