Abstract:

The concentrations of chlorophyll, anthocyanin and flavonoid in Ginkgo biloba leaf were assayed in 1999. The results indicate that there are two peaks of flavonoid content, one on July 4 and the other that has greater value on Nov.1. Chlorophyll shows a declining trend after reaching its peak value on June 13. Anthocyanin shares a similar trend with flavonoid, but its curve fluctuates larger than that of flavonoid. With the help of Microsoft Excel to deal with data, there is a significantly positive relationship between flavonoid and anthocyanin, a significantly negative relationship between flavonoid and chlorophyll.The regression equation,Y(flavonoid)=220.9558-0.7722X′₁(chlorophyll)+0.4343X′₂(anthocyanin), is statistically significant at the 1% level. How to regulate the flavonoid concentration on the physiological and biochemical viewpoints is discussed.

Key words: Ginkgo biloba leaf, Chlorophyll, Anthocyanin, Flavonoid