Abstract
The aerial part of Fagopyrum cymosum MEISN. was hydroponically cultivated for 6 days in the Houghland solution added with radioactive 14CH3COONa. Rutin isolated from the leaves was degraded into phloroglucinol and catechol portions, and the specific activity of the degradation fragments was determined. The result indicated that the acetate was directly and dominantly incorporated into phloroglucinol ring in the rutin molecule and an evidence for the head-to-tail linkage of acetate in the biosynthesis of phloroglucinol was provided. The catechol ring of rutin was suggested to be derived indirectly by a different route of biosynthesis.
