Dynamics of growth/mature-related substances in vegetables using specific triple labelled compound

Dynamics and metabolism of sugar in tomato fruit was studied. The fruit was used after 20 days from anthesis. 14C-fructose (46.1 KBq/one fruit) was injected into fruit through peduncle. Then samples were kept at 20degC. After the constant time, the sample was divided into fruit and peduncle. Each part was extracted by ethanol and 14C was counted by a liquid scintillation counter. When 14C-fructose was introduced into fruit, sucrose was strayed for a short time and decreased gradually by degradation. Fructose transferred to sucrose after 5 min, and almost fructose were lost for 5 hours. In the peduncle, sucrose was synthesized from fructose after 0.5 hour. (S.Y.)