Abstract
We established a system in which anthocyanin synthesis of regenerated torenia shoots, which derived from the leaf discs in vitro, was induced on the medium containing high concentration of sucrose. In this system, ABA could also induce anthocyanin synthesis on the medium containing low concentration of sucrose. Changes in the amount of endogenous ABA in the regenerated shoots inducing for the anthocyanin synthesis on the medium containing high concentration of sucrose were determined. It is revealed that the amount of endogenous ABA transiently increased just before the induction of anthocyanin synthesis, suggesting that change in the amounts of endogenous ABA may play an important role in the induction of anthocyanin synthesis in regenerated torenia shoots.
