Abstract
The experiment was carried out to determine the environmental factors which could affect the anthocyanin synthesis and sugar content of Cichorium intybus L. var. foliosum. The major pigment of purified aglycone of C. intybus was identified as cyanidin by TLC and HPLC analysis. It was concluded that the anthocyanin synthesis of C. intybus was promoted at low temperature and high light intensity and enhanced in the UV-transmission treatment compared to the UV-cut treatment. Furthermore, it seemed that suger accumulation played an important role in anthocyanin synthesis.