Anthoxanthins and Anthocyanins in the Oryzaceae, I

Abstract

Tricin and its glycosides together with chlorogenic acid occur in the leaf and grown colored awn in rice, but in the white awn, tricin alone occurs. Tricin and its glycosdie (Fraction B) are most widely destributed among the varieties examined. Chrysanthemin, (cyandidin 3-glucoside), keracyanin (cyanidin 3-rhamoglucoside), cyanin (cyanidin 3, 5-glucoside) and uliginosin (malvidin 3-galactoside) are identified in the anthocyanin pigments at different parts of the plant. They occur singly or co-occur at particulat colored parts. Uliginosin occurs only in the pericarp of purple colored grain of particular varieties. Uliginosin and chrysanthemin, also chrysanthemin and keracyanin co-occur respectively in the purple colored preicarp of grin in two and one varieties. Chrysanthemin and keracyanin co-occur in the leaf blade, sheath, glumes, apicules, awn and stigma of many varieties. Chrysanthemin, keracyanin and cyanin co-occur in the leaf sheath, and culm internodes of a particular variety.