モロヘイヤ(Corchorus olitorius)の生育過程におけるストロファンチジン配糖体及びジギトキシゲニン配糖体の消長

抄録

Contents of strophanthidin and digitoxigenin glycosides in a growing stage of Corchorus olitorius (Moroheiya) were investigated in order to ensure a safety of C. olitorius and its products. Total contents of strophanthidin glycosides were scarcely changed, but those of digitoxigenin glycosides were gradually decreasing in the period from sproutings to seed leaves (1-11 days after seeding). About 80 % of strophanthidin glycosides were detected in seed leaves during the period from seed leaves to four leaves (8-25 days after seeding). Both glycosides were not detected in leaves, stems, roots and buds in the period of harvesting (93 days after seeding) and budding (106 days after seeding). Both strophanthidin and digitoxigenin glycosides in fruits were not detected for 20 days after blooming, but were detected 35 days after blooming. It is difficult to distinguish safe fruits from not safe ones on visual observation in this period. Therefore, it is neccessary to pay atttention not to contain fruits in edible leaves. Strophanthidin glycosides were first detected 35 days after blooming and then increase to reach plateau 60 days after blooming. Digitoxigenin glycosides were detected 35 days after blooming and then no apparent increase was observed over experimental period.