薬用植物栽培の植物化学的研究 (第11報)

チョウセンアサガオ葉のアルカロイド含量の時間的変化について

抄録

Daily componental variation in the leaves of Datura Tatula L. was examined by its flower pot cultivation under uniform conditions, picking the young and mature leaves at 5.00 a.m., and 12.30 and 8.00 p.m., when the plant growth was at its height. There were no variation in alkaloidal content on the amount of total and protein nitrogen in one day, while the content of all these components were higher in young leaves than the old. In other words, variation in the content of the alkaloid and amount of various forms of nitrogen showed the same tendency. There was no great variation in the ratio of hyoscyamine to scopolamine. On the contrary, daily variation of the sugars was extremely great and this phenomenon was extremely marked in oligosaccharides, the amount being small in the morning and increasing towards the night. However, no difference in the amount of sugars was observed between young and mature leaves.