採集時間對基隆山藥（Dioscorea pseudojaponica Yamamoto）中皂X之影響   全文下載

Effect of Harvest Time on Saponins in Yam (Dioscorea pseudojaponica Yamamoto)

類固醇皂?包含furostanol 及 spirostanol glycosides，為山藥中重要的生理活性成份。本實驗測定自十一月至隔年三月間，不同月份採集之基隆山藥樣品之不同部位中的皂?含量。以採集時間而論，山藥各部位（除零餘子外）皂?含量多寡為：一月份> 十二份月份> 二月份> 十一月份> 三月份。自十二月份採集的零餘子其皂?含量比採集自一月份者多。以山藥器官中所含之最高皂?量進行排序，由高至低依次為塊莖皮（619.79 μg/g dw）> 塊莖肉（247.84 μg/g dw）> 零餘子（32.19 μg/g dw）> 葉（26.57 μg/g dw）> 藤（25.06 μg/g dw）。

Steroidal saponins including furostanol and spirostanol glycosides are the important bioactive compounds in yams. In the study, the content of individual saponin in varied organs of yam (Dioscorea pseudojaponica Yamamoto) harvested from November to March of the next year (the harvest season) were determined. Results showed that total saponin levels in yam organs (except rhizophor) harvested at various time were in the order: January > December > February > November > March. Saponin contents in rhizophor gathered in December were higher than those obtained in January. The highest total amounts of saponins among various organs were in the order: tuber cortex (619.79 μg/g dw) > tuber flesh (247.84 μg/g dw) > rhizophor (32.19 μg/g dw) > leaf (26.57 μg/g dw) > vine (25.06 μg/g dw).