Determination of triterpenoids, carotenoids, chlorophylls, and antioxidant capacity in Allium ursinum L. at different times of harvesting and anatomical parts

摘要

Triterpenoids, carotenoids, chlorophylls, and antioxidant capacity of individual parts of wild garlic at different times of harvesting were studied. Leaves, flowers, bulbs, and stems of Allium ursinum were used in this study. The contents of triterpenoids, carotenoids, and chlorophylls were determined by UPLC-PDA-Q/TOF-MS, and the antioxidant capacity was determined by ABTS and FRAP assay. A total of 21 compounds including 3 triterpenoids, 11 carotenoids, and 7 chlorophylls were identified in anatomical parts of A. ursinum in March and June 2016. These compounds present in individual anatomical parts of wild garlic were determination in this study for the first time ever. The average content of total triterpenoids ranged from 750.7 to 4159.5 mg/kg dry matter (dm) and that of carotenoids and chlorophylls ranged from 14.4 to 14,424.5 mg/kg dm for bulbs and leaves. The average level of the antioxidant capacity ranged from 37.1 to 91.7 A mu mol Trolox/g dm in bulbs and leaves, respectively. The leaves, flowers, and stems of wild garlic are a good source of health-promoting compounds. They can be used as functional food ingredients, dietary supplements, and additives.