Analysis and application of the main functional components and biological activity of the Cynanchum auriculatum Royle ex Wight leaf in different growth stages

ObjectiveThis study aimed to clarify the functional components and active effects of Cynanchum auriculatum Royle ex Wight leaves, and make use of C. auriculatum Royle ex Wight leaves as resources.MethodsTaking the leaves of C. auriculatum Royle ex Wight at different growth stages as the research material, the changes of the main functional components in the leaves of C. auriculatum Royle ex Wight were measured in three different stages: germination stage (May), growth stage (August) and deciduous stage (October). The antioxidant capacity and hypoglycemic activity of the leaves were analyzed and compared, and the leaves were used to make a leaf tea with health care functions.ResultsThe polysaccharide content and C21 steroid glycoside content in the leaves of C. auriculatum Royle ex Wight in May, August and October were 13.803, 3.064 and 3.809 mg/g, respectively, which were significantly lower than those in the roots of C. auriculatum Royle ex Wight. The flavonoid contents were 13.407, 17.776 and 2.022 mg/g, respectively, which were significantly higher than those of C. auriculatum Royle ex Wightroot. The inhibition rate of α-glucosidase and antioxidant capacity of August leaf extract were higher than those oftuber. C. auriculatum Royle ex Wight leaf tea has high content of active substances, which has antioxidant and hypoglycemic activities.ConclusionThe C. auriculatum Royle ex Wight leaves have high functional components and bioactive substances, making them highly valuable for use.