Changes of antioxidant activity and bioactive compounds of Acer tegmentosum stem at different harvest time

We investigated the antioxidant activity, total phenolics, free sugar and bioactive compounds content in Acer tegmentosum stem at different harvest times. A. tegmentosum has been used as a traditional medicine in Asia. In general, the stem of A. tegmentosum is used for treating traumatic bleeding, and the leaves and stem were used to treat liver disease such as hepatitis, cirrhosis, liver cancer and diabetes. In our study, we used A. tegmentosum stem to measure the phenolic compounds, free sugars and antioxidant activity. We report changes in the overall antioxidant activity and phenolic compounds at different harvest times. We aim to increase the understanding and knowledge of these changes, which may be useful for optimal harvest timing. Using HPLC with a diode-array detector, three phenolic compounds including salidroside, (-)- catechin and (-)-epicatechin gallate were evaluated. A. tegmentosum stem samples used in this study were grown in Uljin, Korea, during May – September. The results findings were that the samples contained salidroside from 46.26 to 61.48 mg/g, (-)-catechin from 2.83 to 3.41 mg/g and (-)-epicatechin gallate from 0.75 to 1.10 mg/g. In our research, the free-radical scavenging activities of five samples (harvested from May to September) were 51.39, 51.43, 54.10, 57.15 and 70.08% at 40 ug/mL, respectively. Total phenolic content in A. tegmentosum stem harvested at different times were 457.1, 446.4, 466.6, 468.1 and 482.6 mg/g, respectively. Glucose, raffinose, fructose and sucrose were the major sugar components of A. tegmentosum stem. We also observed that sucrose and raffinose content increased during May – September.

 

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Publication History

Article published online:
16 November 2023