Antioxidant Abilities, Phenolics and Flavonoids Contents in the Ethanolic Extracts of the Stems and Leaves of Different Stevia rebaudiana Bert Lines

作者：Zeng, Jianwei^*; Cai, Wenguo; Yang, Wenting; Wu, Wei

来源：Sugar Tech, 2013, 15(2): 209-213.

DOI：10.1007/s12355-013-0210-4

• Stevia rebaudiana
• Antioxidant ability
• Phenolics
• Flavonoids

We carried out a systematic research on antioxidant activities of ethanolic extracts of aerial parts (stems and leaves) of four selected Stevia rebaudiana lines. Total phenolics and flavonoids contents of different S. rebaudiana lines were in the range of 55.64-58.35 mg (gallic acid) g(-1) dw and 48.29-60.33 mg (rutin) g(-1) dw, respectively. The contents of phenolics and flavonoids, and antioxidant capacities in the leaves of S. rebaudiana were twofold to fivefold significantly higher than that in stems of S. rebaudiana. SR-3 had the highest total phenolics and flavonoids contents and the strongest scavenging abilities to DPPH and ABTS radicals. DPPH and TEAC assays were equal to evaluate the antioxidant ability of ethanolic extract of S. rebaudiana. The obtained results clearly indicated that the leaves of S. rebaudiana had an important value of utilization and development as a natural antioxidant agent and further studies for SR-3 should be put into practice.

• 出版日期2013-6
• 单位四川农业大学