Phenolic contents and antioxidant activities from different tissues of Baekseohyang (Daphne kiusiana)

• Published in: Food science and biotechnology Vol. 20; no. 3; pp. 695 - 702
• Main Authors: Lee, Jin Hwan, Seo, Weon Taek, Lim, Woo Jin, Cho, Kye Man
• Format: Journal Article
• Language: English
• Published: Heidelberg The Korean Society of Food Science and Technology 01.06.2011; 한국식품과학회
• Subjects: Chemistry; Chemistry and Materials Science; Food Science; Nutrition; Research Article; 식품과학; phenolic compound; antioxidant activity; leave; 75% methanol extract; HPLC
• ISSN: 1226-7708; 2092-6456
• DOI: 10.1007/s10068-011-0098-2

The aim of this research was to investigate the levels of phenolic compounds and antioxidant activities in different tissues including leaves, stems, and roots from baekseohyang ( Daphne kiusiana ). The highest contents of total phenolics (43.59 mg gallic acid equivalent, GAE/g) and flavonoids (15.73 mg rutin equivalents, RE/g) were observed in the 75% methanol extract of leaves. Moreover, this extract had the predominant antioxidant capacity, DPPH (85.91%) and ABTS (92.57%) radical scavenging activities as well as reducing power (7.20%) at a concentration of 5 mg/mL. The highest content of phenolic compounds was also exhibited in this extract with an increasing order in leaves, roots, and stems and their major components were vanillic acid (6.37 mg/g), tannic acid (1.91 mg/g), and p -hydroxybenzoic acid (3.96 mg/g). Thus, the strong antioxidant activities of the 75% methanol extract are correlated with high phenolic compound contents. This study suggests that baekseohyang leaves may potentially be used as an accessible source of natural antioxidants.