PRELIMINARY PHYTOCHEMICAL SCREENING AND ANTIOXIDANT PROPERTIES OF LINOSTOMA DECANDRUM

Abstract

Linostoma decandrum is a rare species, and this study is the first to report its phytochemical screening and antioxidant properties. As a result, the ethanol extracts isolated from the leaves and stems of this plant contain many bioactive components such as phenol, tannin, flavonoid, alkaloid, saponin, coumarin, terpenoid, and steroid. The leaves extract includes the total flavonoid, polyphenol, and triterpene contents of 98.06 mg QE/g DW, 43.28 mg GAE/g DW, and 6.35 mg OAE/g DW, respectively. In comparison, 16.90 mg QE/g DW, 26.03 mg GAE/g DW, and 4.51 OAE/g DW were the total flavonoid, polyphenol, and triterpene contents in the stem extract. The leaves and stem extract showed the DPPH radical-scavenging activities with IC₅₀ values of 0.45 and 0.68 mg/mL, respectively.