Antioxidant and antimicrobial potential of costus woodsonii

Janet J.Y. Tan, Joash B.L. Tan, S. M. Lee, Y. Y. Lim

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The antioxidant and antimicrobial activity of the methanolic extracts of various plant parts of Costus woodsonii were evaluated. The total phenolic content and total flavonoid content in leaves and inflorescence extracts were higher compared to the rhizome and stem extracts. Highest total tannin content was noted in the inflorescence. Leaves extracts demonstrated the strongest 2,2-diphenyl-1-picrylhydrazyl scavenging and ferric reducing power activity (IC50 = 1.3 ± 0.2 mg mL−1; FRP = 3.8 ± 0.5 mg mL−1). Rhizome extract showed ferrous ion chelating activity with CC50 at 2.7 ± 0.3 mg mL−1. The leaves extract demonstrated antimicrobial activities against various Staphylococcus aureus strains (MIC: 0.625 mg mL−1 and 1.25 mg mL−1). Liquid chromatography-mass spectrometry (LCMS-MS) analysis showed that rutin and quercetin-3-galactoside were found in leaves; epicatechin in the inflorescences; and dioscin in the rhizomes.

Original languageEnglish
Pages (from-to)191-202
Number of pages12
JournalJournal of Herbs, Spices and Medicinal Plants
Issue number2
Publication statusPublished - 2020


  • Phytochemical screening

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