Chemical constituents and antioxidant activities of essential oils from roots and rhizomes of Curcuma alismatifolia Gagnap. from Thailand

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Publication Details

Author list: Theanphong, Orawan;Mingvanish, Withawat

Publication year: 2017

Journal: The Journal of Applied Science (1513-7805)

Volume number: 16

Issue number: Suppl 1

Start page: 105

End page: 111

ISSN: 1513-7805

URL: http://www.journal.sci.kmutnb.ac.th/JournalVol/JournalVol.16No.SP/Paccon_p105%20to%20111.pdf

Abstract

The essential oils hydrodistilled from roots and rhizomes of Curcuma alismatifolia Gagnap. from Thailand were analyzed by GC-MS technique. (-)-Xanthorrhizol (52.37%) and - curcumene (42.00%) were found to be the major components in the root and rhizome essential oils, respectively. Antioxidant activities of both essential oils were evaluated using five different methods including DPPH radical scavenging assay, hydroxyl radical scavenging assay, hydrogen peroxide scavenging assay, ferrous ion chelating assay and ferric reducing power assay. Lascorbic acid and EDTA were used as a positive control. The DPPH radical scavenging activity and ferric reducing power of the root and rhizome essential oils were insignificantly different as compared with L-ascorbic acid while the hydroxyl radical scavenging activity of the rhizome essential oil was significantly higher than those for the root essential oil and L-ascorbic acid. The root and rhizome essential oils exhibited weaker activities for scavenging hydrogen peroxide molecules and chelating ferrous ions, as compared with L-ascorbic acid and EDTA, respectively.

Keywords

Curcuma alismatifolia