Chemical- and Cell-based Antioxidant Capacity of Methanolic Extracts of Three Commonly Edible Plants from Zingiberaceae Family

Abstract

Background: Edible plants belonging to the Zingiberaceae family display various antioxidative properties and widely used as folklore medicines. Three edible plants in Zingiberaceae family; namely Boesenbergia rotunda, Phaeomeria imperialis and Zingiber officinale were selected for secondary metabolites extraction using methanol. All crude extracts were investigated to evaluate their phenolics and flavonoids contents and further compare their antioxidant properties. Methods: Total phenolic content and total flavonoid content were evaluated using Folin-Ciocalteu method and Aluminium Complexation Reaction respectively. Conventional DPPH (2,2-diphenyl-1-picryl-hydrazyl), revolutionary CUPRAC (cupric ion reducing antioxidant capacity) and cellular antioxidant activity (CAA) in vitro assays were employed to evaluate the antioxidant activities of methanolic plant extracts for the first time. Results: DPPH and CUPRAC antioxidant assays resulted in similar trend to total flavonoid content in the order Z. officinale >P. imperialis>B. rotunda where as P. imperialis revealed highest phenols content and displayed highest CAA. Conclusion: Methanolic extract of Z. officinale showed highest free radical scavenging ability and hence flavonoids present may potentially act as natural source of antioxidant.

Elite hairy roots of Raphanus sativus (L.) as a source of antioxidants and flavonoids

“…Rao et al (2010) reported that the ability of the extracts to reduce Fe 3+ could be attributed to the number of hydroxyl groups in the phenolic and flavonoid compounds. Chiang et al (2017) reported that FRAP and DPPH radical scavenging ability could be attributed to the flavonoids present in plant extract of Zingiberaceae family.…”

Fingerroot (Boesenbergia pandurata) : A Prospective Anticancer Therapy

“…According to the traditional heritage, mentioned in a book published by AgroMedia (2007), fingerrot are often used to sprue, dry cough, skin diseases or diarrhea. The phytochemical content of the fingerroot rhizome has been used as antibacterial, anticancer, anti-inflammatory, and antioxidant (Zainin, et al, 2013;Udomthanadech, et al, 2015;Cheah, et al, 2011;Isa, et al, 2012;Chiang, et al , 2017).…”

Fingerroot, Boesenbergia rotunda and its aphrodisiac activity

“…The rhizomes of B. rotunda have been used as spices, flavoring agents, dyes and as traditional medicine. The uses or phytochemical properties of B. rotunda from several literature reviews are anti-allergic,[ 22 ] antibacterial,[ 23 24 ] anti- Helicobacter pylori ,[ 25 ] anti-leptospiral,[ 26 ] anticancer,[ 27 28 ] anti-inflammatory,[ 29 ] antioxidant,[ 30 ] antiulcer,[ 31 ] and anti-dengue viral,[ 32 33 ] and anti-herpes viral activities[ 34 ] and wound healing. [ 35 ] It also uses to treatment hepatic disease.…”