Terpenoid Compositions, and Antioxidant and Antimicrobial Properties of the Rhizome Essential Oils of Different Hedychium Species

Abstract

A phytochemical study of the rhizome essential oils of four different Hedychium species was performed by means of GC and GC/MS analyses. H. ellipticum mainly contained 1,8-cineole, sabinene, and terpin-4-ol, while H. aurantiacum possessed terpin-4-ol, para-cymene, and bornyl acetate as the major entities. Similarly, trans-meta-mentha-2,8-diene and linalool were noticed in H. coronarium. Three different collections (I-III) of H. spicatum showed amazing differences in the relative contents of their essential oils, 1,8-cineole and 10-epi-gamma-eudesmol being identified as markers for samples I and II, terpin-4-ol and sabinene being the major compounds in sample III. The rhizome essential oils of the above species were studied for their antioxidant activities by different methods, including their effect on the chelating properties of Fe(2+), DPPH radical-scavenging activity, and reducing power. Antimicrobial screenings of the oils by the paper-disc method were performed against Staphylococcus aureus, Shigella flexneri, Pasteurella multocida, Escherichia coli, and Salmonella enterica enterica, and the respective minimum-inhibitory-concentration (MIC) values were determined. The rhizome essential oils from all Hedychium species exhibited moderate-to-good Fe(2+) chelating activity. H. spicatum from collection site III showed a completely different DPPH radical-scavenging profile than the samples from the other collection sites.

Approach of Ayurveda and Yoga in the Management of Occupational Lung Diseases

“…Bronchodilator, Expectorant, Anti-microbial activity Shati [36][37] [38] Hedychium spicatium Anti-asthmatic, Anti-oxidant, Reduces elevated eosinophilic count Tulsi [39] [40] Ocimum sanctum…”

Composition, antibacterial and anti-oxidant potentials of the essential oil of Hedychium matthewii

“…Essential oils obtained from H. spicatum, H. aurantiacum, H. coronarium and H. ellipticum exhibited good antioxidant potentials by quenching DPPH radicals and moderate to good Fe 2+ chelating activity and may perhaps afford protection against oxidative damage (Joshi et al, 2008). Flower and leaf oils of H. gardnerianum showed good antimicrobial activity against Staphylococcus aureus and Staphylococcus epidermidis (Medeiros et al, 2003).…”

“…Flower and leaf oils of H. gardnerianum showed good antimicrobial activity against Staphylococcus aureus and Staphylococcus epidermidis (Medeiros et al, 2003). The rhizome essential oil and solvent extracts of H. flavescens, H. venustum, H. ellipticum, H. aurantiacum and H. coronarium showed a broad spectrum antimicrobial activity (Joshi et al, 2008;Joy et al, 2007;Sabulal et al, 2007). Essential oil of H. spicatum is reported to possess antimicrobial and antioxidant activity (Bisht et al, 2006;Joshi et al, 2008).…”

“…The rhizome essential oil and solvent extracts of H. flavescens, H. venustum, H. ellipticum, H. aurantiacum and H. coronarium showed a broad spectrum antimicrobial activity (Joshi et al, 2008;Joy et al, 2007;Sabulal et al, 2007). Essential oil of H. spicatum is reported to possess antimicrobial and antioxidant activity (Bisht et al, 2006;Joshi et al, 2008). Therefore, Hedychium species not only have ornamental value but also have medicinal and industrial value.…”

Study of the phytochemical constituents and antibacterial activity against gram positive and gram negative bacteria of the rhizome oil of Hedychium Spicatum (Kapoor Kacchri)

“…It grows well in moist soil, sunny position and wide range of climatic conditions of forest margins 1,2 . Traditionally the rhizomes are used tranquiliser, hypotensive, antispasmodic analgesic, anti inflammatory, antimicrobial, antioxidant, antifungal, pediculicidal, cytotoxic and in respiratory disorders [3][4][5][6][7] .…”