Polyphenolic characteristics, antimicrobial and antioxidant activity of Zingiber neesanum (Graham) Ramamoorthy rhizomes and identification of volatile metabolites by GC-MS analysis

Nat Prod Res. 2021 Sep;35(17):2947-2951. doi: 10.1080/14786419.2019.1677654. Epub 2019 Oct 17.

Abstract

Rhizomes of Zingiber neesanum (Graham) Ramamoorthy, endemic to Western Ghats and subject to few studies, were analysed for bioactivity and phytochemical composition. High total tannin (TT) content in isopropanol extract [55.261 ± 6.623 mg TAE.100 g-1 DW] contributed to antimicrobial activity against gram negative Enterococcus fecalis (21.7 ± 0.6 cm) while high total flavonoid (TF) content in ethyl acetate extract [681.94 ± 33.87 mg CE.100 g-1 DW] accounted for the antifungal activity against Mucor rouxii (9.7 ± 0.6). Isopropanol extracts also showed high anti-oxidant activity as determined by DPPH and FRAP assays. Major bioactive phytochemical constituents in Z. neesanum rhizome identified by GC-MS analysis included 2-Methyl-7-nonadecene (13.99%; antimicrobial), Actinomycin C2 (8.57%; antineoplastic) and Deoxyspergualin (12.55%; immunosuppressive).

Keywords: GC-MS; Zingiber neesanum; antimicrobial; polyphenolics.

MeSH terms

  • Anti-Infective Agents* / pharmacology
  • Antioxidants* / analysis
  • Antioxidants* / pharmacology
  • Enterococcus faecalis / drug effects
  • Gas Chromatography-Mass Spectrometry
  • India
  • Mucorales / drug effects
  • Phytochemicals / isolation & purification
  • Phytochemicals / pharmacology
  • Plant Extracts / pharmacology
  • Polyphenols / isolation & purification
  • Polyphenols / pharmacology*
  • Rhizome / chemistry
  • Zingiberaceae / chemistry*

Substances

  • Anti-Infective Agents
  • Antioxidants
  • Phytochemicals
  • Plant Extracts
  • Polyphenols

Supplementary concepts

  • Amylomyces rouxii