Antioxidant and Antibacterial Activity of Parmotrema stuppeum (Taylor) Hale

AbstractLichens have been used medicinally across the globe and the medicinal property is related to the presence of secondary metabolites present in them. In the present study, the phenolic and flavanoid contents, percentage extractives, fluorescence analysis of extracts, in vitro antioxidant and antibacterial potential of Parmotrema stuppeum were evaluated. The total phenolic content of ethyl acetate and methanolic extracts were 44 mg/g and 44.30 mg/g respectively. Similarly the flavonoid contents were 3.75 mg/g and 4.26 mg/g respectively. The methanolic extract of the P. stuppeum showed higher DPPH radical scavenging activity. Further, the antibacterial activity was tested against seven pathogenic bacterial strains and the chloroform extracts which showed potential antibacterial activity against Bacillus cereus (18 mm) and Staphylococcus epidermidis (17 mm). The extracts were further subjected to column chromatography and 100% chloroform fraction showed significant antibacterial activity against Bacill...