Antioxidant and antibacterial activities of lichen Usnea ghattensis in vitro.
Various solvent extracts of the lichen Usnea ghattensis showed good antioxidant activity. A methanol extract prevented lipid peroxidation by 87% followed by 65% in Trolox at 20 microg/ml. It also showed superoxide anion scavenging activity and free radical scavenging activity 56% and 73%, respectively. The known antioxidants butylated hydroxytoluene (BHT), butylated hydroxyanisol (BHA) and quercetin at similar concentrations showed superoxide anion scavenging activity of 68, 59 and 47% and free radical scavenging activity 83, 77 and 69%, respectively. In addition, these extracts were inhibitory against Bacillus licheniformis, Bacillus megaterium, Bacillus subtilis and Staphylococcus aureus with MIC values of 5-10 microg/ml.
Behera
B C
BC
Agharkar Research Institute, G.G. Agarkar Road, 411 004, Pune, India. bcbehera2002@yahoo.co.in
Verma
Neeraj
N
Sonone
Anjali
A
Makhija
Urmila
U
D000900:Anti-Bacterial Agents / Q000737:chemistry*; D002084:Butylated Hydroxytoluene / Q000737:chemistry; D016166:Free Radical Scavengers / Q000737:chemistry*; D006094:Gram-Positive Bacteria / Q000187:drug effects* / Q000254:growth & development; D015227:Lipid Peroxidation; D008826:Microbial Sensitivity Tests / Q000379:methods; D010084:Oxidation-Reduction; D010936:Plant Extracts / Q000737:chemistry*; D013481:Superoxides / Q000737:chemistry; D020949:Usnea / Q000737:chemistry*
D000900:Anti-Bacterial Agents; D016166:Free Radical Scavengers; D010936:Plant Extracts; D013481:Superoxides; D002084:Butylated Hydroxytoluene