作者
Asmat Ullah, Kainaat William, Attika Rehman, SW Khan, Zafar Iqbal
发表日期
2015/1/1
期刊
Journal of Animal and Plant Sciences
卷号
25
期号
3
页码范围
580-586
出版商
Pakistan Agricultural Scientists Forum
简介
Present study investigates the distribution, antibacterial, antioxidant, antitumor and cytotoxicity of the acetone and methanol extracts of ten lichen genera of Dermetacarpon, Peltigera, Flavopunctelia, Flavoparmelia, Lecanora, Cladonia, Caloplaca, Collema, Rhizocarpon, Usnea of Himalayan region (Mansehra) Pakistan. The bacterial strain used in this study was Staphylococcus aureus, Staphylococcus epidermidis, Staphylococcus bacillus, Pseudomonas aeroginosa, Escherichia coli and Enterococcus faecalis. The antibacterial activity of the lichen extract in both solvent was studied by Disc diffusion assay. The zone of inhibition of these lichen extracts were in range 7 to 12.7 mm in diameter. This study showed that S. bacillus is the most resistance and S. epidermidis is the most sensitive bacteria to the extract of all lichen genera. The antioxidant activity was investigated by 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging. The acetone extract in concentration of 1000ug/ml of Collema showed strongest DPPH radical scavenging activity while other acetoneextracts also showed positive results. However, Rhizocarpon showed the least DPPH radical scavenging activity. Cytotoxic activity of different concentration of lichen extract was tested against Brine shrimp, Artemianauplii. Result of cytotoxicityindicated that both methanol and acetone extract of Flavopunctelia were potent against brine shrimp. In potato disc assay, most of the acetone and methanol extracts of lichens showed significant (inhibition≥ 20%) antitumor activity against Agrobacterium tumefacien. Similarly, both acetone and methanol extracts ofDermetocarpon showed maximum …
学术搜索中的文章