@article{Goswami_Akter_Nandi_Banu_Akter_Afrin_Habib_Khan_2020, title={Antioxidant and Antibacterial Activities of Four Local Medicinal Plants}, volume={30}, url={https://www.banglajol.info/index.php/PTCB/article/view/50688}, DOI={10.3329/ptcb.v30i2.50688}, abstractNote={<p>Potential antioxidant and antibacterial activity of methanolic, chloroformic and n-hexane leaf extracts of four local important medicinal plants like <em>Ocimum americanum</em>, <em>O. basilicum, O. gratissimum </em>and <em>Centella asiatica </em>was investigated<strong>. </strong>The methanolic leaf extracts of these plant species exhibited the potent DPPH free radical scavenging activity (IC<sub>50</sub> value, 2.67 ± 0.01, 14.17 ± 0.11, 60.22 ± 0.01 and 2.39 ± 0.025 μg/ml, respectively). Methanolic leaf extract of <em>C</em>. <em>asiatica </em>showed strongest antioxidant activity. Chloroformic leaf extracts possessed moderate antioxidant activity (IC<sub>50</sub> value of 79.44 ± 0.05, 110.56 ± 0.02, 54.95 ± 0.05, 101.0 ± 1.0 μg/ml, respectively) in all samples. The lowest antioxidant activity was recorded from <em>n</em>-hexane leaf extracts of <em>O. americanum, O. gratissimum</em>, <em>C. asiatica </em>and <em>Ocimum basilicum </em>(IC<sub>50</sub> value 147.87 ± 0.06, 378.19 ± 2.65, 104.65 ± 0.39, 467.58 ± 0.52 μg/ml, respectively<strong><em>)</em></strong><em>. </em>Methanolic and chloro-formic leaf extracts showed antibacterial activity against both Gram-positive and Gram-negative pathogenic bacteria, namely <em>Bacillus megaterium</em>, <em>Escherichia coli, Pseudomonas aeruginosa </em>and <em>Salmonella typhi</em>. Methanolic leaf extract of <em>O. americanum </em>and chloroformic extract of <em>C. asiatica </em>showed excellent antimicrobial activity.</p> <p>Plant Tissue Cult. & Biotech. 30(2): 179-187, 2020 (December)</p>}, number={2}, journal={Plant Tissue Culture and Biotechnology}, author={Goswami, Barna and Akter, Shamoly and Nandi, Nemai Chandra and Banu, Tanjina Akthar and Akter, Shahina and Afrin, Sadia and Habib, Ahashan and Khan, Salim}, year={2020}, month={Dec.}, pages={179–187} }