Antimicrobial and Antioxidant Activities of Echinochloa colona (Linn.) Link and Sporobolus coromandelianus (Retz.) Kunth

作者：Ajaib Muhammad^*; Khan Khalid Mohammed; Perveen Shahnaz; Shah Shazia

来源：Journal of the Chemical Society of Pakistan, 2013, 35(3): 960-965.

• Antimicrobial
• Antioxidant Activities
• Echinochloa colona
• Sporobolus coromandelianus
• ABTS assay

Antimicrobial and antioxidant activities of two plants Echinochloa colona (Linn.) Link and Sporobolus coromandelianus (Retz.) Kunth, were carried out. The results revealed that the extracts of both plants were active against Gram positive bacteria, i.e. Staphylococcus aureus and Streptococcus pneumoniae and Gram negative bacteria, i.e. Escherichia coli and Pseudomonas aeruginosa as well as the fungal strains Aspergillus oryzae and Aspergillus niger. The most significant results were obtained from the methanolic and petroleum ether extracts of E. colona, i.e. 24 +/- 2.64 mm and 23 +/- 2.64 mm against S. aureus, respectively. A significant inhibition zone of 23.66 +/- 1.52 was observed by petroleum ether extract of S. coromandelianus. The chloroform extracts of S. coromandelianus showed an inhibition zone 72.33 +/- 4.09 mm against A. oryzae and 66.33 +/- 1.15 mm against A. niger. The antioxidant activity was evaluated using five approaches, i.e. 2,2'-azinobis(3-ethylbenzothiazoline)-6-sulphonic acid (ABTS) method; ferric reducing antioxidant power (FRAP) assay, metal chelating assay, total phenolic contents (TPC) and flavonoid contents. The results showed that the methanolic extracts of both plants possessed significant antioxidant activity. The results also indicated that methanolic extract of E. colona had total phenolic and flavonoid contents, i.e. 734.25 and 7774.54 mg/ml, however, methanolic extract of S. coromandelianus had phenolic and flavonoid contents, i.e. 366.75 and 3010.90 mg/ml.

• 出版日期2013-6