ANTIOXIDANT ACTIVITIES OF SOME WILD EDIBLE PLANTS OF MEGHALAYA STATE IN INDIA AND EFFECT OF SOLVENT EXTRACTION SYSTEM
Objective: The antioxidant activities of some wild edible plants of different botanical families growing in the Meghalaya state, India e. g the bulb of Dioscorea bulbifera, the underground stem of Homalomena aromatica, flowers of Phlogacanthus curviflorus, leaves of Medinilla erythrophylla, Ardisia humilis and fruits of Careya arborea, collected from Meghalaya state in India were Carried out.
Methods: The antioxidant activities of the plants were determined by using 1,1-diphenyl-2-picryl hydrazyl (DPPH) radical scavenging activity, ABTS radical scavenging ability, reducing power capacity, estimation of total phenolic content, flavonoid content and flavonol content. The solvent systems used were benzene, chloroform, acetone and methanol.
Results: The total phenolic content in the different extracts of the investigated plant samples ranged from 7.82Â±0.67 to 931.03Â±7.71 mg GAE/g dry extract. The highest amount of flavonoid (218.15Â±3.59 mg/g dry extract, Rutin equivalent) and flavonol (213.26Â±3.03 mg/g, Quercetin equivalent) were found in the acetone extract of A. humilis. In the present study the highest DPPH radical scavenging activity was shown by the acetone extract of M. erythrophylla (IC50 = 0.02Â±0.001 mg dry material). Thus the different levels of antioxidant activities were found in the solvent systems used.
Conclusion: The results indicate that these wild edible plants could be utilized as natural antioxidant.
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