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Aim of the study was to evaluate antioxidant activity and total phenolic content of Achyranthes coynei; an endemic plant used in treatment of several diseases in the same lines that of Achyranthes aspera by traditional practitioners of Belgaum region. Efficiency of extraction methods was studied for aerial parts (leaves, stem, and inflorescence) extracted in methanol using continuous shaking, microwave assisted and ultra sonic extraction technique, by exposing it for different time period. Total phenolic content was measured by Folin-Ciocalteu method and antioxidant activity using 2,2'-diphenyl-1-picryl hydrazyl radical scavenging assay and ferric reducing antioxidant power assay. Extracts of A. coynei revealed highest yield of total phenolic content in continuous shaking method compared to other methods. Significantly higher amount of phenolic content (467.07±23.35 tannic acid equivalent and 360.83±18.04 caffic acid equivalent mg/100 g FW) was estimated at 360 min of continuous shaking extraction. In 2,2'-diphenyl-1-picryl hydrazyl radical scavenging assay and ferric reducing antioxidant power assay, inflorescence and leaf showed highest potential activity, respectively. Stem extracts showed lower yield of total phenolic content and antioxidant activity. Results also showed 2,2'-diphenyl-1-picryl hydrazyl radical scavenging assay had significant correlation with total phenolic content. This is first report of total phenolic content and antioxidant studies in A. coynei.

Phenolic contents and antioxidant properties from aerial parts of achyranthes coynei sant