Comparative study on in-vitro antioxidant activity of flowers and leaves of Plumeria Alba L.

Abstract

The present investigation was aimed to evaluate the phytochemicals and  invitro antioxidant activity of Plumeria alba L. Phytochemicals  were analysed  in aqueous and ethanolic extracts of flowers and leaves by qualitative method and the result confirmed the presence of alkaloids, sterols, terpenoids, flavonoids, amino acids, volatile oils, tannins and phenolic compounds etc., The invitro antioxidant property of  aqueous and ethanolic extract of both parts of Plumeria alba L. were evaluated  using total antioxidant capacity, reducing power assay,  hydrogen peroxide scavenging activity and nitric oxide scavenging activity. Among all the extracts, ethanolic flower extract showed highest antioxidant activity than other extracts. All the results were compared with standard ascorbic acid. In conclusion, the ethanolic extract of Plumeria alba L. flower possess high antioxidant activity which may be due to presence of high content of various phytochemicals.