558ANTIOXIDANT PONTENTIAL OF METHANOLIC EXTRACT OF ROOT, CALLUS AND FRUIT EXTRACTS OF MYXOPYRUM SMILACIFOLIUM BLUMEThe aim of the present study was to compare the anti-oxidant efficacy of methanolic extract of root, callus and fruit of Myxopyrum smilacifolium Blume. The antioxidant activity was determined using three assays namely, Hydroxyl radical scavenging assay (HRS), 2, 2-diphenyl -1-picrylhydrazyl (DPPH) and Nitric Oxide scavenging assay (NOS). Its IC50 values were also determined. All the extracts showed considerable scavenging activity and significant activity against DPPH. Maximum scavenging activity was shown by root extracts against DPPH and NOS while fruit extracts against HRS. From the study it was concluded that the plant might be promising as a curative for many diseases associated with free radicalsPraveen_ker@rediffmail.comResearch612015Callus,Antioxidant,DPPH,IC50Praveen RP, Ashalatha S NairResearch Scholar, Department of Botany, University of Kerala, Karyavattom, Thiruvananthapuram-695581, Kerala, India, Professor, Department of Botany, University of Kerala, Karyavattom, Thiruvananthapuram-695581, Kerala, India.