Indo acetic acid oxidase oxidase was extracted and estimated following (SINHAan d BASU 1981). Indo acetic acid oxidase was partially purified by (NH,),SO, saturation upto 95% level and by dialysis. Peroxidase and polyphenol oxidase were extracted and partially purified by (NH,),SO, saturation upto 95% level and by dialysis and estimated
following KAR and MISHRA(1 976). Oxidation of Indo acetic acid by peroxidase of the partially purified extract was estimated following( KOKKINAKanISd BROOKS 1979) with slight modification. In a test tube 1.5 ml of PO, buffer pH 6.8, I ml of 0.05 M hydrogen peroxide (H20z), 1 ml of diluted enzyme and I ml of 2 mM Indo acetic acid were taken and incubated for 1 h at 25 "C. The left over Indo acetic acid was estimated according to (ORDON and WEBER 195 1 ). The protein content in the enzyme extract was estimated following (LOWRYe t ul.1951).