During the early stages of the haustorium development in Cuscuta reflexa Roxb. The enzyme is found to be accumulated at the region of contact between host and parasite. As the haustorium matures, the enzyme concentration appears to be less in the upper region of the haustorim. In Santalum album L. the enzyme activity was more pronounced in the early stages at the region of contact between the host and parasite and also in the vascular core of the endophyte. Further the concentration gradually decreases as the haustorium becomes older. Guaiacol and Benzidine are used to localize peroxidase activity.