Eleven pathogenesis relatd proteins (PR-proteins) were detected in rubber (Hevea brasiliensis) tree infected with Phytophthora meadii. New anionic peroxidase (PR-9 proteins) appeared in the tolerant interaction. Induction of PR-proteins is correlated with resistant interactions between H. brasiliensis and P. meadii. Two proteins corresponding to molecular weights 29kD and 33kD were prominent in expression in the tolerant plants 24 h after inoculation with the fungal pathogen. In vacua infiltration studies revealed the presence of similar proteins in the intercellular fluids, obtained from leaves. New anionic peroxidase bands appeared in the resistant plants during interaction with the pathogen. Similar changes in the protein induction were observed on treatment with salicylic acid.The results indicate an induction of tolerance in tolerant Hevea plants when challenged with P. meadii.