Abstract:Xingjiang melon (Cucumis melo L.) was treated respectively with elicitors from culture filtrate (El) and mycelial walls (Ew) of Colletotrichum langenarium. Activities of phenylalanine arnmonialyase (PAL) and peroxidase (POD) were significantly higher in the treated pNnts. The effect of inducement was higher with El than with Ew. A new protein from plants treated with El was found on 5-20% polyacrylamide gel gradient electrophoresis. The Rf value of the new protein was 0.7-0.75. But no new protein was found in plants treated with Ew.