Chitinase that possesses antifungal activity (PubMed:23331415). Inhibits the growth of the fungal pathogen Rhizoctonia solani by degrading the fungal cell wall (PubMed:23331415). Does not possess inhibiting activity against fungal endo-1,4-beta-D-xylanases belonging to glycoside hydrolase family 10 (GH10) and family 11 (GH11) (PubMed:23331415). Involved in the regulation of plant growth by regulating the intracellular calcium ion concentration in roots (PubMed:28401568). Random endo-hydrolysis of N-acetyl-beta-D-glucosaminide (1->4)-beta-linkages in chitin and chitodextrins. Expressed in roots (PubMed:28401568). Expressed at low levels in leaf sheaths, stems and flowers (PubMed:28401568). Induced by infection with an incompatible race of the fungal pathogen Magnaporthe oryzae. Retarded growth of roots and shoots. Belongs to the peptidase A1 family.