Is thought to be an important plant defense-related product against fungal pathogens. Accumulation of the glucanase can be detected as early as 4 hours after inoculation. Hydrolysis of (1->3)-beta-D-glucosidic linkages in (1->3)-beta-D-glucans. In intact tissues. Following incompatible or compatible interaction with pathogenic bacteria, but not by wounding or salicylic acid. The induction is localized and does not seem to result from a systemic response. Induction occurs more rapidly with an incompatible interaction. The N-terminus is blocked. Belongs to the glycosyl hydrolase 17 family.