Page "Chitinase" Paragraph 4

Chitinases are also present in plants ( barley seed chitinase:, ); some of these are pathogenesis related ( PR ) proteins that are induced as part of systemic acquired resistance.

Expression is mediated by the NPR1 gene and the salicylic acid pathway, both involved in resistance to fungal and insect attack.

Other plant chitinases may be required for creating fungal symbioses.