Two biotic stress resistance related genes from the full-length cDNA library of cv. Osome were identified from EST analysis and determined to be pathogenesis-related (PR) 12 defensin-like family protein () and PR-10 allergen family protein () after sequence analysis and homology study with other stress resistance related same family genes. In the expression analysis, both genes expressed in different organs and during all developmental growth stages in healthy plants. Expression of significantly increased and gradually decreased after infection with subsp. in Chinese cabbage Expression of these two genes significantly changed after cold, salt, drought and ABA stress treatments. These two PR genes may therefore be involved in the plant resistance against biotic and abiotic stresses.