PAL1 (phenylalanine ammonia-lyase 1, GenBank accession no. X16099), Cht1 (chitinase 1, D16221), and PR1a (acidic pathogenesis-related protein, AJ278436) showed 7- to 98-fold and 2- to 67-fold higher transcript levels in OsDR10-suppressed plants than in wild-type plants before and after bacterial infection, respectively. The gene discussed is CHIT1; the disease is bacterial infectious disease.