sentence: Using the previously described method for mycoparasitic gene expression , the relative expression of antioxidant genes ( SOD , POD , and CAT ) and the expression level of plant defense-related genes [ tyrosine-protein kinase ( PR2 ) , PR1-2 pathogenesis-related protein , phenylalanine ammonia-lyase ( PAL ) , and chitinase class I ( CHIA1 ) ] were assessed by quantitative qRT-PCR .