A differentially expressed gene fragment was isolated from TuMV-infected seedling leaves of non-heading Chinese cabbage (Brassica campestris ssp.chinensis Makino) through cDNA-AFLP technique.The full-length cDNA of this gene,named BcLRK01,is 2 124 bp in size and encodes a leucine-rich repeat receptor-like kinase with 707 amino acids.Real time PCR was performed to detect its expression patterns under TuMV infection and the inductions of high salinity,cold,salicylic acid (SA),jasmonate acid (JA) and ethylene (ET). The results showed that all the treatments induced the expression of this gene significantly in different extents,which indicate that it may be a pathogenesis-related gene of virus disease in non-heading Chinese cabbage and involves in the signaling pathways of high salinity,cold,SA,JA and ET.