With genomic DNA from arabidopsis thaliana as the template,the stress-inducible promoter rd29A and XERICO gene,tissue-specific promoter PAL2 and Tyr-rich HRGP gene were cloned through specific PCR amplification.The plant expression vector with bivalent genes pbrd-XERICO-PAL2-tyr-rich HRGP-nos was constructed and it was introduced into agrobacterium tumefaciens EHA 105.