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Ruijia Zhu,Li Zhang,Tao Wei,Xuefei Jiang,Maolin Wang 한국식물학회 2023 Journal of Plant Biology Vol.66 No.5
A bidirectional promoter is an intergenic region between a pair of adjacent and oppositely transcribed genes (‘head-to-head’ genes) that concurrently initiates the expression of both genes. In this work, we identified a bidirectional promoter PBn265 with a 265 bp sequence between transcription initiation codons (ATG) of two genes encoding the homeodomain protein SHH2 and chloroplast GROUP II intron splicing factor CFM3, respectively, in genome of Brassica napus. The histochemical staining and fluorescence microscopy results demonstrated that PBn265 possess bidirectional promoting activity in the various tissues of the transgenic Arabidopsis thaliana. Notably, the bidirectional expression activities of PBn265 were significantly increased following red or blue light induction. Furthermore, the gene structure, ‘SHH2-BiP-CFM3’, appears highly conservative among various species in Brassicaceae. Considering its short sequence length, high sequence conservation and light-inducible properties, this promoter from Brassica napus most likely has application potential in bioengineering and agricultural molecular breeding.