Influence of maize Lc regulatory gene on flower colour of transgenic tobacco and petunia

XY355 promoter, a petal-specific promoter, was amplified from the genome of rape(Brassica napus ) by PCR. The plant expression vector pXY60,which contained XY355 promoter and the maize Lc regulatory gene, was constructed. The vector was respectively transfered into tobacco(Nicotiana tabacum)and petunia(Petunia hybrida )by Agrobacterium tumefaciens-mediated method. The results of PCR analysis among these regenerated plants indicated that Lc gene was integrated into the genomes of transgenic tobacco and petunia, respectively. The flower color of transgenic plants had been changed, the color of transgenic tobacco was changed from light red to red and that of transgenic petunia was changed from white to light purple.