| abstract |
The present invention relates to the use of DNA sequence motifs to regulate gene expression in a tissue- or developmental-specific manner in transgenic plants. The invention generally relates to the engineering and use of G-box related sequence motifs, specifically Iwt and PA motifs, which function as cis-elements of promoters, to regulate the expression of heterologous genes in transgenic plants. PA enhances high level expression in roots, low level expression in leaves and little or no expression in seeds. By contrast, Iwt confers preferential expression in seeds, but in a developmentally-regulated manner. |