Phloem-loading-specific promoter

摘要

The present invention relates to DNA promoters which, in nature, drive expression of an enzyme of the raffinose family oligosaccharide pathway and are capable of inducing expression of a protein encoded by a DNA molecule operably associated with such promoters. These DNA promoters cause the protein to be expressed in minor vein phloem of a mature plant leaf, with substantially no expression of the protein elsewhere in the leaf of the plant. The present invention also relates to the use of such DNA promoters in transgenic plants or plant seeds.