Root specific gene promoter

Abstract

Disclosed is an isolated DNA molecule comprising a DNA promoter sequence, the RB7 promoter sequence, which is capable of directing root-specific transcription of a downstream structural gene in a plant cell. Also disclosed is a DNA construct comprising an expression cassette, which construct comprises, in the 5' to 3' direction, a promoter of the present invention and a structural gene such a gene coding for an insect toxin positioned downstream from the promoter and operatively associated therewith. Transformed plants, such as tobacco plants, which comprise transformed plant cells which contain a heterologous DNA construct comprising an expression cassette as described above are also disclosed.

Dependencies are inferred from the claim text.