Patent ID: 7491811
Filing Date: 2009-02-17
Classification: C12N

Abstract:
1. A plant tissue-specific transcriptional regulatory system comprising a repressor protein coding sequence operably linked to a light activated aboveground plant tissue specific promoter, wherein the repressor protein comprises a nuclear translocation signal, and a functional sequence operably linked to a promoter sequence modified to comprise at least one operator sequence to which the repressor protein binds, such that the function sequence is expressed only in root tissue in which the repressor protein is not expressed, provided that the system comprises at least one sequence selected from the group consisting of the nuclear translocation sequence set forth in SEQ ID NO:9, the repressor protein set forth in SEQ ID NO:11, the regulated promoter sequence set forth in SEQ ID NO:12 and the mercury reductase coding sequence set forth in SEQ ID NO:13.