Fig 3. Vector construction and GUS expression of different DFR promoter deletions.

Schematic representation of the size and position of each promoter construct used for transformation of rice (A), GUS expression patterns of DFR promoter constructs (B), GUS activity in deletion series of DFR promoter (C). GUS staining was detected as high levels in DEL1, DEL2, and DEL3, but not in DEL4 and DEL5.