The present invention provides a DNA fragment or promoter for expressing a
gene of interest light-repressibly or specifically in the dark.
A light-repressible promoter was obtained from the 5' upstream region of a
plant gene expressed light-repressibly or specifically in the dark, and
the function of said promoter was extensively analyzed to reveal a
cis-element sequence and a core sequence involved in light-repressible
expression. An expression cassette comprising a DNA fragment carrying
each of these sequences upstream of a gene of interest can be constructed
and transfected into a plant cell or a plant to provide a plant cell or a
plant that expresses the gene of interest light-repressibly or
specifically in the dark.
