I am working in the regulation of the nitrite-reductase-gen of the white
birch Betula pendula. The transcription of the gen is induced by light
and nitrate. EMSAs revealed a trans-acting-factor that binds in the
darkness to that promotor region, that is responsible for
light-induction, proved in transgenic plants. That would mean, that the
regulation is caused by a repressor, that binds to the LRE to inhibit
the transcription in the darkness.
Does anyone know something about darkness-repression of light-inducible
genes (personal research or literature).
Thanks for any answers. Hans Olaf