Abstract
Phytochrome is one of the major photoreceptor families in plants and regulates flowering mechanism. It is known that phytochrome translocates from the cytoplasm into the nucleus in a light-dependent manner and transmits a signal. However, the detail of the phytochrome-mediated signaling mechanism in the late-vegetative phase remains unknown. The VOZ (Vascular plant One-Zinc finger) protein, first reported as a transcription factor, was isolated as a phytochrome-interacting factor by yeast-two hybrid screening, using a cDNA library derived from bolting Arabidopsis plants. Arabidopsis possesses two VOZ genes, AtVOZ1 and AtVOZ2, and voz1 voz2 double mutant showed late-flowering phenotype under long-day condition. Previous analysis revealed that VOZ functions downstream of phyB and that VOZ upregulates the FT mRNA level. Here we report the intracellular localization of VOZ under different light quality conditions, using lines expressing GFP-VOZ2 fusion protein.
