How cellular genetic programs are regulated by environmental cues is a fundamental question in biology. Our lab uses the light-dependent plant seedling development as a model system to address this question. In particular, we focus on two research areas: (1) To understand the function of light-dependent subnuclear organization in light signaling. (2) To investigate the molecular mechanism by which light triggers chloroplast differentiation. We use a combination of genetics, biochemical, and cell biological approaches.