Figure 1.

The acute response to light in dark-grown and light-grown seedlings. Video images integrating luminescence for 25 min were collected at the times indicated, and were analyzed to calculate luminescence levels, as detected photons per seedling per image. (A) Dark-grown cab::luc Arabidopsis exposed to 2 min red light at time 0 (open symbols) or maintained in dark (filled symbols). Data are representative of three experiments. (B) cab::luc Arabidopsis grown and imaged in LD12:12. Open box on time axis, light period; solid box, dark period.