Figure 7. mRNA levels of xanthophyll cycle-related genes upon white, blue or red light stimulation.
48-hour-dark-adapted P. tricornutum cells were exposed to 175 µmol m−2 s−1 continuous white light, or 25 µmol m−2 s−1 continuous blue or red light and the relative transcript levels of ZEP1 (A), ZEP2 (B), ZEP3 (C), VDE (D), VDL1 (E) and VDL2 (F) were determined after 1, 3, 5, 8 and 12h by qPCR using H4 as a reference gene. The values were normalized to the transcript levels in the dark. Data are averages of triplicate measurements. The error bars represent standard deviation.