Figure 4.
Carotenoid accumulation and PSY expression in plants with increased PAR1 levels. A, Carotenoids measured in wild-type (WT) plants and transgenic lines overexpressing a GFP-tagged PAR1 protein (PAR1-GFP). Plants were grown for 7 d under W and then treated with W+FR for the indicated times. The mean carotenoid level in W-grown wild-type plants was 105.17 µg g−1 fresh weight. B, PSY transcript levels quantified by qPCR analysis of RNA samples from the plants described in A. Values are shown relative to those in W-grown wild-type samples and correspond to means and sd of n = 3 experiments. Asterisks mark statistically significant differences (P < 0.05) relative to W-grown plants.