Figure 4.

Effects of exogenous zeaxanthin on antioxidant enzyme activities and related gene expression in pepper leaves under low temperature combined with low-light stress. (A) SOD activity; (B) POD activity; (C) CAT activity; (D) CaSOD relative expression; (E) CaPOD relative expression (F) CaCAT relative expression. CK: the pepper was sprayed with distilled water under normal conditions, CK + Z: the pepper was sprayed with zeaxanthin under normal conditions, LL: the pepper was sprayed with distilled water under low temperature combined with low-light stress, and LL + Z: the pepper was sprayed with zeaxanthin under low temperature combined with low-light stress. The values were presented as means ± standard deviations (SDs; n = 3). The different letters above bars indicated significant difference at p < 0.05 in the same period among treatments.