Fig. 4From: Analyses of the photosynthetic characteristics, chloroplast ultrastructure, and transcriptome of apple (Malus domestica) grown under red and blue lightsEffects of Different Light Quality on Carbon and Nitrogenous metabolism. a and b The content of soluble sugar and starch in apple leaves after different light quality treatments. c and d Sucrose phosphate synthase (SPS) and Sucrose synthase (SS) activities in apple seedlings under different light quality. e and f The content of nitrate nitrogen and ammonium nitrogen in apple leaves after different light quality. g to i Glutamate dehydrogenase (GDH), glutamate synthase (GOGAT), and nitrate reductase (NR) activities in apple seedlings under different light quality. Values are means ± standard deviation (SD) of three independent biological replicates. The uppercase letter indicates a very significant difference at the 1 % level (P < 0.01), and the lowercase letter indicates a significant difference at the 5 % level (P < 0.05)Back to article page