Fig. 1

Effects of different light conditions on the photosynthesis system of T. chinensis. A Phenotype of young T. chinensis plants under different light intensity (high light [HL, 13,000 lx], medium light [ML, 10,000 lx], and low light [LL, 7,000 lx]) treatments. B The content of chlorophyll a and C chlorophyll b in leaves of T. chinensis under different light intensity treatments. Data shown are the average mean ± SE of three replicates (n = 3). Different letters above the bars indicate statistical significance at P < 0.05 level among different treatment groups according to Tukey’s test. D The maximum quantum yield (Fv/Fm) in leaves of T. chinensis under different light intensity treatments. Data shown are the average mean ± SE of three replicates (n = 3). E Ultrastructure of T. chinensis chloroplasts of different light intensity treatments. T, OG, and SG indicate the thylakoid lamellae, osmiophilic globule, and starch grain, respectively. Scale (1 μm, 0.2 μm, and 10 μm)