FIGURE LEGENDS
Fig. 1 . Deuterium NMR spectrum of glucose derived from structural carbohydrates of S. fuscum . The integral of each peak is proportional to the abundance of the deuterium (D) isotopomers at the corresponding position in the glucose molecule (H1 – H6). The ratio of the isotopomer abundance of D6S and D6R corresponds to the photorespiration/photosynthesis ratio (Ehlers et al ., 2015).
Fig. 2 . D6S /D6R ratios and biomass production of S. fuscum incubated in the growth chambers at indicated atmospheric CO2, temperature, water table (WT) and light intensity settings. Solid and striped bars indicate low and high atmospheric CO2, respectively. LT and HT indicate low and high temperature, and LL and HL low and high light, respectively. (A) D6S /D6R isotopomer ratios reflecting the photorespiration/photosynthesis ratio and (B) daily biomass production during the two-month incubation period. Error bars indicate ± SE, n = 3. Different letters above error bars indicate significant differences (P < 0.05) according to Fisher’s least significant difference post-hoc test with Benjamini-Hochberg correction.
Fig. 3 . Physiological response variables of S. fuscumincubated in the growth chambers at indicated atmospheric CO2, temperature, water table (WT) and light intensity settings. Solid and striped bars indicate low and high atmospheric CO2, respectively. LT and HT indicate low and high temperature, and LL and HL low and high light, respectively. (A) whole-tissue δ13C values and (B) chloroplastic to ambient CO2(c c/c a) ratios, (C) whole-tissue C/N ratio and (D) N contents, (E) biomass density in total biomass dry weight per unit volume and (F) moss height increment. Error bars indicate ± SE, n = 3. Different letters above error bars indicate significant differences (P < 0.05) according to Fisher’s least significant difference post-hoc test with Benjamini-Hochberg correction.
Fig. 4 . D6S /D6R ratios, biomass production, density and height increment of S. majusincubated in the growth chambers at indicated atmospheric CO2 and water table (WT) settings. Data were obtained for the high temperature and low light treatment. Solid and striped bars indicate low and high atmospheric CO2, respectively. (A) D6S /D6R isotopomer ratios reflecting the photorespiration/photosynthesis ratio, (B) daily biomass production during the two-month incubation period, (C) biomass density in total biomass dry weight per unit volume and (D) moss height increment. Error bars indicate ± SE, n = 3. Different letters above error bars indicate significant differences (P < 0.05) according to student’s t-test.