Fig. 4.
Temperature dependencies of isoprene emission rate (a, b) and the isoprene synthase substrate dimethylallyl diphosphate (DMADP) pool size (c, d) per unit leaf area (a, c) and per unit leaf dry mass (b, d) in hybrid aspen in dependence on growth temperature conditions, control (day/night temperature 25/20 °C) vs. high temperature (35/27 °C). Measurement conditions and data presentation as in Fig. 2. The optimum temperatures for isoprene emission and DMADP pool size were not significantly different among the treatments (P > 0.1 for both).
