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Temperature responses of the apparent maximum capacity, Vmax, (a, b) and Michaelis-Menten constant Km (c, d) of isoprene synthase in hybrid aspen grown under control (day/night temperature 25/20 °C) and high temperature (35/27 °C) treatments. Data fitting and presentation as in Fig. 2. The optimum temperatures for Vmax were significantly different among the treatments (P < 0.05), while the optimum temperatures for Km were not (P > 0.3).
