Figure 7.

Comparison of response speeds for mesophyll conductance and the maximum rate of RuBP carboxylation in tobacco after changing from short or long periods of darkness to high light. The time taken for mesophyll conductance (g_m) (A), and the maximum rate of RuBP carboxylation (V_cmax) (B) and electron transport (J) (C) to reach 50% (t₅₀) and 90% (t₉₀) of their maximum value was compared between inductions under high light after darkness for 60 min or 5 h following illumination for more than 1 h, or overnight darkness. The vertical bars on each plot indicate the standard error with 3–6 replicate leaves for tobacco. Different letters on each column indicate significant variation in t₅₀ or t₉₀ of three parameters at P < 0.05 according to Tukey–Kramer test.