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Figure S1. CO2 assimilation rate (A) versus chloroplast CO2 concentration (Cc) at several measurement light intensities at 20 °C (a) and at 40 °C (b) in HL leaves. CO2 assimilation rate at 380 μmol mol−1 CO2 concentration (A380) at 25 °C is shown as a closed symbol. CO2 assimilation rate limited by RuBP carboxylation rate (Ac: solid line) was estimated from Eqn 1 in Materials & Methods, whereas CO2 assimilation rate limited by RuBP regeneration rate (Ar: dotted line) was estimated from Eqn 2 in Materials & Methods. J versus Cc curve at several measurement light intensities at 20 °C (c) and at 40 °C (d) in HL leaves. J at each Cc was calculated from Eqn 2. J at 380 μmol mol−1 CO2 concentration is shown as a closed symbol. Data represent means ± SE, n = 4.

Figure S2. Light dependence of J at several leaf temperatures in HL leaves. J were estimated from fitting of A-Cc curve. The light response curves of J were fitted by non-rectangular hyperbolic curve (Eqn 3, Table 2). Data represent means ± SE, n = 4.

Figure S3. Temperature dependence of Jmax divided by cyt f content in HL leaves. Data were fitted by Eqn 4 in Materials & Methods (June et al. 2004, broken line), and by the equation, Jg = 1.92 × exp(−0.5×(((Tg−26.42)/17.97) 2+((Ti−47.04)/19.38)2)), where Tg is the growth temperature and Tl is the leaf temperature (Bernacchi et al. 2003, solid line). In the latter case, the value was normalized at 25 °C.

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