Figure 1.
The temperature responses of the rates of net CO2 assimilation
and Rd (a), stomatal conductance (b), and the partial pressure of Ci (c) in
F. bidentis wild type (•) and anti-RbcS (○
and 
). Photosynthesis was measured at a temperature- and
genotype-dependent PPFD that was just sufficient to saturate photosynthesis at
370 μbar CO2 and 200 mbar O2. Each point represents
the mean (± se) of measurements on five different leaves. Rd
was determined as the y intercept of the light response of
photosynthesis in the wild-type and 141-1 lines. Respiration did not differ
between genotypes, and pooled values are shown here. The relationship between
Rd and temperature is described by Rd =
3.76e–3 T2 +
5.74e–4 T +
8.56e–9 (where T is leaf
temperature [°C], R2 = 0.927). This was used to
correct the net assimilation for respiration in all ensuing calculations.