Figure 3.

Leaf gas-exchange parameters as a function of cytochrome b₆f complex content in wild-type (black circles) and anti-b/f (white circles) tobacco. A, CO₂ assimilation rate. B, Stomatal conductance. C, The ratio of intercellular to ambient CO₂ (C_i/C_a). Leaf cytochrome b₆f complex content was determined from immunoblots such as the one shown in Figure 1 and is expressed as a fraction of the maximum wild-type value. Gas-exchange experiments were performed as described in Figure 2. Each point corresponds to a leaf from a different plant.