Figure 1.
The CO 2 insensitive 1 (cis1) mutant displays a lower leaf surface temperature under elevated CO 2 than wild‐type (WT) Arabidopsis. (a) Infrared thermograms showing that the leaf surface temperature of the cis1 mutant is lower than that of WT when the plants are exposed to 1500 ppm CO 2. (b) The average leaf surface temperature of the cis1 mutant is c. 0.68°C lower than that of the WT plant when both are exposed to 1500 ppm CO 2. Bars are mean ± SE (Student's t‐test, **, P ≤ 0.001, n = 20). (c) In contrast with WT, the cis1 mutant fails to display elevated (800 ppm) CO 2‐induced reduction in stomatal conductance, but exhibits a WT response when exposed to low (100 ppm) CO 2. Bars are mean ± SE (representative data, n = 4). (d) Relative stomatal conductance in (c). Bars are mean ± SE (representative data are presented, n = 4).