Figure 7.

CO₂-induced stomatal closure is strongly impaired in ost1 mutants. (A) Stomatal closure is impaired in ost1-3 mutant leaves in response to elevated [CO₂]. ^*P<0.05, Student's t-test. (B) Time-resolved relative stomatal conductance in responses to [CO₂] in ost1-3 mutant and wild-type Col-0 intact leaves (n=4 for each genotype). (C) Patterns of whole-plant relative stomatal conductance in responses to changes in [CO₂] in intact ost1-3 and Col-0 wild-type plants (n=8 for ost1-3, n=6 for WT) and (D) in intact ost1-1, ost1-2 and Ler wild-type plants (n=4 for each genotype). Imposed CO₂ concentrations are shown at the bottom. Data are mean±s.e.