Figure 5 Recovery of leaf gas exchange variables following heatwave stress in cotton plants. Rates of light saturated photosynthesis (Asat; panel a, b), stomatal conductance (gs; panel c, d) and leaf carbon balance (Asat-Rn; panel e, f) were measured after plants were placed under their prevailing growth temperature for two days following the 5-day heatwave treatment. Bars indicate mean value for each treatment combination and error bars represent standard error of mean (n=5). Thermal regimes characterized by different daytime temperature (i.e. 32/22oC and 32/26oC) are indicated by hatched bars.