Table 2: Linear regression analysis of response to vapor pressure deficit based on the results from the High Temperature experiment. The number of data for each cultivar is listed in the column labeled and the data are followed by the standard error of the mean. For those cultivars represented by the two-segment regression, slope 1 is for the regression segment below the breakpoint and slope 2 is for the regression above the breakpoint. Break point values followed by the same letter are not significantly different based on their confidence limits.