## 3 Results
** & **(\(\mu\)l l\({}^{-1}\) h)** \\ \hline
26 Apr.–22 Nov., & CF & 4.4 & (0.4) & 4.6 & (0.4) & 7.4 & (0.6) & 21.5 & (1.5) & 0.0 & (0.0) \\
2012 (211 days) & 1.0 \(\times\) O\({}_{3}\) & 25.2 & (0.3) & 28.1 & (0.4) & 41.0 & (0.7) & 111.5 & (7.5) & 6.0 & (0.2) \\  & 1.5 \(\times\) O\({}_{3}\) & 43.9 & (0.7) & 46.5 & (0.6) & 71.2 & (0.6) & 165.0 & (4.0) & 33.7 & (0.1) \\  & 2.0 \(\times\) Othe variation in the 1 st and 2 nd flush leaves of _Q.__mongolica_ var. _ crispula_, respectively and 30.6% and 30.1% of the variation in the early and late leaves of _B.__platyphyllla_ var. _japonica_, respectively. We did not evaluate the performance of stomatal conductance model using the \(g_{\mathrm{sw}}\) and corresponding meteorological parameters obtained from the sites different from the present experiment site. The relationships between WDM increments and the whole-plant-based \(\Sigma P_{\mathrm{n,est}}\) during the two growing seasons are shown in Figure 1. The values are plotted for each species across all the treatments. There were significant positive correlations for _F.__crenata_ and _Q.__mongolica_ var. _ crispula_ but those for _Q.__serrata_ and _B.__platyphyllla_ var. _japonica_ were not significant. The responses of relative \(A_{\mathrm{sat}}\) or relative \(\Sigma P_{\mathrm{n,est}}\) to POD\({}_{0}\) in the leaves of _F.__crenata_, _Q.__serrata_, _Q.__mongolica_ var. _ crispula_ and _B.__platyphyllla_ var. _japonica_ are shown in Figure 2a-h. The coefficients of determination (\(R^{2}\)) for the response functions of relative \(A_{\mathrm{sat}}\) or relative value of leaf-level \(\Sigma P_{\mathrm{n,est}}\) to POD\({}_{0}\) were 0.663 and 0.894 in _F.__crenata_, respectively, 0.645 and 0.935 in _Q.__serrata_, respectively, \begin{table}
\begin{tabular}{c c c c c c c c} \hline  & _F.__crenata_ & \multicolumn{2}{c}{_Q.__serrata_} & \multicolumn{2}{c}{_Q.__mongolica_ var. _ crispula_} & \multicolumn{2}{c}{_B.__platyphyllla_ var. _japonica_} \\  & **1 st Flush** & **1 st Flush** & **2 nd Flush** & **1 st Flush** & **2 nd Flush** & **2 nd Flush** & **Early** & **1 ate** \\  & **(\(n\) = 351)** & **(\(n\) = 312)** & **(\(n\) = 191)** & **(\(n\) = 374)** & **(\(n\) = 166)** & **(\(n\) = 352)** & **(\(n\) = 662)** \\ \hline Slope & 0.854 & 0.871 & 0.752 & 0.843 & 0.659 & 0.691 & 0.697 \\ Intercept & 29.0 & 40.5 & 88.4 & 72.4 & 135.2 & 113.7 & 253.1 \\ \(R^{2}\) value & 0.482 & 0.416 & 0.347 & 0.346 & 0.209 & 0.306 & 0.301 \\ RMSE 1 ** & 66.9 & 113.7 & 113.5 & 170.8 & 116.8 & 296.2 \\ MBE 2 ** & 7.1 & 29.8 & 61.5 & 30.3 & 60.5 & 71.8 & 185.1 \\ \hline \end{tabular}
\end{table} 
Table 3: Results of the linear regression analyses of the measured stomatal diffusive conductance to water vapor (\(g_{\mathrm{sw}}\), mmol H\({}_{2}\)O m\({}^{-2}\) LA s\({}^{-1}\)) and \(g_{\mathrm{sw}}\) estimated from the model of [PERSON] et al. (2014), using the modifications of \(g_{\mathrm{max}}\) and the parameters of each function based on the \(g_{\mathrm{sw}}\) obtained in the present study. Figure 1: Relationships between the whole-plant-level \(\Sigma P_{\mathrm{n,est}}\) and whole-plant dry mass (WDM) increment over the two growing seasons. Solid lines indicate the regression line for each species. \(\cap\): _F.__crenata_ (\(y\) = 0.569\(x\) + 70.5, \(R^{2}\) = 0.984, \(p\) \(<\) 0.01), \(\Box\): _Q.__serrata_ (\(y\) = 0.378\(x\) + 222, \(R^{2}\) = 0.890, not significant), \(\Diamond\): _Q.__mongolica_ var. _ crispula_ (\(y\) = 0.401\(x\) + 147, \(R^{2}\) = 0.975, \(p\) \(<\) 0.05), \(\triangle\): _B.__platyphyllla_ var. _japonica_ (\(y\) = 0.235\(x\) + 205, \(R^{2}\) = 0.868, not significant). 0.591 and 0.833 in _Q. mongolica_ var. _crispula_, respectively and 0.602 and 0.760 in _B. platyphyllla_ var. _japonica_, respectively. To discuss the species-specific responses of \(\Sigma P_{\text{n\_est}}\) to POD, we examined the flux threshold appropriate for the linear regression of the responses of \(\Sigma P_{\text{n\_est}}\) to POD\({}_{\text{Y}}\) (Table 4).