## 5 Conclusions
\begin{tabular}{c c c} \hline
**Symbols** & **Definition** & **Unit** \\ \hline \(A_{\text{net}}\) & net CO2 assimilation rate & \(\mu\text{mol m}^{-2}\) s\({}^{-1}\) \\ \(A_{\text{g}}\) & gross photosynthesis & \(\mu\text{mol m}^{-2}\) s\({}^{-1}\) \\ \(R_{\text{d}}\) & the daytime respiration & \(\mu\text{mol m}^{-2}\) s\({}^{-1}\) \\ C\({}_{\text{c}}\) & the chloroplastic CO2 partial pressure & \(\mu\text{mol m}^{-2}\) s\({}^{-1}\) \\ \(\Gamma\)* & the chloroplastic compensation point of CO2 & \(\mu\text{mol m}^{-2}\) s\({}^{-1}\) \\  & the fraction of total electron transport of & \\ \(\zeta\) & mesophyll and bundle sheath allocated to & / \\  & mesophyll & \\ F\({}_{1}\) & the PSI fluorescence yield by the PAM & / \\  & fluorometer for C\({}_{3}\) species & / \\ F\({}_{\text{o}}\) & minimal fluorescence in the dark of & / \\  & dark-adapted leaves from the PAM & / \\ F\({}_{\text{m}}\) & maximal fluorescence in the dark of & / \\  & dark-adapted leaves from the PAM & / \\ F\({}_{\text{m}^{\prime}}\) & maximal fluorescence emission in the & / \\  & light-adapted state from the PAM & / \\ F\({}_{\text{t}}\) & steady-state fluorescence emission induced by & / \\  & the measuring beam of the PAM fluorometer & / \\ \(\phi_{\text{F}}\) & the quantum yield of fluorescence emission & / \\ \(\phi_{\text{N}}\) & the quantum yield of regulated heat dissipation & / \\  & the quantum yield of constitutive heat & / \\ \(\phi_{\text{D}}\) & dissipation & / \\ ChlF\({}_{\text{L}}\)(\(\lambda\)) & the passive ChlF spectrum in the range 640 to 850 nm at the leaf scale & mW m\({}^{-2}\) nm\({}^{-1}\) sr\({}^{-1}\) \\ ChlF\({}_{\text{L}\_\text{U}}\)(\(\lambda\)) & the fluorescence radiance emitted from adaxial & \(\mu\text{W cm}^{-2}\) nm\({}^{-1}\) sr\({}^{-1}\) \\ ChlF\({}_{\text{L}\_\text{D}}\) & the fluorescence radiance emitted from abaxial & \(\mu\text{W cm}^{-2}\) nm\({}^{-1}\) sr\({}^{-1}\) \\ ChlF\({}_{\text{L}\_\text{PSII}}\)(\(\lambda\)) & the contribution of PSII to measurements of & mW m\({}^{-2}\) nm\({}^{-1}\) sr\({}^{-1}\) \\  & the PSI contribution at SW wavelengths, F\({}_{\text{1\_SW}}\) = & / \\ F\({}_{\text{1\_LW}}\) & the PSI contribution at LW wavelengths, F\({}_{\text{1\_LW}}\) = & / \\ ChlF\({}_{\text{P}}\)(\(\lambda\)) & downscaling the ChlF\({}_{\text{L}\_\text{PSII}}\)(\(\lambda\)) to the & mW m\({}^{-2}\) nm\({}^{-1}\) sr\({}^{-1}\) \\ ChlF\({}_{\text{P}}\)(\(\lambda\)) & the probability that a fluorescence photon & \\ \(f_{\text{esc\_P-L}}\) & escapes from the PSII light reactions inside the & / \\  & leaves to the surface of the leaf & \\ \(R\) & leaf reflectance & / \\ \(T\) & leaf transmittance & / \\  & the rate coefficients of energy-dependent heat & / \\ \(K_{\text{N}}\) & dissipation & / \\ \(X\) & the relative light saturation & / \\ \(\theta_{\text{SWC}}\) & gravimetric soil water content & \% \\ AC & Rubisco-limited gross CO2 assimilation & \(\mu\text{mol m}^{-2}\) s\({}^{-1}\) \\ AJ & RuBP-limited gross CO2 assimilation & \(\mu\text{mol m}^{-2}\) s\({}^{-1}\) \\ \(\alpha_{\text{grm}}\) & the absorption efficiency of PAR by green leaves & / \\ \(\beta_{\text{PSII}}\) & fraction of absorbed energy allocated to PSII & / \\ \(\sigma\) & the product of leaf light absorptance, fraction of & / \\  & absorbed photons allocated to PSII and \(\phi\text{Pmax}\) & \(\mu\text{mol m}^{-2}\) s\({}^{-1}\) \\ \(V_{\text{cmax}}\) & the maximum carboxylation capacity of Rubisco & \(\mu\text{mol m}^{-2}\) s\({}^{-1}\) \\ \(K_{\text{mC}}\) & Michaelis-Menten constants of Rubisco for CO2 & \(\mu\text{bar}\) \\ \(C_{\text{m}}\)o & Michaelis-Menten constants of Rubisco for O2 & \(\mu\text{bar}\) \\ \(O_{\text{c}}\) & the chloroplastic O2 partial pressure & \(\mu\text{bar}\) \\ \hline \end{tabular}