Table 1.

Model parameter estimates under controlled and field conditions

Parameter name	Description	Unit	Greenhouse (value at 25 °C)	Field (value at 25 °C)	Source
g 0	Intercept parameter in Medlyn stomatal conductance model	mol H2O m−2 s−1	0.091	0.027	Equation (1) fit on light response curves (controlled conditions) or combined photosynthesis-stomatal conductance model fit on diurnal data (field)
g 1	Slope parameter in Medlyn stomatal conductance model	Dimensionless	1.90	6.46	Equation (1) fit on light response curves (controlled conditions) or combined photosynthesis-stomatal conductance model fit on diurnal data (field)
g 0,new	Intercept parameter in modified stomatal conductance model	mol H2O m−2 s−1	0.093	0	Equation 2 fit on light response curves (controlled conditions) or combined photosynthesis-stomatal conductance model fit on diurnal data (field)
g 1,new	Slope parameter in modified stomatal conductance model	Dimensionless	104	322	Equation (2) fit on light response curves (controlled conditions) or combined photosynthesis-stomatal conductance model fit on diurnal data (field)
$V_{\text{cmax}}$	Maximal rate of RuBP carboxylation	µmol m−2 s−1	121	115.2	Fitted on CO2 response curves
V TPU	Maximal rate of triose phosphate utilization	µmol m−2 s−1	11.5	14.1	Fitted on CO2 response curves
g m	Mesophyll conductance to CO2 transfer	mol CO2 m−2 s−1 bar−1	0.60	0.60	Derived from carbon isotope measurements
R d	Mitochondrial respiration not associated with photorespiration, under illuminated conditions	µmol m−2 s−1	1.35	1.16	Estimated as y intercept of linear correlation between An versus J under light limited range
J max	Maximal rate of whole-chain electron transport (J)	µmol m−2 s−1	205	200	Estimated from fitting non-rectangular hyperbole to chlorophyll fluorescence measurements during light response curves
α	Initial slope non-rectangular hyperbolic fit of J response to light intensity	Electrons/photons	0.79	0.72	Estimated from fitting non-rectangular hyperbole to chlorophyll fluorescence measurements during light response curves
θ	Shape factor non-rectangular hyperbolic fit of J response to light intensity	Dimensionless	0.74	0.75	Estimated from fitting non-rectangular hyperbole to chlorophyll fluorescence measurements during light response curves
f PSII	Proportion of absorbed light partitioned to PSII	Dimensionless	0.50	0.50	Not estimated here
NPQmax	Asymptote value sigmoidal fit of non-photochemical quenching (NPQ) response to light intensity	Dimensionless	2.24	2.81	Estimated from fitting sigmoidal Hill function to chlorophyll fluorescence measurements during light response curves
NPQ0	Basal NPQ value	Dimensionless	0.15	0.42	Estimated from fitting sigmoidal Hill function to chlorophyll fluorescence measurements during light response curves
K NPQ	Light intensity at half amplitude of NPQ	Dimensionless	1042	1672	Estimated from fitting sigmoidal Hill function to chlorophyll fluorescence measurements during light response curves
n NPQ	Apparent Hill coefficient for NPQ response to light	Dimensionless	2.52	2.28	Estimated from fitting sigmoidal Hill function to chlorophyll fluorescence measurements during light response curves
m	Slope parameter to estimate effect of reaction centre inactivation on minimal fluorescence ($F_{\text{o}}^{\prime }$)	Dimensionless	2.34 × 10−4	2.34 × 10−4	Estimated from fitting Eq. (11) on chlorophyll fluorescence measurements during light response curves
n	Intercept parameter to estimate effect of reaction centre inactivation on $F_{\text{o}}^{\prime }$	Dimensionless	0.038	0.038	Estimated from fitting Eq. (11) on chlorophyll fluorescence measurements during light response curves