An	Net photosynthetic rate
iWUE	Intrinsic water use efficiency
gs	Stomatal conductance
gm	Mesophyll conductance
Topt	Optimal temperature
Vcmax	Maximum carboxylation rate
lm	Mesophyll limitation
ls	Stomatal limitation
lb	Biochemical limitation
Fv/Fm	Photochemical efficiency
CA	Carbonic anhydrase
VPD	Vapor pressure deficit
ΦPSII	PSII photochemical efficiency
NPQ	Non-photochemical quenching
ΦNPQ	Quantum yields of regulated
Φf,D	non-regulated energy dissipation in PSII
qL	Fraction of open reaction centers
Ja	Electron transport rate
Ci	Intercellular CO2 concentration
Rn	Net photosynthetic rate
Rd	Day respiration rate
Cc	Chloroplast carboxylation site
Ca	Ambient CO2 concentrations
PAR	Photosynthetically Active Radiation
gsc	Stomatal conductance to CO2
Fo	Minimum chlorophyll fluorescence
Fm	Maximum chlorophyll fluorescence
$F_m^{\prime }$	Maximum fluorescence in the light-adapted state
Fs	Steady-state fluorescence in the light-adapted state
$F_o^{\prime }$	Minimum fluorescence in the light-adapted state
Tleaf	Leaf temperature
Γ*	CO2 compensation point in the absence of mitochondrial respiration
gm/gs	Ratio of mesophyll to stomatal conductance
Cc/Ca	Ratio of chloroplastic to ambient CO2 concentration
Ci/Ca	Ratio of intercellular to ambient CO2 concentration