Cc -CO2 concentration inside the chloroplast; Ci -intercellular CO2 concentration; ETRI -electron transport rate of PSI; ETRII -electron transport rate of PSII; F0 -minimum fluorescence; F0'-minimum fluorescence in the actinic light; Fm -maximum fluorescence; Fm' -maximum fluorescence in the actinic light; Fv/Fm -maximum quantum efficiency of PSII photochemistry; gmmesophyll conductance; gs -stomatal conductance; Ja -alternative electron flux; Je(PCO) -electron flux to photorespiratory carbon oxidation; Je(PCR) -electron flux to photosynthetic carbon reduction; Jmax -light-saturated potential rate of electron transport; Jtelectron transport rate; Lb -limitation of biochemical capacity; Lm -limitation of mesophyll diffusion; LMA -leaf mass per area; Ls -limitation of stomatal diffusion; Narea -nitrogen content per unit area; Nmass -nitrogen content per unit mass; NO -nonregulated heat dissipation; NPQ -nonphotochemical quenching; P700 -primary electron donor of PSI; PIB -post-illumination burst; Pm or Pm' -maximum P700 signal measured using saturation light pulse following short far-red pre-illumination in dark or light-adapted state; PN -net photosynthetic rate; PNUE -photosynthetic N-use efficiency; qP -PSII efficiency factor (the fraction of open centers); Rd -mitochondrial CO2 release in the dark; RL -light respiration rate; ROS -reactive oxygen species; Vc,max -maximum carboxylation rate limited by Rubisco; Γ* -CO2-compensation point; ΦNA -oxidation status of PSI acceptor site; ΦND -oxidation status of PSI donor site; ΦNO -quantum yield nonregulated heat dissipation; ΦNPQ -quantum yield of nonphotochemical quenching; ΦPSI -quantum yield of PSI photochemistry; ΦPSII -PSII operating efficiency (quantum yield of PSII photochemistry); ΦqP -quantum yield of open centers.