Table 2.

Overview of advantages and disadvantages of estimation methods for R _d

Method	Advantages	Disadvantages
Kok method	Does not require chlorophyll fluorescence measurements	Does not consider the increase of C c with decreased irradiance
	Does not require leaf anatomical measurements	Is theoretically only valid under nonphotorespiratory conditions
		Does not account for the decrease of Φ2 with increased irradiance
Yin method	Does not require leaf anatomical measurements	Requires chlorophyll fluorescence measurements
	Accounts for the decrease of Φ2 with increased irradiance	Does not consider the increase of C c with decreased irradiance
		Is theoretically only valid under nonphotorespiratory conditions
Laisk method	Does not require chlorophyll fluorescence measurements	Requires an assumption of no mesophyll resistance
	Does not require leaf anatomical measurements	Estimate is affected by the position of mitochondria relative to the chloroplasts
	Partly considers the reassimilation of photorespired CO2	Is applied at very low CO2 concentrations and requires gas leakage corrections
	Applies to photorespiratory conditions
Reaction diffusion model	Does not require an estimate of mesophyll conductance	Requires chlorophyll fluorescence measurements
	Accounts for the decrease of Φ2 with increased radiation	Requires leaf anatomical parameters to parameterize the geometry
	The placement of mitochondria relative to the chloroplasts can be defined explicitly	Requires CO2 diffusion coefficients for different mesophyll compartments
	Is theoretically valid under photorespiratory conditions	Has to be solved numerically