C3 Arrhenius parameters from Bernacchi et al.
c3_arrhenius_bernacchi.RdArrhenius parameters describing the temperature response of important C3
photosynthetic parameters, intended to be passed to the
calculate_arrhenius function.
Format
List with 7 named elements that each represent a variable whose temperature-dependent value can be calculated using the Arrhenius equation:
Rd_norm: The respiration rate (Rd) normalized to its value at 25 degrees C.Vcmax_norm: The maximum rate of rubisco carboxylation (Vcmax) normalized to its value at 25 degrees C.Vomax_norm: The maximum rate of rubisco oxygenation (Vomax) normalized to its value at 25 degrees C.Gamma_star: The value of CO2 partial pressure in the chloroplast at which no assimilation occurs in the absence of respiration.Kc: The Michaelis-Menten constant for rubisco carboxylation.Ko: The Michaelis-Menten constant for rubisco oxygenation.J_norm: The electron transport rate (J) normalized to its value at 25 degrees C.
In turn, each of these elements is a list with 3 named elements:
c: the (dimensionless) Arrhenius scaling factor.Ea: the activation energy inkJ / mol.units: the units of the corresponding variable.
Source
Some of these parameters (Rd, Vcmax, and J) are
normalized to their values at 25 degrees C. Vomax is normalized to the
value of Vcmax at 25 degrees C. These variables include _norm in
their names to indicate this.
The remaining parameters (Gamma_star, Kc, and Ko) are not
normalized because they are assumed to not vary significantly between species.
Arrhenius parameters for J were obtained from Bernacchi et al. (2003).
Here, we use the values determined from chlorophyll fluorescence measured from
plants grown at 25 degrees C (Table 1). Although Bernacchi et al. (2003)
reports values of Jmax, here we assume that both Jmax and the
light-dependent values of J follow the same temperature response
function and refer to it as J for compatibility with
c3_arrhenius_sharkey.
The Arrhenius parameters for the other variables were obtained from Bernacchi et al. (2001).
References:
Bernacchi, C. J., Singsaas, E. L., Pimentel, C., Jr, A. R. P. & Long, S. P. "Improved temperature response functions for models of Rubisco-limited photosynthesis" Plant, Cell & Environment 24, 253–259 (2001) [doi:10.1111/j.1365-3040.2001.00668.x ].
Bernacchi, C. J., Pimentel, C. & Long, S. P. "In vivo temperature response functions of parameters required to model RuBP-limited photosynthesis" Plant, Cell & Environment 26, 1419–1430 (2003) [doi:10.1046/j.0016-8025.2003.01050.x ].