C3 Arrhenius parameters from Bernacchi et al.
c3_arrhenius_bernacchi.Rd
Arrhenius 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:
RL_norm
: The respiration rate (RL
) 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 (RL
, 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 ].