jmax_temperature_param_bernacchi: Jmax-related temperature response parameters from Bernacchi...

In PhotoGEA: Photosynthetic Gas Exchange Analysis

Jmax-related temperature response parameters from Bernacchi et al.

Description

Parameters describing the temperature response of Jmax-related photosynthetic parameters, intended to be passed to the calculate_temperature_response function.

Usage

jmax_temperature_param_bernacchi

Format

List with 2 named elements that each represent a variable whose temperature-dependent value can be calculated using a polynomial equation:

• alpha_j_norm: The apparent quantum efficiency of electron transport (alpha_j) normalized to its value at 25 degrees C.

• theta_j_norm: The empirical curvature parameter normalized to its value at 25 degrees C.

In turn, each of these elements is a list with 3 named elements:

• type: the type of temperature response.

• coef: the polynomial coefficients.

• units: the units of the corresponding variable.

Source

Polynomial coefficients were obtained from Bernacchi et al. (2003). Here, we use the values determined from plants grown at 25 degrees C (Table 2). The coefficients given in the paper are used to calculate the values of alpha_j and theta_j at leaf temperature. Here we normalize by the values of alpha_j and theta_j at 25 degrees C, which are 0.6895 and 0.97875, respectively.

References:

• 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) [\Sexpr[results=rd]{tools:::Rd_expr_doi("10.1046/j.0016-8025.2003.01050.x")}].

PhotoGEA documentation built on April 11, 2025, 5:48 p.m.