An Artificial Leaf for Checking Accuracy in the Estimation of Internal Partial Pressure of CO₂ in Gas-Exchange Measurement

Abstract

Wong et al. (1) showed that leaf conductance (the sum of boundary layer conductance and stomatal conductance) correlated to rate of photosynthesis, A, so that the ratio of intercellular partial pressure of CO₂, p_i and ambient partial pressure of CO₂, p_a, was conservative. Caemmerer and Farquhar (2) demonstrated that p_i is an important parameter of leaf photosynthesis. Accurate estimation of p. required that all the components in the gas exchange system precisely calibrated. In this paper we describe the construction of an artificial leaf that can be used to check the calibration of the gas exchange system.