Improving the estimation of mesophyll conductance to CO₂: on the role of electron transport rate correction and respiration.

ABSTRACT: Mesophyll conductance (gm) can markedly limit photosynthetic CO₂ assimilation and is required to estimate the parameters of the Farquhar-von Caemmerer-Berry (FvCB) model properly. The variable J (electron transport rate) is the most frequently used method for estimating gm, and the correct determination of J is one of its requirements. Recent evidence has shown that calibrating J can lead to some errors in estimating gm, but to what extent the parameterization of the FvCB model is affected by calibrations is not well known. In addition to determining the FvCB parameters, variants of the J calibration method were tested to address whether varying CO₂ or light levels, possible alternative electron sinks, or contrasting leaf structural properties might play a role in determining differences i

SUBMITTER: Martins SC 

PROVIDER: S-EPMC3733151 | biostudies-literature | 2013 Aug

REPOSITORIES: biostudies-literature