Temperature responses of leaf net photosynthesis: the role of component processes
Researchers: Yan-Shih Lin, Belinda E. Medlyn, David S. Ellsworth Documentation: Oxford Journals (2011) The response of photosynthesis to temperature is a central facet of plant response to climate. Such responses have been found to be highly variable among species and among studies. Understanding this variability is key when trying to predict the effects of rising global temperatures on plant productivity. There are three major factors affecting the response of leaf net photosynthesis to temperature (An–T): (i) photosynthetic biochemistry, (ii) respiration and (iii) vapour pressure deficit (D) and stomatal sensitivity to vapour pressure deficit during measurements. The overall goal of our study was to quantify the relative contribution of each of these factors in determining the response of An to temperature. We first conducted a sensitivity analysis with a coupled photosynthesis–stomatal (An–gs) model, using ranges for parameters of each factor taken from the literature, and quan