title: Development of a photosynthesis model with an emphasis on ecological applications : IV. Wholephot - Whole leaf photosynthesis in response to four independent variables.
abstract: A physiologically based steady-state model of whole leaf photosynthesis (WHOLEPHOT) is detailed which describes the functional dependence of net photosynthesis in C3leaves on [CO2], [O2], incident radiant flux (PhAR), and leaf temperature. The model simulates among other phenomena a) observed [CO2], [O2], and temperature effects on the initial slope of light response curves, b) a C3type temperature response curve of net photosynthesis, c) a shift of the optimum temperature of net photosynthesis to higher temperatures with increasing light intensity, and d) observed temperature and [O2] effects on the CO2compensation point. Model parameters are derived from published response data of several C3species. Simulations also demonstrate that parameter changes based on literature data result in acclimation-like changes in net photosynthesis response with respect to light intensity and temperature. The advantages of this model are that the number of parameters is minimized in order to focus on environmental effects and that all parameters can be determined from measured net photosynthesis responses.
authors.affiliation: The Biological Station and Matthaei Botanical Gardens, Division of Biological Sciences, The University of Michigan, 48109, Ann Arbor, Michigan, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Tenhunen
authors.affiliation: The Biological Station and Matthaei Botanical Gardens, Division of Biological Sciences, The University of Michigan, 48109, Ann Arbor, Michigan, USA.
authors.forename: S S
authors.initials: SS
authors.lastname: Westrin