A maximum hypothesis of transpiration

35Citations
Citations of this article
68Readers
Mendeley users who have this article in their library.

This article is free to access.

Abstract

We hypothesize that the system of liquid water in leaf tissues and the water vapor in the atmosphere tends to evolve towards a potential equilibrium as quickly as possible by maximization of the transpiration rate. We make two assumptions in formulating the transpiration rate: (1) stomatal aperture is directly controlled by guard cell turgor (or leaf water potential); (2) CO2 flux can be used as a nonparametric equivalent of stomatal conductance for a given stomatal function (not necessarily optimal in terms of the water use efficiency for photosynthesis). Transpiration is then expressed as a function of leaf temperature, CO2 flux (as a surrogate of stomatal conductance), and sensible heat flux characterizing the transport mechanism at a given level of radiative energy input. Maximization of transpiration constrained by the energy balance equation leads to vanishing derivatives of transpiration with respect to leaf temperature and CO2 flux. We have obtained observational evidence in support of the proposed hypothesis. Copyright 2007 by the American Geophysical Union.

Cite

CITATION STYLE

APA

Wang, J., Bras, R. L., Lerdau, M., & Salvucci, G. D. (2007). A maximum hypothesis of transpiration. Journal of Geophysical Research: Biogeosciences, 112(3). https://doi.org/10.1029/2006JG000255

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free