A HYDRAULIC MODEL ON THE TEMPORAL CHANGES OF TRANSPIRATION, CO2 ABSORPTOION AND PHOTOSYNTHESIS IN STOMATA

Abstract

A phenomenological model (Hino 2003, 2004) on the stomatal mechanisms has been applied to calclate the daytime changes of transpiration, sensible and latent heats, CO₂ absorption and phtosynthetic products.
The model is constituted of the several plant-physiological processes such as water storage changes in plant cell, water uptake from soil through root and trunk, osmatic pressure change due to photosynthesis, CO₂ absorption through stomata and CO₂ concentration change in plant cell.
Finally, the recently found phenomenon of'noon's nap of leaves' is explained from the present model.