This research dealt with the direct environmental influence of atmospheric vapor pressure on stomates of Pseudotsuga menziesii, Picea engelniannii, and Fragaria X ananassa, and the indirect physiological
control of stomates by abscisic acid in Pseudotsuga menziesii. Two ventilated porometers (diffusion and steady-state) were compared on four broadleaf and five coniferous...
