Stomatal resistance and transpiration rates of shaded and unshaded cacao trees. In: Theobroma v. 17 p. 175-187, 1987.

Abstract

Measured leaf stomatal resistances (Rs) were used to estimate transpiration rates (TR) on different canopy layers shaded and unshaded cacao trees. Data taken on a sunny and an overcast day were used to compare the stomatal and transpirational behavior of the canopies. Stomatal resistances on the overcast day for the unshaded tree increased gradually from the upper to the lower canopy layer, with a consequent decrease in TR.