WATER ABSORPTION AND TRANSPIRATION BY LEAVES

Abstract
In semi-arid regions the equilibrium between the vapor pressure of the aerial part of the plant and the atmosphere during rain, as compared to an irrigation, is reflected in a more favorable plant response to the former. This is due to the negative transpiration or moisture absorption through the leaves during a rain. This article presents a technic by which the above is proven and by which gain or loss of water by plants can be quantitatively detd. The plants are grown in sealed Erlenmeyer flasks and exposed to atmospheres of varying humidity.