Deposition of Iodine Onto Plant Leaves from Air

Abstract

The effect of light intensity and relative humidity on the absorption of airborne I131 in tracer concentrations onto attached leaves of broad bean (Vicia faba) was determined. It has been shown that the rate of absorption onto leaves is controlled by the rate of diffusion of the gas through stomata on the leaf surface. The relative humidity is the most important factor in determining the deposition. In dry air the rate was a tenth or less of that in humid air.