Transpiration and the Absorption and Distribution of Radioactive Phosphorus in Plants.

Abstract
After two months of growth in a complete culture solution sunflower plants were transferred to solutions containing 275 [mu]c p32/500 ml for 90 minutes. Transpiration was varied by light vs. darkness, relative humidity, and osmotic pressures of the solutions. P32 distribution was recorded by auto radiograms. It was noted that whatever means was used to vary the amount of transpiration, and, therefore, the amount of water absorbed and transported, there was a positive relationship between water transport and p32 accumulation in the leaves, higher rates of water loss being associated with greater amounts of P32 in the leaves.