Abstract

1. The chlorotic soybean plants accumulated a greater amount of zinc than the healthy green plants. The same phenomenon has been found in the absorption of iron. 2. This parallelism found between the effects of chlorosis upon the accumulation of zinc and upon the accumulation of iron arose the speculation, whether or not it was the response of an increase of some naturally occurring chelating compounds. 3. Zinc in tbe exudated was not found to be bound as an anion. 4. Paper chromatography demonstrated that zinc was bound to some ninbydrin positive substances, which require further identification.