Growth-promoting Effects of Ethylene-diamine Tetra-acetic Acid
Abstract
THE recent communication by Heath and Clark1 prompts us to present some of our observations of presumed plant hormone effects of the chelating agent ethylenediamine tetra-acetic acid. Reference to these observations was made in a review on the application of chelation to agriculture2. Our interest in this problem developed from observations, made in the summer of 1953, on massive growth response to ethylenediamine tetra-acetic acid by sunflower plants in water culture; metal complexing...