Respiratory Enzyme Systems in Symbiotic Nitrogen Fixation I

Abstract

Studies on the biochemistry of symbiotic nitrogen fixation (Wilson and Fred, 1937) indicate that oxidation reactions play a significant, though probably indirect, r6le in this process. A survey of the properties of the respiratory enzymes in species of the root-nodule bacteria (Rhizobium sp.), both when grown alone and with the proper host plant, appears necessary for progress on the problem of the mechanism of the reaction. Previous studies of the respiratory activities of the root-nodule bacteria (