Molybdenum and the Fixation of Nitrogen in Myrica Root Nodules

Abstract

WE have shown elsewhere¹ that nodulated plants of Casuarina and Alnus, grown under conditions which entail dependence on the fixation of elemental nitrogen, develop symptoms of severe nitrogen deficiency when deprived of molybdenum; this and other evidence obtained is wholly consistent with the view that, as in other biological nitrogen-fixing systems, molybdenum fulfils an essential role in the fixation proceeding in the root nodules of these non-legumes.