The function of leghaemoglobin in the root nodules of legumes is
(1) oxygen removal
(2) nodule differentiation
(3) expression of nif gene
(4) inhibition of nitrogenase activity
(1) The root nodules of legume contains enzyme nitrogenase and leghaemoglobin. Nitrogenase is highly sensitive to the molecular oxygen so it should be ensured that the enzyme is protected from oxygen. To protect these enzyme, the nodule contains an oxygen scavenger called leghaemeglobin.