Question

What is the function of leghaemoglobin in the root nodule of a legume?

Answer 1

Nitrogenase:

Nitrogen fixation is carried out by an oxygen sensitive enzyme called nitrogenase present in certain bacteria.

Role of leg haemoglobin in nitrogen fixation:

Leg-haemoglobin is a special red-coloured pigment present in the nodules of leguminous plants. Its roles are:

● Acts as an oxygen scavenger (binds to oxygen)

● Prevents the oxidation and inactivation of nitrogenase even in the aerobic environment of the root nodules

● Allows smooth running of nitrogen fixation