Name the most crucial enzyme found in root nodules for nitrogen-fixation? Does it require a special %
pink coloured pigment for its functioning? Elaborate.
Nitrogenase enzyme is found in root nodules fornitrogen-fixation. Enzymes responsible for nitrogenase action are very susceptible to destruction by oxygen (infact, many bacteria cease production of the enzyme in the presence of oxygen).
This enzyme requires a special pink coloured pigment for its functioning. Many nitrogen fixing organisms exist only in anaerobic conditions, respire to bring down oxygen levels or bind the oxygen with protein such as leghaemoglobin.