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Explain the role of the pink colour pigm...

Explain the role of the pink colour pigment in the root nodule of legume plants. What is it called ?

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The pink colour pigment in root nodule of legume plant is Leg-haemoglobin. Enzyme nitrogenase is highly sensitive to the molecular oxygen. It requires anaerobic condition. Leg haemoglobin which is oxygen scavenger protects enzyme nitrogenase from oxygen.
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