Question

Why root nodules contain leghaemoglobin and look pink in colour??????

Answer 1

Explanation:

Root nodules may appear pink because they contain leghaemoglobin. This is the only haemoglobin found in plants. It absorbs oxygen and provides anaerobic conditions for bacteria in the root nodules. Rhizobium is a facultative anaerobe – it can grow without oxygen.

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Answer 2

Answer:

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Explanation:

Root nodules may appear pink because they contain leghaemoglobin. This is the only haemoglobin found in plants. It absorbs oxygen and provides anaerobic conditions for bacteria in the root nodules. It can fix nitrogen only in anaerobic conditions.