The symbiotic nitrogen fixing bacteria present in root nodules of legumes belong to genus

Xanthomonas

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Pseudomonas

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Rhizobium

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Acetobacter

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Solution

The correct option is C Rhizobium
Rhizobia are the nitrogen-fixing bacteria that form a symbiotic association with roots of leguminous plants. They bring about nodule formation in the root and multiply inside the nodule. They fix atmospheric nitrogen (N $_{2}$ ) into organic form (NH $_{3}$ ) by an enzyme called nitrogenase. The plant supplies all the necessary nutrients and energy for the bacteria. A symbiotic relationship in which both partners benefits is called mutualism.
Thus, the correct answer is option C.

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