Nitrogen fixation in root nodules of Alnus is brought about by
Correct answer: A. Frankia
- A. Frankia
- B. Azorhizobium
- C. Bradyrhizobium
- D. Clostridium
Explanation
The most common symbiotic association of legumes and bacteria on roots is as nodules, which are small outgrowths on the roots. The microbe Frankia is symbiont in root nodules of several non-legume plants like Casurina and Ausln. Both Rhizobium and Frankia are free living in soil but as symbionts they can fix atmospheric nitrogen.
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