Question

Leguminous plants possess

• A. Napiform roots
• B. Nodulated roots
• C. Tuberous roots
• D. Fusiform roots

Answer 1

Answer: (B)

Nodulated roots

Leguminous plants possess nodulated roots, which are the home for Rhizobium, the symbiotic nitrogen fixing bacteria. Rhizobia are found living in the soil and can exist without a host plant. However, when the legume plants encounter low nitrogen conditions they look to form a symbiotic relationship with rhizobia and they release flavinoids into the soil. When exposed to flavanoids, rhizobia respond by releasing nodulation factor, which stimulates nodule formation in plant roots.