Question

A legume having symbiotic association with two nitrogen fixing bacteria (Rhizobium and Aerospirillum) is

• A. Crotalaria juncea
• B. Sesbania aculeata
• C. Sesbania rostrata
• D. Cyamopsis tetragonoloba

Answer 1

The correct option is C Sesbania rostrata

Sesbania rostrata can bear nodules on roots and stem at the same time. The presence of Rhizobium species in nodulated roots and Aerospirillum in stem nodules is a characteristic feature of S.rostrata.

The nitrogen fixing bacteria enters the roots and leads to the incessant growth of the cortical cells which forms nodules which act as a primary site for the nitrogen fixation.

So, the correct answer is option C.