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A legume having symbiotic association wi...

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

A

Crotalaria juncea

B

Sesbania aculeata

C

Sesbania rostrata

D

Cyamopsis tetragonoloba

Text Solution

AI Generated Solution

The correct Answer is:
To determine which legume has a symbiotic association with both Rhizobium and Aerospirillum, we will analyze each of the provided options based on their known relationships with these nitrogen-fixing bacteria. ### Step-by-Step Solution: 1. **Understanding the Symbiotic Relationship**: - Rhizobium is known to form nodules on the roots of legumes, which are essential for nitrogen fixation. - Aerospirillum, on the other hand, forms nodules on the stems of certain legumes. 2. **Analyzing the Options**: - **Option (a): Crotalaria juncea**: This legume does not have a known symbiotic relationship with both Rhizobium and Aerospirillum. Therefore, it is not the correct answer. - **Option (b): Sesbania aculeata**: This legume primarily associates with Rhizobium for root nodules and does not typically form stem nodules with Aerospirillum. Hence, it is not the correct answer. - **Option (c): Sesbania rostrata**: This legume is known to have both root nodules formed by Rhizobium and stem nodules formed by Aerospirillum. This dual association makes it a strong candidate for the correct answer. - **Option (d): Cyamopsis tetragonoloba**: Similar to the previous options, this legume does not have a known symbiotic relationship with both bacteria. Thus, it is not the correct answer. 3. **Conclusion**: - Based on the analysis, **Sesbania rostrata** (Option c) is the legume that has a symbiotic association with both Rhizobium (forming root nodules) and Aerospirillum (forming stem nodules). ### Final Answer: (c) Sesbania rostrata
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