Question

The bacterium_____belonging to group actinomycetes, produces N2-fixing nodules on the roots of non-leguminous plants (e.g., Alnus)

Answer 1

Answer:

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Frankia is a Gram-positive species of actinomycete filamentous bacterium that lives in symbiosis with actinorhizal plants of the genus Alnus. It is a nitrogen-fixing bacterium and forms nodules on the roots of non-leguminous trees. 

Thus, the correct answer is 'Frankia

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