First slide

Metabolism of Nitrogen

Question

Filamentous bacterium that helps in nitrogen fixation in root nodules of non-legumes is:

Easy

A

Rhizobium associated with pea plant
B

Rhizobium associated with Casuarina
C

Frankia associated with Alnus
D

Frankia associated with groundnut

Solution

The microbe, Frankia, also produces nitrogen-fixing nodules in the roots of non-leguminous plants (e.g., Alnus). Frankia is free-living in the soil, but as symbiont, it fixes atmospheric nitrogen.

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