What do you understand by symbiotic nitrogen fixation?

1.	What do you understand by symbiotic nitrogen fixation?
Answer» When nitrogen fixation is performed by a mutualistic relation established between a microbe and plant, the process is called symbiotic N₂ fixation. Here the two alone independently can not carry out the process and N₂ fixation has an outcome of the interaction of the microbe and the plant. Example: Root nodule of leguminous plants containing Rhizobium bacteria. Anabaena alga present in the leaves of Azolla (A pteridophyte).

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