After mutagenesis,the bacteria Sinorhizobium meliloti became unable to colonize Medicago truncatula plants due to the absence of recognition by the host plant.Which of the following genes is most likely the site of mutation?

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Sinorhizobium meliloti is a rhizobacterium that forms a symbiotic relationship with leguminous plants such as Medicago truncatula. The recognition and subsequent nodulation of the plant by the bacterium are mediated by nod factors, which are signal molecules produced by the bacterium. Mutations in the genes encoding nod factors can result in the inability of the bacterium to establish a symbiotic relationship with the plant, as observed in the given scenario. Therefore, the most likely site of mutation is the gene responsible for the synthesis of nod factors (C).

After Mutagenesis,the Bacteria Sinorhizobium Meliloti Became Unable to Colonize Medicago