Discussion
Which bacteria produces a variety of Nod factors and nodulate a large variety of legumes as well as non-legume Parasponia andersonii ?
Answer: C
The bacterium is Rhizobium NGR234.
Rhizobium sp. NGR234, isolated in Papua New Guinea, has the broadest host range known among rhizobia, nodulating plants of more than a hundred legume genera and also the non-legume Parasponia andersonii. Its breadth comes from producing a large family of different Nod factors, the signal molecules that trigger nodule formation.
Sinorhizobium meliloti nodulates mainly alfalfa and its relatives, Bradyrhizobium japonicum soybean, and Rhizobium leguminosarum peas, clover and beans. Each has a narrow host range and a small set of Nod factors.
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