Editorial use only Scientist pointing to root nodules on leguminous plant (family Fabaceae) roots. These nodules are a result of associations between

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Editorial use only Scientist pointing to root nodules on leguminous plant (family Fabaceae) roots. These nodules are a result of associations between legumes and bacteria called rhizobia. The bacteria convert (fix) atmospheric nitrogen in the soil to ammonia. The plant cannot carry out this process itself, but it is vital for the production of amino acids, the building blocks of proteins. In return the plant passes carbohydrates produced during photosynthesis to the bacteria for use as an energy source.

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