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Which parts of Fabales plants commonly form root nodules?
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Fabales
A flowering stalk of yellow partridge pea (Chamaecrista fasciculata) in the eastern United States.
In plants belonging to the order Fabales, particularly within the Fabaceae family, root nodules are formed when symbiotic nitrogen-fixing bacteria invade the plant's root hairs.1
Once the bacteria enter the root hairs, they multiply and stimulate the formation of these nodules, which appear as enlargements of plant cells and bacteria in an intimate association. These nodules serve as the site where the bacteria convert atmospheric nitrogen into ammonia, providing the plant with essential nutrients for development.1