Root Nodules

Root nodules are small lumps or swellings found on the roots of many species of plants, including legumes. The root nodules are formed when bacteria, called Rhizobia, infect the roots and cause the plant to form a protective nodule that contains the bacteria. This symbiotic relationship is beneficial to both plant and bacteria as the bacteria convert atmospheric nitrogen into nitrogen compounds that are used by the plant for growth and photosynthesis. Root nodules are highly beneficial for crop production as they help crops obtain the nitrogen they need for healthy growth and yield. Additionally, the presence of root nodules can be used as an indication of soil fertility and health.