Explain the development of root nodules in soybean class 11?

Question: Explain the development of root nodules in soybean class 11?

Root nodules in soybean are formed due to a symbiotic relationship between the plant and a bacterium called Bradyrhizobium japonicum. The process of root nodule development in soybean can be divided into several stages:

Infection: The process of nodule development begins when the rhizobia present in the soil come in contact with the root system of the soybean plant. These bacteria invade the roots through small cracks and crevices present in the epidermis.

Nodule initiation: Once the bacteria have invaded the roots, they begin to multiply and form small colonies. These colonies trigger the formation of small bumps on the roots, which eventually develop into nodules.

Nodule formation: As the nodules continue to develop, they begin to grow in size and become more pronounced. The bacteria inside the nodules begin to fix nitrogen from the atmosphere and convert it into a form that can be used by the plant.

Nodule function: Once the nodules are fully developed, they serve as a source of nitrogen for the plant. The nitrogen fixed by the bacteria inside the nodules is used by the plant to support growth and development.

It is important to note that the development of root nodules in soybean is a highly regulated process that is influenced by a variety of environmental and genetic factors. For example, the presence of other nitrogen sources in the soil can inhibit nodule formation, while certain genetic mutations can affect the ability of the plant to form nodules altogether.