Root nodules of leguminous plants are known to contain microorganisms that are capable of fixing nitrogen. Because the pea plant is a legume, this type of bacterium is likely to be discovered in its roots.
How do nitrogen-fixing bacteria help plants?
Certain plants and the nitrogen-fixing bacteria that live on them develop mutually beneficial interactions. Ammonium may be produced when bacteria that fix nitrogen receive nitrogen from the atmosphere (N2) and convert it. After that, nitrifying bacteria convert this to NO2 and subsequently NO3, respectively (nitrates). After then, the plants are able to take up these nitrates.
Which plants are nitrogen fixing plants?
The members of the legume family, Fabaceae, are the most well-known and widespread of all the plants that participate in the process of nitrogen fixation. The nodules in the root systems of the plants that belong to this family contain the symbiotic bacteria known as rhizobia. In addition to legumes, there are other types of plants that may fix nitrogen.
What are the two types of nitrogen fixing bacteria?
There are two different kinds of nitrogen-fixing bacteria: free-living bacteria and bacteria that live in symbiotic relationships with other organisms. The symbiotic bacterium known as Rhizobium may be found in the root nodules of leguminous plants such as grams. Rhizobium is responsible for converting the nitrogen found in the air into a form that plants can use.
How do symbiotic nitrogen-fixing bacteria invade the root hairs of plants?
The nitrogen-fixing bacteria in the symbiotic relationship penetrate the root hairs of the host plant, where they proliferate and encourage the creation of root nodules. Root nodules are enlargements of plant cells that are closely associated with bacteria. Bacteria contained within the nodules are responsible for the conversion of free nitrogen to ammonia.