They are caused by a symbiotic bacteria which benefits the plant by fixing atmospheric nitrogen (which the plant needs to make proteins).
The two main groups of bacteria responsible for nitrogen fixation are Rhizobium found in legume root nodules, and Azotobacter found in the rhizosphere of various plants. Rhizobium forms a mutualistic relationship with legumes, providing fixed nitrogen in exchange for sugars, while Azotobacter functions as a free-living nitrogen fixer in the soil.
legumes
Nitrogen. :) (All proteins must contain nitrogen. Legumes such as peas and beans are high in protein because they share a mutualistic relationship with Rhizobium bacteria in the soil. The bacteria give the plant nitrogen in the form of nitrate ions in exchange for glucose from the root nodules.) -Izzie. (Hope this helped!!)
Legumes have a symbiotic relationship with certain bacteria called rhizobia. These bacteria live in nodules on the roots of legumes and convert atmospheric nitrogen into a form that the plant can use for growth. This process is called nitrogen fixation and helps enrich the soil with nutrients.
change nitrogen gas into ammonia
The nitrogen-fixing bacteria live in the root nodules of legumes.
Rhizopus bacteria is found in the roots of legumes
No, not all legumes fix nitrogen in the soil. Only certain types of legumes, such as soybeans, clover, and peanuts, have the ability to fix nitrogen through a symbiotic relationship with nitrogen-fixing bacteria in their root nodules.
Special class of bacteria called Rhizomes live on the roots of leguminus plants. They take free nitrate and nitrites from the environment and change to a form that can be readily used by plants. Relationship between nitrogen fixing bacteria and plants is called Symbiosis.
Legumes do. Peas are a good example.
Root nodules are associations between bacteria (such as rhizobia) and plant roots that are responsible for nitrogen fixation. The bacteria convert atmospheric nitrogen into a form that the plant can use, helping the plant to grow in nitrogen-deficient soils. This symbiotic relationship benefits both the plant and the bacteria.
Legume plants are notable for their ability to fix atmospheric nitrogen, thanks to a symbiotic relationship with certain bacteria known as rhizobia found in root nodules of these plants. The ability to form this symbiosis reduces fertilizer costs for farmers and gardeners who grow legumes, and allows legumes to be used in a crop rotation to replenish soil that has been depleted of nitrogen. The nitrogen fixation ability of legumes is enhanced by the availability of calcium in the soil and reduced by the presence of ample nitrogen. Root nodules. via Wikipedia