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An example of a nitrogen-fixing bacteria is the cyanobacteria. Cyanobacteria is a blue-green algae that plays part in the nitrogen cycle.
Nitrogen fixed bacteria are microorganisms that can be found in soil and plant roots. The nitrogen fixed bacteria are symbiosis which means that they have a biological interaction between two different types of biological organism. The symbiotic microorganisms would attract themselves to hairs of the host plant, where they multiply and stimulate the formation of the root nodules, because of this it helps enlargement of the plant cells and bacteria basically having a mutual association.
The nodules play a big part as within the nodules the bacteria would convert surrounding nitrogen to ammonia which the plant would utilize for its development.
Nitrogen plays a big part in our existence as nitrogen is a major part of amino acids, which are the building blocks of proteins and of nucleic acids such as DNA. Nitrogen comes from certain types of vegetables like radishes, beans and peas. Essentially it helps our vegetables grow better.
-Nitrogen Fixing Bacteria is also called diazotrophs.
-There are actually only three types of nitrogen-fixing bacteria, Mutualistic, Symbiotic and free living.
-While both seem the same, the Mutualistic is where both partners benefit from the relationship and Symbiosis is where there is persistent contact between partners.
Free-living don’t attract onto a plant and cannot tolerate oxygen very well so they habitat are with low oxygen such as soil and decaying vegetable mattter
An example of Mutualistic Bacteria and plants is cyanobacteria.
-The chloroplast in plant cells are actually cyanobacterium living in the plant cell benefit from oxygenic and water supplied by plants.
-An example of Symbiotic Bacteria and plant is the leguminous plants and rhizobia, where rhizobium bacteria are connected onto the roots of legumes, that’s persistent contact, symbolistic literally means “living together”.
https://www.britannica.com/science/nitrogen-fixing-bacteria