bacteria which fix nitrogen from atmosphere and supply it to plant is____(sundew,rhizobium,venus flytrap,haustoria)
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Diatomic nitrogen is abundant in the atmosphere and soil, but plants are unable to use it because they do not have the necessary enzyme, nitrogenase, to convert it into a form that they can use to make proteins.
Soil bacteria, or rhizobia, are able to perform biological nitrogen fixation in which atmospheric nitrogen gas (N2) is converted into the ammonia (NH3) that plants are able to use to synthesize proteins.
Both the plants and the bacteria benefit from the process of nitrogen fixation; the plant obtains the nitrogen it needs to synthesize proteins, while the bacteria obtain carbon from the plant and a secure environment to inhabit within the plant roots.
Key Terms
rhizobia: any of various bacteria, of the genus Rhizobium, that form nodules on the roots of legumes and fix nitrogen
nitrogen fixation: the conversion of atmospheric nitrogen into ammonia and organic derivatives, by natural means, especially by microorganisms in the soil, into a form that can be assimilated by plants
nodule: structures that occur on the roots of plants that associate with symbiotic nitrogen-fixing bacteria.
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