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bacteroid

bacteroid The form adopted by a nitrogen-fixing bacterium when active within the root nodule of a host plant. For example, Rhizobium bacteria change into enlarged irregularly shaped branching cells when they infect the root cells of their legume host. These bacteroids become surrounded by a peribacteroid membrane, derived from membranes of their host cells, and differentiate to produce the key enzymes and other components of nitrogen fixation, such as nitrogenase. As the infection process progresses, the bacteroids become housed in a root nodule, where they are totally dependent on their host for the energy required for nitrogen. In return they supply their host with an assimilable form of nitrogen, i.e. ammonia, which is incorporated into amino acids. See nitrogen fixation.

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"bacteroid." A Dictionary of Biology. . Encyclopedia.com. 16 Aug. 2017 <http://www.encyclopedia.com>.

"bacteroid." A Dictionary of Biology. . Encyclopedia.com. (August 16, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/bacteroid-1

"bacteroid." A Dictionary of Biology. . Retrieved August 16, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/bacteroid-1

bacteroid

bacteroid A modified bacterial cell, particularly of the type formed by species of Rhizobium within the root nodules of leguminous plants.

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"bacteroid." A Dictionary of Ecology. . Encyclopedia.com. 16 Aug. 2017 <http://www.encyclopedia.com>.

"bacteroid." A Dictionary of Ecology. . Encyclopedia.com. (August 16, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/bacteroid

"bacteroid." A Dictionary of Ecology. . Retrieved August 16, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/bacteroid

bacteroid

bacteroid A modified bacterial cell, particularly of the type formed by species of Rhizobium within the root nodules of leguminous plants.

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"bacteroid." A Dictionary of Plant Sciences. . Encyclopedia.com. 16 Aug. 2017 <http://www.encyclopedia.com>.

"bacteroid." A Dictionary of Plant Sciences. . Encyclopedia.com. (August 16, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/bacteroid-0

"bacteroid." A Dictionary of Plant Sciences. . Retrieved August 16, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/bacteroid-0