Rhizobia are soil bacteria that fix nitrogen (diazotrophs) after becoming established inside root nodules of legumes (Fabaceae). Rhizobia require a plant host; they cannot independently fix nitrogen. In general, they are Gram-negative, motile, non-sporulating rods. == History == The first species of rhizobia, Rhizobium leguminosarum, was identifie...
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http://en.wikipedia.org/wiki/Rhizobia
Bacteria in a symbiotic relationship with leguminous plants that results in nitrogen fixation. See Nitrogen fixation.
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http://www.encyclo.co.uk/local/20095
<microbiology> Bacteria in a symbiotic relationship with leguminous plants that results in nitrogen fixation. ... (23 Aug 1998) ...
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http://www.encyclo.co.uk/local/20973
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