
1) Bacteria genus 2) Genus rhizobium
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https://www.crosswordclues.com/clue/rhizobium

Rhizobium is a genus of Gram-negative soil bacteria that fix nitrogen. Rhizobium forms an endosymbiotic nitrogen fixing association with roots of legumes and Parasponia. The bacteria colonize plant cells within root nodules; here the bacteria convert atmospheric nitrogen to ammonia and then provide organic nitrogenous compounds such as glutamine o...
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http://en.wikipedia.org/wiki/Rhizobium

(from the article `bacteria`) ...Clostridium pasteurianum, and Klebsiella pneumoniae, are free-living, whereas species of Rhizobium live in an intimate association with leguminous ... Both bacteria and blue-green algae can fix nitrogen directly from the atmosphere, but this is less vital to plant development than the symbiotic ... [5...
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http://www.britannica.com/eb/a-z/r/43

<bacteria> Gram-negative bacterium that fixes nitrogen in association with roots of some higher plants, notably legumes. Forms root nodules, in which it is converted to the nitrogen fixing bacteroid form. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973

Gram negative bacterium that fixes nitrogen in association with roots of some higher plants, notably legumes. Forms root nodules, in which it is converted to the nitrogen-fixing bacteroid form.
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http://www.encyclo.co.uk/visitor-contributions.php

[
n] - the type genus of Rhizobiaceae
Found on
http://www.webdictionary.co.uk/definition.php?query=Rhizobium
genus Rhizobium noun the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.