Paul D. McLennan

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Hydrogen (H2) is a by-product of the symbiotic nitrogen fixation (N2 fixation) between legumes and root-nodule bacteria (rhizobia). Some rhizobial strains have an uptake hydrogenase enzyme (commonly referred to as Hup+) that recycles H2 within the nodules. Other rhizobia, described as Hup−, do not have the enzyme and the H2 produced diffuses from the(More)
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