Publications

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2 Publications

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Alternative nitrogenase activity in the environment and nitrogen cycle implications

X. Zhang, D.L. McRose, J.-P. Bellenger, F.M.M. Morel

Journal Article

Biological nitrogen fixation, the main natural input of fixed nitrogen into the biosphere, is catalyzed by Mo-, V-, or Fe-only nitrogenase metalloenzymes. Although “alternative” V- and Fe-only nitrogenase genes are found in many environments, the contribution of these isoenzymes to N2 fixation is unknown. Here we present a new method (ISARA,…

Ammonium Sensitivity of Biological Nitrogen Fixation by Anaerobic Diazotrophsin Cultures and Benthic Marine Sediments

R. *Darnajoux, L. *Reji, X.R. *Zhang, K.E. *Luxem, X. Zhang

Journal Article

New bioavailable nitrogen (N) from biological nitrogen fixation (BNF) is critical for the N budget and productivity of marine ecosystems. Nitrogen-fixing organisms typically inactivate BNF when less metabolically costly N sources, like ammonium (NH 4 +), are available. Yet, several studies have observed BNF in benthic…