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A quantitative analysis of the direct and indirectcosts of nitrogen fixation: a model based onAzotobacter vinelandii

Inomura, Keisuke; Bragg, Jason; Follows, Michael J.


Nitrogen fixation is advantageous in microbial competition when bioavailable nitrogen is scarce, but has substantial costs for growth rate and growth efficiency. To quantify these costs, we have developed a model of a nitrogen-fixing bacterium that constrains mass, electron and energy flow at the scale of the individual. When tested and calibrated with laboratory data for the soil bacterium Azotobacter vinelandii, the model reveals that the direct energetic cost of nitrogen fixation is small...[Show more]

CollectionsANU Research Publications
Date published: 2017
Type: Journal article
Source: The ISME Journal: multidisciplinary journal of microbial ecology
DOI: 10.1038/ismej.2016.97
Access Rights: Open Access


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