Table 2 Contributions of N2-fixation and nodulation to the metabolic costs of SNF.

From: Genome-scale metabolic reconstruction of the symbiosis between a leguminous plant and a nitrogen-fixing bacterium

Nitrogen source

Nodulation state

Relative plant growth rate

N2-fixation

Nodulated

0.717

N2-fixation

Nodulated but without maintenance costs

0.781

N2-fixation

Non-nodulateda

0.812

Exogenous ammonium

Non-nodulateda

1

  1. aNon-nodulated indicates that nodule biomass was excluded from the overall biomass reaction and nodule maintenance costs were removed. As N2-fixation in ViNE is unlinked to the production or maintenance of nodule biomass (unless stated otherwise), N2-fixation can occur without nodulation.
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