Figure 2
From: Distribution of nitrogen fixation and nitrogenase-like sequences amongst microbial genomes
Taxonomic diversity of nitrogen fixing species. Species with fully sequenced genomes (999 Bacteria and 93 Archaea genomes) were analyzed for the minimum set of nitrogen fixation ortholog genes. Taxonomic distribution of diazotrophic species based on experimental evidence (gray bars) and in silico prediction of nitrogen fixation (black bars) is displayed by phylum. The ratio of the number of proposed species versus the number of total distinct species with sequenced genomes within each phylum is indicated.