Comparative Analysis of Methanogenic Communities in Different Laboratory-Scale Anaerobic Digesters

Figure 1

Phylogenetic tree indicating the relationship of selected mcrA and mrtA gene sequences to those retrieved from methanogenic strains. Analysis was conducted in MEGA5 using the neighbor-joining method based on Jukes-Cantor evolutionary distances. The percentages of replicate trees in which the associated taxa clustered together in the bootstrap test (1000 replicates) are shown next to the branches. Branches containing more closely related clone sequences were compressed and only one selected clone is shown. Accession numbers of the sequences are shown in brackets. Methanopyrus kandleri was used as outgroup reference. The scale bar represents 5% sequence divergence.