Fig. 1.

Microscopy images of the phototrophic Gemmatimonadetes strain AP64 and 16S rRNA gene phylogeny showing the position of the Gemmatimonadetes phylum among the Bacteria domain. (A, Left) Infrared epifluorescence microscopy image (false colors). (Center) Scanning electron microscopy image. (Right) Transmission electron microscopy image of an AP64 cell. (B) phylogenetic tree of 16S rRNA genes based on the data from the All Species Living Tree project (www.arb-silva.de/). Orange wedges indicate the bacterial phyla that contain chlorophototrophic species. Scale bar represents changes per position.