Purple and green(anoxygenic Phototrophic)bacteria Green sulfur and green nonsulfur photrophic bacteria. (a) Chlorobium limicola cells are about 0.8 um wide. Note the sulfur granules deposited exteacellul arly. (b) Pelodictyon clathratiforme, a bacterium forming a three-dimensional network; cells are about 0. 8 um wide. hloroflexus aurantiacus, a filamentous gli ding bacterium; cells are about 1 um wide. (d)Oscillochloris, a large filamentous, gliding green bacterium; cells are about 5 um wide. Phase contrast. The brightly contrasting material is the hol dfast. (e) Electron micrograph of Oscillochloris.The chlorosomes in this preparation are darkly stained.Purple and Green(Anoxygenic Photptrophic) Bacteria