Purple and green (anoxygenic Photptrophic) bacteria x 88 Representatives of several genera of nonsulfur purple bacteria. (a) Rhodospirillum fulvum; cells are about 3 um long. (b) Rhodopseudomonas aci dophila: cells are about 4 um long. (c)Rhodobacter sphaeroides cells are about 1.5 um wi de (d)Rhodopila globiformis cells are about 1.6 um wide. (e Rhodocyclus purpureus: cells are Rhodomi crobiun vannielii: cells are about 1.2 um widePurple and Green(Anoxygenic Photptrophic) Bacteria