Purple and green(Anoxygenic Phototrophic) Bacteria Nonsulfur purple bacteria can only used sulfide at a low concentration; have great photoheterotrophic abilities; some have ability to utilize methanol as sole carbon source for phototrophic growth; Rhodospirillum fulvum most are active N2 fixers 飞 Rhodopseudomonas acidophila Rhodopila globiformis Rhodocyclus purpureus 933 ros""""""" Rhodomicrobium vannielii? Rhodobacter sphaeroides 7Purple and Green (Anoxygenic Phototrophic) Bacteria Nonsulfur purple bacteria can only used sulfide at a low concentration; have great photoheterotrophic abilities; some have ability to utilize methanol as sole carbon source for phototrophic growth; most are active N2 fixers. Rhodospirilum fulvum Rhodopseudomonas acidophila Rhodobacter sphaeroides Rhodopila globiformis Rhodocyclus purpureus Rhodomicrobium vannielii