Purple and green(Anoxygenic Phototrophic) bacteria Carotenoids 黑 Spheroides G-9 Pheroi des Carotenoid-less Carotenoid-less mutant. the actual mutant Bchl a colorPurple and Green (Anoxygenic Phototrophic) Bacteria Carotenoids Carotenoid-less mutant, the actual Bchl a color Carotenoid-less mutant