Purple bacteria or purple photosynthetic bacteria are proteobacteria that are phototrophic, that is, capable of producing energy through photosynthesis. They are pigmented with bacteriochlorophyll a or b, together with various carotenoids, which give them colours ranging between purple, red, brown, and orange.
Read more about Purple Bacteria: Metabolism, History, Evolution, Taxonomy
Famous quotes containing the words purple and/or bacteria:
“While making this portage I saw many splendid specimens of the great purple fringed orchis, three feet high. It is remarkable that such delicate flowers should here adorn these wilderness paths.”
—Henry David Thoreau (1817–1862)
“To the eyes of a god, mankind must appear as a species of bacteria which multiply and become progressively virulent whenever they find themselves in a congenial culture, and whose activity diminishes until they disappear completely as soon as proper measures are taken to sterilise them.”
—Aleister Crowley (1875–1947)