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Chloroflexaceae Filamentous Gliding Green Bacteria

	Chloroflexaceae Filamentous Gliding Green Bacteria - Pierson and Castenholz (1974) discovered Chloroflexus aurantiacus, a new genus and species from hot springs in USA, Guatemala, Iceland and New Zealand. Chloroflexus is primarily organotrophic. It can grow chemoorganotrophically under aerobic conditions in the dark or light.
The major bacteriochlorophyll is BChl c. This bacteriochlorophyll differs from BChl c of green sulphur bacteria in being esterified at the C-7'", side chain with steorylalcohol (Chl C5) instead of farnesol. The major carotenoids are β and γ carotene and their derivatives, There is one photocentre.
The sources of hydrogens are hydrogen sulphide and, organic molecules. The major oxidation product is elemental sulphur, and not sulphate. Dubinina and Gorlenko (1975) established a new genus, Chloronema, with two species, C . giganteum and C . spiroideum.
These are planktonic forms in fresh water lakes, and contain gas vacuoles. 'Chlorobium vesicles are present' and contain BChl d. Like all green filamentous bacteria, the species are photoorganotrophic and facultatively anaerobic.

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